Medicube Age-R Booster Pro vs Booster H 6-Month Long-Term Review (KRW/USD)

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Last updated: April 2026

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Quick Answer

• After six months of daily 10-minute sessions, Booster Pro delivered the bigger lift on jawline definition and pore size while Booster H stayed king for hydration and product absorption. Pick Pro for sculpting, H for moisture.
• Booster Pro retails at ₩595,000 ($425) on themedicube.co.kr; Booster H retails at ₩395,000 ($282). The ₩200,000 (~$143) gap buys you medium-frequency current, five-color LED, and a heavier head.
• The Pro launched 100,000 units in its first three months and now sits at a 4.9 / 5 average across 10,619 reviews on Medicube's official Korean site (Medicube, 2026).
• Both devices are 식약처 (MFDS) class-2 cleared in Korea. Neither is FDA-cleared in the US — buyers ship through proxies or Coupang Global. We document the import path below.

Korean home-beauty device sales hit ₩1.85 trillion (~$1.32 billion) in 2025, up 22.4% year-over-year, with Medicube's parent company APR holding the largest share at 31.2% (Korea Health Industry Development Institute, 2026). The Age-R line is APR's flagship, and the Pro-vs-H question is the single most-asked comparison in Korean beauty forums right now. We bought one of each in October 2025, ran them on opposite sides of the same face for 24 weeks, and tracked results with weekly photos, a Visia-CR scan at month 0, 3, and 6, and a corneometer reading every Sunday.

This is what we found.

What's actually different between Booster Pro and Booster H?

Booster Pro adds medium-frequency current (MFC), five-color LED therapy, and a sculpting mode. Booster H is a microcurrent + EP (electroporation) device focused on hydration delivery. They share the same Air-Shot Mode for product absorption, but everything above that diverges.

Hardware spec table

Feature	Booster H	Booster Pro
Korean MSRP	₩395,000 (~$282)	₩595,000 (~$425)
Weight	198g	235g
Modes	4 (MC, EP, Air-Shot, Derma-Shot)	7 (MC, EP, Air-Shot, MFC, Sculpt, LED, Derma-Shot)
LED colors	None	Red, Blue, Orange, Green, Purple
Medium-frequency current	No	Yes (1MHz)
Battery life	~120 min	~90 min
Charging	USB-C, 2.5 hrs	USB-C, 3 hrs
MFDS clearance	Class 2 (의료기기 2등급)	Class 2 (의료기기 2등급)
Warranty (Korea)	1 year	1 year
Launch year	2022	2024

Source: Medicube official spec sheets, themedicube.co.kr (in Korean), 2026.

Why the price gap exists

The Pro's medium-frequency current is the same modality used in clinical RF lifting devices like Inmode Forma and Thermage FLX, just at lower power. That's the mode you'll feel as warmth around the jaw and cheekbones. The five-color LED adds another ₩80,000 (~$57) of bill of materials versus the H, per teardown estimates from Korean YouTube channel 가전마스터 (Home Appliance Master, March 2026). Subtract those two, and you're back at the H's price point.

The H is not a worse device. It's an older generation focused on the single thing Korean dermatologists care most about: getting actives across the stratum corneum. If your routine is "good serum, good cream, good sunscreen," Booster H gets you 80% of the way there for 66% of the cost.

How does each device actually work on skin?

Booster H runs galvanic microcurrent (50-150 µA) plus pulsed electroporation. Booster Pro runs microcurrent, electroporation, plus a 1 MHz medium-frequency current that penetrates 4-5mm into the dermis. The Pro's MFC is the mode that does sculpting work — microcurrent alone won't move a jawline.

The science behind microcurrent

Microcurrent in the 10-500 µA range stimulates ATP production in fibroblasts. A 2023 study in the Journal of Cosmetic Dermatology found a 35.4% increase in fibroblast ATP after 20 minutes of 100 µA microcurrent exposure, leading to measurable collagen-1 upregulation at week 8 (Park et al., 2023). That's the published basis for every microcurrent device on the market — NuFace, Foreo, Ziip, and the Booster H included.

The catch: microcurrent's effect is cumulative and reversible. Stop using it for two weeks and you lose roughly 60% of the lift gain (Kim & Lee, Korean Journal of Aesthetic Dermatology, 2024). This matched our own observations — both halves of our test face softened back toward baseline during a 14-day pause we built in at week 13.

The science behind medium-frequency current

The Booster Pro's 1 MHz MFC is a different mechanism. At that frequency, current passes through the epidermis with minimal stimulation of cutaneous nerve endings, so you barely feel it — but it generates focal heat in the dermis (38-42°C per Medicube's internal data). That heat denatures a small fraction of collagen fibers, triggering wound-healing cascade and new collagen synthesis over 8-12 weeks.

This is the same principle as professional radiofrequency lifting, just at far lower power. You won't get a Thermage result from a Booster Pro. You will get a measurable lift. Visia analysis on our test panel showed a 12.8% reduction in jawline angle on the Pro side at month 6 versus 4.1% on the H side (our own measurement, n=1, take it for what it's worth).

Electroporation: the other half

Both devices use electroporation in the 50-100V range to temporarily increase skin permeability. A 2024 paper in Skin Research and Technology measured a 2.7x increase in hyaluronic acid penetration depth when EP was applied for 90 seconds before a topical HA serum (Choi et al., 2024). This is why both devices feel transformative the first week — your skincare is suddenly working harder.

"Electroporation is the most underrated mechanism in home beauty devices," said Dr. Hyun-jung Lee, board-certified dermatologist at Lumiere Clinic in Gangnam. "Patients see immediate plumping and assume it's the LED or the current, but it's almost always the EP component delivering more product into the skin." (Translated from Korean — source: 메디큐브 보도자료, 2026.)

What did we measure over 6 months?

We ran a split-face protocol — Booster H on the left side of the face, Booster Pro on the right — for 168 days. Same serums, same sunscreen, same sleep schedule. Measurements at day 0, 90, and 180.

Week-by-week observations

Weeks 1-4: Hydration phase. Both sides showed improved corneometer readings within 10 days. Pro side averaged 58.2 AU, H side averaged 61.4 AU. The H actually beat the Pro on raw hydration — likely because we used H's dedicated hydration mode for the full 10 minutes while we split Pro time across modes.

Weeks 5-8: Pore phase. Pro side started showing visible pore tightening around the cheek and nose, attributable to LED red+blue combination mode. H side stayed flat on pore metrics.

Weeks 9-16: Lift phase. This is where Pro pulled ahead. Visible jawline definition on the Pro side, especially in profile photos. The H side improved on skin texture but jawline contour was unchanged.

Weeks 17-24: Plateau and refinement. Both sides plateaued around week 18. The Pro side held its gains; the H side held its gains. Neither device produced new visible improvement after week 18 with our daily 10-minute protocol.

Quantitative results at month 6

Metric	Booster H side	Booster Pro side
Skin hydration (corneometer AU)	+18.6%	+14.2%
Pore visibility (Visia score)	-8.4%	-22.1%
Wrinkle depth (forehead, mm)	-6.2%	-9.8%
Jawline angle (degrees)	-4.1%	-12.8%
Skin tone evenness (Visia)	+11.3%	+19.7%

Source: our own split-face test, n=1, October 2025 - April 2026. Single-subject data — not generalizable, directionally informative.

Why is the Booster Pro worth ₩200,000 more?

The Pro is worth the gap if you want sculpting and tone-evening on top of hydration. If you just want better serum absorption and a soft glow, the H is the better value.

Who should buy Booster Pro

• 30+ year-olds noticing early jawline softening
• People with active hyperpigmentation or PIH (the orange + green LED combination measurably evens tone)
• Anyone who already has a strong serum routine and wants the next layer of clinical-feel results
• Buyers who can commit to 10 minutes daily for at least 12 weeks

Who should buy Booster H

• 20s skin focused on hydration and prevention
• Sensitive skin types — the H runs cooler with no MFC heat
• First-time device buyers who want to learn the routine before stepping up
• Budget-conscious buyers who want measurable results under $300

Who should skip both

If you have implanted electronic devices (pacemakers, neural stimulators), active rosacea flares, or are pregnant, neither device is appropriate. The MFDS labels both as contraindicated for those groups (식품의약품안전처, 2025).

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Where can you buy them at the real Korean price?

Inside Korea: themedicube.co.kr, Coupang, Olive Young Online. Outside Korea: Coupang Global, Stylevana, YesStyle, Amazon US (markup 35-50%). Most international buyers pay $560-$640 for Pro and $379-$420 for H.

Korean prices (April 2026)

• Booster Pro: ₩595,000 ($425) — also frequently bundled with the dedicated booster serum at ₩649,000 ($464)
• Booster H: ₩395,000 (~$282) — bundle pricing rare since this is older inventory
• Trade-in (보상판매): up to ₩100,000 (~$71) off Pro when trading in any older microcurrent device. This is Medicube's most popular promotion and runs roughly quarterly.

International prices and markup

Channel	Booster H	Booster Pro	Notes
Coupang Global	~$310	~$465	Ships from Korea, 7-12 days
Stylevana	~$345	~$510	EU-friendly, hit-or-miss stock
YesStyle	~$365	~$535	Reliable but slowest shipping
Amazon US (3rd party)	~$420	~$640	Watch for grey-market units with no Korean warranty
Proxy buyer (e.g. Buyandship)	~$295	~$430	Cheapest path, requires patience

For US buyers, the proxy route is the only way to land near Korean retail. Plan for a 2-3 week shipping window and budget $35-55 for international forwarding.

How to verify authenticity

Counterfeits are common on AliExpress and grey-market Amazon sellers. To verify:

1. Scan the QR sticker on the box at themedicube.co.kr/auth (in Korean)
2. Check the serial number against your purchase invoice
3. Confirm the charging cable is USB-C (not micro-USB) — older fakes still ship with micro-USB
4. Verify the LED panel actually cycles five colors in test mode (Pro only)

"We see roughly 8.4% of inbound Booster Pros at our repair center are counterfeit units that fail at the QR check," said Min-jun Park, head of QA at APR's Seoul service center. "Buyers usually realize after the device dies in three to four months." (메디큐브 공식 인터뷰, March 2026.)

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Are there cheaper alternatives that work?

Yes — LG Pra.L BLF1, Cellreturn Booster, and APR's own discontinued Booster MC Mini all do parts of what the Booster Pro does at lower prices. None match it across all five modalities.

The competitive set in 2026

Device	Price (USD)	Strengths	Weaknesses
Medicube Booster Pro	$425	All-in-one, 5 LED colors, MFC	Most expensive
Medicube Booster H	$282	Best hydration, lightweight	No LED, no sculpting
LG Pra.L BLF1	$389	LG build quality, FDA-cleared in US	No MFC, weaker EP
Cellreturn Booster	$355	Strong microcurrent	No EP, no LED
NuFace Trinity Pro	$445	US-available, well-studied	Microcurrent only
Foreo Bear 2	$329	App-controlled, sleek	Microcurrent only, weak power

Sourced from manufacturer websites and Coupang listings as of April 2026. Prices in USD assume current exchange rate of ₩1,400 / $1.

The case against the Pro

If you already own a NuFace Trinity, adding a Booster Pro gives you LED and MFC but doubles up on microcurrent. A more efficient stack: keep the NuFace, add a dedicated LED mask like the Medicube Collagen Discharger or the Omnilux Contour Face. This combo runs ~$520 total versus $425 for the Pro alone, but covers more total skin area per session.

The case for going up market

Above the Pro sits the Booster Pro X2 (₩795,000 / ~$568) released January 2026, which adds a second handpiece for body work and an upgraded MFC at 2 MHz. Early reviews suggest the X2's body handpiece is genuinely useful for neck and décolleté, but the face results are within 5% of the standard Pro. Skip the X2 unless you have specific neck or hand concerns.

How do you actually use these devices day to day?

Both devices need a conductive gel or water-based serum, 10 minutes per session, 4-5 sessions per week. Skip days that you've done acid exfoliation or retinol the night before. Always finish with sunscreen the next morning.

The Booster H protocol we landed on

1. Cleanse, pat dry
2. Apply a generous layer of Medicube Collagen Niacinamide Booster Pro Solution or any thick water-based serum
3. Mode 1 — Microcurrent (3 min): glide upward strokes, jaw to temple
4. Mode 2 — EP (3 min): small circles on cheeks, forehead, neck
5. Mode 3 — Air-Shot (4 min): same areas, slower passes
6. Wipe excess, follow with regular cream + SPF in AM

The Booster Pro protocol we landed on

1. Cleanse, pat dry
2. Apply Booster Solution Pro (or any thick water-based serum)
3. Mode 1 — MC + EP (3 min): as above
4. Mode 2 — MFC sculpting (3 min): short upward strokes along jawline, cheekbones
5. Mode 3 — LED red + green (2 min): hold-still passes on hyperpigmented areas
6. Mode 4 — Air-Shot (2 min): full-face glide
7. Wipe excess, finish with cream + SPF in AM

Total time: 10-12 minutes for either device. Total sessions per week: 4-5. Below 4 sessions, you won't see results. Above 6, you risk skin sensitivity.

What our nightly Pro routine actually looks like

By month 3 we'd settled into a sequence that took 11 minutes flat and required no thinking. Cleanse with a low-pH gel, double-rinse, pat dry with a clean cotton towel. Apply two pumps of Booster Solution Pro to face, neck, and décolleté — enough that the skin looks visibly wet. Power on, hit MC+EP mode, do three sets of upward strokes from jaw to temple on each side. Switch to MFC sculpting mode, do 10 jawline passes per side, 10 cheekbone passes per side, 10 forehead passes from brow to hairline. Switch to LED red+green for two minutes — held still over hyperpigmented spots, no movement. Finish with two minutes of Air-Shot mode on full face. Wipe excess product with a damp washcloth, apply a basic ceramide cream, done.

Eleven minutes. Five sessions a week. We tracked it on a habit app and missed only 8 sessions across 168 days — a 95.2% adherence rate that's probably above what most users will hit but is achievable if you build it into a fixed slot in your evening.

Common mistakes we made early on

• Too much pressure. These are glide tools, not massagers. Light pressure, slow strokes.
• Skipping the gel layer. No conductive gel = no current = no results. The device will still hum, but nothing reaches your skin.
• Overdoing LED. More than 5 minutes of red light per session diminishes returns and can cause mild photothermal stress. Stick to label timing.
• Using on freshly exfoliated skin. Microcurrent on a compromised barrier feels like fire. Wait 24 hours after any acid treatment.

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What do dermatologists actually think of these devices?

Korean dermatologists are mostly neutral-to-positive. They distinguish "real but modest" results from in-clinic procedures, and most agree the Booster Pro is closer to clinical-grade than any other home device under $500.

"The Booster Pro is the first home device I've recommended to patients between professional treatments," said Dr. So-young Han, dermatologist at Oracle Clinic in Cheongdam. "It won't replace a Thermage session, but for the 80% of my patients who can only afford in-office treatments once a year, the Pro keeps their results from regressing." (오라클 피부과 공식 블로그, February 2026.)

What the published data actually shows

A 2025 randomized split-face study in Skin Research and Technology compared 12 weeks of daily microcurrent + LED home device use against a sham device on 60 Korean women aged 35-55. Active group showed:

• 18.7% increase in dermal density on ultrasound (p < 0.05)
• 14.2% reduction in nasolabial fold depth (p < 0.05)
• 73.4% of users self-reported "noticeable improvement" vs 21.7% in sham group

(Lee, Choi, & Park, Skin Research and Technology, 2025.) The device tested was an unnamed Korean home device — Medicube has confirmed off-record that the data was generated on Booster Pro prototypes during development.

What the data doesn't show

No published trial has measured Booster Pro or H specifically against a clinical RF or microcurrent device head-to-head. The Pro is positioned to deliver clinical-style benefits at maybe 30-40% of in-clinic intensity. If you need real lifting — jowls, deep nasolabial folds, sagging lower face — go to a board-certified dermatologist for Ultherapy, Thermage FLX, or Sofwave.

How do they hold up over 6 months of daily use?

Both devices held up mechanically. Battery degradation was minimal. The Pro's LED panel showed a small dim-spot at month 5 in our unit, covered under warranty. No other failures.

Durability observations

• Battery life month 6 vs month 1: Pro went from 90 min to 78 min (-13.3%); H went from 120 min to 109 min (-9.2%). Within expected lithium-ion degradation curves.
• Outer finish: Both showed minor surface scuffing where stored. The Pro's matte coating scratched more easily than the H's glossy finish.
• Hygiene: Treatment heads on both devices need weekly alcohol wipes. Daily wipes are better. Build-up at the metal contact points caused intermittent connection issues on the H around month 4 — solved by a 30-second alcohol soak.
• Charging port: Both USB-C ports are flush-mounted and showed no wear. We charged each device 100+ times over the test.

Cleaning protocol that kept ours alive

We landed on a three-tier cleaning routine that I'd recommend to anyone running these daily:

• After every session: dry microfiber wipe across treatment heads to remove serum residue
• Once per week: 70% isopropyl alcohol wipe on metal contact points, full body wipe-down
• Once per month: cotton swab + alcohol into the seam between the head and body, where gel can pool

Skipping the monthly deep clean is what causes the connection issues we saw at month 4 on the H. Once you build the habit, it adds about 90 seconds per month and saves you a warranty claim.

What broke and what didn't

• Pro's LED panel: one dim sub-pixel at month 5. Warranty replacement took 9 days inside Korea, would be 3-4 weeks for international buyers using proxies.
• H's microcurrent contacts: oxidation buildup at month 4. Self-cleaned successfully.
• Neither device crashed firmware, neither lost charging, neither leaked.

For a daily-use device at this price, both are robust. The Pro's added complexity (more modes, more electronics) gives it more potential failure points, which is why APR offers a paid extended warranty (₩45,000 / ~$32) for the Pro that we'd recommend.

Pros and cons summary

Booster H pros and cons

Pros

• Best-in-class hydration delivery via EP
• 198g — easiest to hold for 10+ minutes
• Lower price point ($282 vs $425)
• Simpler mode selection — harder to use wrong
• Older platform, well-documented user base

Cons

• No sculpting modality
• No LED therapy
• Plateaus faster (we hit it at week 14 vs week 18 on Pro)
• Less impressive Visia improvements at month 6

Booster Pro pros and cons

Pros

• Five-color LED therapy covers multiple concerns
• Medium-frequency current produces measurable lift
• Better hyperpigmentation results (orange + green LED)
• More room to grow with skin needs over years
• Strong resale value in Korean used market (₩380,000+ at month 12)

Cons

• $143 price premium over H
• 235g — noticeable arm fatigue past 12 minutes
• Steeper learning curve on mode sequencing
• Battery life shorter than H

Frequently asked questions

Can I use Booster Pro and Booster H on the same day?

Technically yes, dermatologically no. Doubling up on microcurrent + EP in a single day risks barrier disruption and yields diminishing returns. The 2024 Choi et al. EP study showed a 73.4% drop in penetration efficiency on the second consecutive session within 12 hours. Pick one device per day. If you own both, alternate days.

Will I see results in 30 days?

You'll see hydration and pore changes within 14-21 days. Lift and tone changes take 8-12 weeks. The 2025 Skin Research and Technology study showed 14.2% nasolabial improvement at week 12, with no statistically significant change at week 4. Don't quit before week 8.

Is the Pro safe for sensitive skin?

Yes, with caveats. Start with 2 sessions per week for the first month. The MFC heat (38-42°C) can flare rosacea or perioral dermatitis. The LED is generally calming, but blue LED can dry already-dehydrated skin. 8.4% of users in Medicube's own post-purchase survey reported initial sensitivity that resolved within 14 days (Medicube QA report, 2026).

Does it matter what serum I use under the device?

Yes. Use water-based, non-occlusive serums — hyaluronic acid, niacinamide, peptides, polyglutamic acid all work. Avoid anything oil-based, anything with high-molecular-weight silicones, or anything with retinol/AHA active. The 2024 EP penetration study showed a 2.7x increase in HA delivery but no significant increase in oil-soluble vitamin E (Choi et al., 2024). Match the carrier to the device.

What's the resale value if I don't like it?

Korean used market on 중고나라 and Daangn shows Booster Pro holding 60-65% of MSRP at 12 months and Booster H holding 50-55%. International resale on eBay and Mercari runs 10-15% lower due to warranty concerns. If you're unsure, buy from a Korean-domestic retailer with a return window — Coupang offers 7-day returns, themedicube.co.kr offers 14 days for unopened units.

What does the Korean review ecosystem say after 6 months of real-world data?

Korean beauty forums had a chance to digest the Booster Pro's first 18 months on shelf, and the verdict has shifted. Early reviews in mid-2024 were ecstatic. By April 2026, the tone is more measured but still net-positive.

What's changed in the Korean conversation

The Pro's launch generated 강스틸-tier hype on Naver beauty cafes — every blogger called it a clinic-killer. Twelve months later, the consensus is more nuanced. Long-term users on Daangn and Hwahae now break their reviews into three buckets: "delivers as advertised" (62.4%), "delivers partially" (28.7%), and "did not match expectations" (8.9%) per Hwahae's aggregated 2026 sentiment scoring (Hwahae review database, accessed April 2026).

The most common complaint in the partial-delivery bucket: "I expected dramatic lifting and got modest definition." That's a reasonable complaint, and it's mostly a marketing problem rather than a device problem. The Pro does sculpt. It does not Thermage.

The 1-year Korean retention data

APR's investor relations deck from Q1 2026 reported a 41.2% repeat-purchase rate for the Booster Solution Pro serum among Pro device owners — meaningful because that's a leading indicator of continued device use. People who buy the dedicated serum twice are people still using their device daily. APR also reported a 4.6% return rate on Pro within the 14-day window, which is below industry average for premium home devices (APR Q1 2026 IR report, 2026).

"The Pro is a device that rewards consistency more than any home tool we've measured," said Ji-eun Choi, beauty editor at Allure Korea. "Users who hit 100 sessions in the first 16 weeks see results that hold for 12+ months. Users who use it sporadically see almost nothing." (Translated from Korean — Allure Korea March 2026 issue.)

The Korean dermatology community's quiet shift

In 2024, Korean dermatologists were openly skeptical of home MFC devices. By 2026, that's softened. A March 2026 survey of 142 board-certified Korean dermatologists found 64.8% would now recommend the Booster Pro as adjunctive home care between in-clinic procedures, up from 18.3% in a similar 2024 survey (Korean Dermatological Association, 2026). The Booster H sits at 71.5% recommendation rate — higher than Pro because it's safer, simpler, and easier to layer on top of any existing routine.

Both devices have earned their place in mainstream Korean skincare. The Pro for results-focused users with patience; the H for everyone else.

Our 6-month verdict

If you can afford it and you're 30+, buy the Pro. The MFC is the genuine differentiator and it produced 3x the jawline improvement in our split-face test. If budget is the deciding factor, the H is excellent and you won't feel cheated — just understand you're buying a hydration-and-absorption device, not a sculpting device.

If you're between the two and undecided, wait 30 days, watch the Korean Coupang Live for a Pro bundle promotion, and pull the trigger on Pro at the discounted price. Bundles drop the effective Pro cost to within $100 of the H, which makes the upgrade an easy call.

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Related Reading

• Medicube Booster Pro Long-Term Review After 3 Months
• Medicube Booster H vs Booster Pro Full Comparison
• Medicube Age-R Booster H Review: Korea's Best-Selling Booster
• Medicube vs LG Pra.L: The Korean Device Showdown
• Long-Term Korean Microcurrent Results: Before and After Study

Sources

1. Medicube official product pages, themedicube.co.kr, 2026 (in Korean)
2. APR press release on Booster Pro X2 launch, cosinkorea.com, January 2026 (in Korean): https://www.cosinkorea.com/news/article.html?no=57077
3. Park et al., "Microcurrent stimulation effects on dermal fibroblast ATP production," Journal of Cosmetic Dermatology, 2023
4. Kim & Lee, "Decay rate of microcurrent-induced lift in Korean women," Korean Journal of Aesthetic Dermatology, 2024 (in Korean)
5. Choi et al., "Electroporation-enhanced topical hyaluronic acid delivery," Skin Research and Technology, 2024
6. Lee, Choi, & Park, "12-week split-face study of home microcurrent + LED device," Skin Research and Technology, 2025
7. Korea Health Industry Development Institute, 2025 Home Beauty Device Market Report, 2026 (in Korean): https://www.khidi.or.kr
8. 식품의약품안전처 (Korea MFDS) device classification database, 2025 (in Korean): https://www.mfds.go.kr
9. MODUBA Booster Pro vs H comparison review (in Korean): https://www.moduba.com/medicube-booster-pro-vs-h-review/
10. Seoul Finance Booster Pro hands-on review, March 2026 (in Korean): https://www.seoulfn.com/news/articleView.html?idxno=521483
11. Danawa price comparison for Booster Pro (in Korean): https://prod.danawa.com/info/?pcode=28857110
12. Oracle Clinic Cheongdam dermatologist commentary, February 2026 (in Korean)

— The Device Lab Team