Warranty & Support
+2 CapillusCapillus PRO S1: 3 Years · Kiierr 302 Ultra Flex: 2 Years.
Product comparison · Laser Hair Growth Caps & Helmets
Capillus PRO S1 vs Kiierr 302 Ultra Flex
The Capillus PRO S1 scores 6.1 and ranks 13th of 40 in Laser Hair Growth Caps & Helmets; the Kiierr 302 Ultra Flex scores 5.2 and ranks 24th of 40 in Laser Hair Growth Caps & Helmets. The PRO S1 leads on warranty & support.
All 7 Capillus products 
Capillus PRO S1
$2,499 · 13th of 40 in Laser Hair Growth Caps & Helmets
Buy Now- Warranty & Support — 6 against 4
6.1
5.2
All 11 Kiierr products 
Kiierr 302 Ultra Flex
$1,799 · 24th of 40 in Laser Hair Growth Caps & Helmets
Buy NowAcross everything we scored, Capillus PRO S1 sits 0.84 ahead — led by warranty & support.
Verdict
PRO S1 ahead · +0.84 (6.1 vs 5.2)Pick the Capillus PRO S1 when
Warranty & support matters6vs4
Wavelength spec matters10vs9
A longer warranty matters3 Yearsvs2 Years
Pick the Kiierr 302 Ultra Flex when
Price matters$1,799vs$2,499
Scored 8 October 2026 from published specs and owner reviews. We don't buy or test units. How we score
Where the Capillus PRO S1 and Kiierr 302 Ultra Flex differ
Scores on a 0–10 scale. Each row is one criterion, biggest difference first.
Wavelength Spec
+1 CapillusVerification
tiedCoverage
tiedBuild Quality
tiedEase of Use
tiedValue
tiedLight Output
one side unscoredWhat Capillus PRO S1 and Kiierr 302 Ultra Flex owners report
Independent sources, scored for each model. PRO S1 on 5 of five, 302 Ultra Flex on 4.
The Kiierr 302 Ultra Flex reading covers the whole brand.
What they say
Capillus PRO S1
- Owner reports on this exact cap are few and scattered: an r/blueprint_ owner (November 2023, 82-comment thread) bought the Pro S1 on a non-sponsored doctor's YouTube recommendation and reported only an occasional itchy scalp four months into daily use, then wrote in 2026 that he had stopped his Capillus roughly three years into near-daily use over a scalp-skin complaint.
- A June 2024 r/HairTransplants update lists the Pro S1 in a daily routine for five months, and a September 2026 commenter used the Pro S1 for about a year and then moved to the Spectrum.
- On price, the same November 2023 thread put the Pro S1 at about $2,400 with Black Friday discounts, and an August 2024 r/redlighttherapy thread discusses physician-channel MD and RX caps priced above the Pro S1.
Kiierr 302 Ultra Flex
- Reddit discussion of Kiierr is mostly about the company rather than one cap, and it runs negative on the guarantee and on support.
- In a July 2026 r/tressless thread (32 comments), one owner says a return requested after 10 months on the extended guarantee drew the 25 percent service fee, over $500, although monthly photos had been sent, because the returns manager wanted them submitted month by month with no lapse; the poster and another commenter add that most Kiierr content they find on Instagram and Reddit is paid partnerships and affiliate blog posts.
- The long-running r/redlighttherapy thread on the Kiierr MD cap (94 comments, 2022 to 2026) carries a November 2022 owner report of a battery that soon needed charging after every session, a loose USB connector, a cap too small with the larger size costing about twice as much, and a refund only after 7 months with photos and a restocking fee.
- Later replies in the same thread report $1,500 lost with emails and calls ignored (January 2024), an order that shipped while it was being cancelled and could not then be returned (August 2025), and a European buyer who waited a month for delivery, called the build very good quality and never received the promised gifts (July 2025).
- An October 2025 r/Hairloss thread (5 comments) calls Kiierr's Reddit ads predatory, and an August 2026 commenter says the brand advertised a Shark Tank appearance it never made.
The Kiierr 302 Ultra Flex reading covers the whole brand.
What they say
Capillus PRO S1
- Innerbody Research, which earns commission on its buy links, handled the Pro S1 hands-on for its laser-cap guide (last updated January 2025), named it "best feature set," and photographed it sitting noticeably deeper on the head than the Kiierr 272 MD.
- Its testers found the Bluetooth app quick and consistent to connect, with the session timer pausing whenever the cap came off, though the serial-number registration video in the app was not accessible.
- The same commission-earning guide lists the Pro S1 at $2,999 with a 3-year cap warranty, 1-year battery and adapter cover, 4 to 5 sessions per charge, a 6-month guarantee and a 25 percent restocking fee, and puts it at nearly three times the $999 Kiierr 272 Premier.
- Other Pro S1 pages from Red Light Skin Lab (Amazon affiliate links), ReHair Laser, Healthspotr (commission links) and Hair Helpline are templated spec write-ups with no hands-on use and are not counted.
Kiierr 302 Ultra Flex
- Three hands-on write-ups cover Kiierr caps, all from sites that earn on the sale or received the unit.
- Wareable's May 2026 review of the 148 Pro, on a site carrying affiliate links to Kiierr, rated it 3.5 out of 5, found the roughly one-pound cap comfortable through three months of 30-minute sessions, liked the beep every 10 minutes and the auto-off, and named a power pack that takes 10 to 12 hours to recharge as its main annoyance.
- Innerbody's review, which sells the caps under its own 15 percent code INNERBODY, tested the 272 MD on camera, lists 5 to 7 sessions per charge on the Premier and 8 to 10 on the MD, faults the 30-minute every-other-day routine as long, and says the complaints it found mostly concern communication during returns under the 7-month guarantee.
- 5 Minutes for Mom's 2020 to 2022 review used a cap Kiierr sent free, with no affiliate link, and found it simple to run with a 30-minute auto-off.
- The rest of the Kiierr web coverage is templated affiliate pages and coupon sites that show no use.
YouTube
tiedThe Capillus PRO S1 reading covers its product line; the Kiierr 302 Ultra Flex reading covers the whole brand.
What they say
Capillus PRO S1
- HairHoney's February 2022 video (11,414 views, stated not sponsored, a unit bought for her mother) on a 272-laser Capillus priced near $3,000 calls the dome massive and hard to keep on straight and notes slight warmth, while crediting the six-minute session and the $58-a-month payment plan.
- Ryan's Reviews & Tutorials (December 2023, 6,470 views, Amazon affiliate links in the description) has run an older 30-minute Capillus for eight years and finds its shell identical to the Illumiflow 272, with 3 to 4 sessions per charge and a loose sit on smaller heads.
- Florencia Rodriguez's May 2023 video (6.3K views) on the 82-laser Capillus Ultra, used about 18 months, notes a battery pack good for several uses, an included case and the sensor that cuts the lasers when the cap comes off.
- Beautyistic's June 2025 video on the 272-laser Capillus Pro (338 views, commission links in the description) calls the silicone lining snug and the price steep.
Kiierr 302 Ultra Flex
- Independent video coverage of Kiierr is thin and monetised.
- Healthnews, a channel that sells the caps under its own code CYB beside iRestore, HigherDOSE and Mito deals, has three Kiierr videos: a July 2024 unboxing of the 272 Premier (12,783 views), a January 2026 review after about a month of use, and a February 2026 comparison against the iRestore Elite (6,353 views).
- In the January 2026 review the presenter found the 272 comfortable while watching TV or working, felt only light warmth, and pointed to the Velcro strap at the back for sizing and the 30-minute auto-off.
- The same video tells buyers to keep a before photo for the 7-month guarantee and notes the two-year warranty for a unit that malfunctions.
Amazon
tiedThe Kiierr 302 Ultra Flex reading covers the whole brand.
What they say
Capillus PRO S1
- The Amazon US listing (ASIN B0BC9Z2GHX), sold by Curallux and shipped by Amazon at $2,199, holds 3.1 from 17 ratings, split 46 percent five-star against 44 percent one-star.
- Four of the eight reviews shown on the listing describe a cap that stopped powering on or would not take a charge, two of them after five to six months, and two owners say a return or refund was refused once the window had closed.
- On the other side, one gift buyer praises the build, comfort and carrying case, and one owner with a 23.5-inch head got a full refund from customer service when the S1 fit tight, then moved to the S2.
- The 272-laser Capillus PRO (3.4 from 12) and the Spectrum (3.4 from 9) carry their own separate review files.
Kiierr 302 Ultra Flex
- Kiierr's Amazon store, sold by Kiierr International and fulfilled by Amazon, carries one laser-cap listing with ratings, the 272 Premier listed under its clearance name 'Family of Devices, 272 and 148' (ASIN B0BGT7JBNM), at 3.8 from 107 ratings, split 56 percent five-star against 18 percent one-star, at $1,099.99.
- Amazon's aspect tags on it read quality 24 mentions, 22 positive; ease of use 20, all positive; fit 8, 5 positive; staying in place (Amazon's 'adhesiveness' tag) 8, 5 negative; battery life 6, 4 positive; and size 5, 4 negative.
- Quoted reviews say the cap runs small, one from a buyer with a 23-inch head who could not pull it down against a 24-inch claim, and another reports a battery beeper that failed on arrival, emails left unanswered and no phone number to call.
- The only other rated Kiierr device in the store is the Illuminate face mask at 4.0 from 22 ratings, some of them Vine reviews of free units, and the remaining listings are shampoo, conditioner, serum and a shower filter.
Owner reviews
one side unscoredThe Capillus PRO S1 reading covers its product line; no usable source for the Kiierr 302 Ultra Flex.
What they say
Capillus PRO S1
- Costco's listing for the 272-laser Capillus Pro Cap (item 4000187826, $1,199.99 when listed, no longer returned by Costco search) holds 3.5 from 67 native member reviews posted August 2023 to April 2025, 43 percent five-star against 27 percent one-star, with 14 recommending and 14 not.
- None of the 67 is syndicated or flagged incentivised.
- Fit comes up in 12 reviews, with several saying the one-size cap is too small or has to be held on and one saying Capillus refused to supply a size above 24 inches.
- Two reviews report battery-pack faults, one beeping nonstop out of the box and one failing after five uses on a second purchase after an earlier pack was repaired.
Kiierr 302 Ultra Flex
No usable source.
Capillus PRO S1 vs Kiierr 302 Ultra Flex: pros and cons
What each one does well, and where it falls short.
Capillus PRO S1
What we like
- 304 lasers at 650 nm and 5 mW each1,520 mW total stated
- Class 3R statedwith wavelength and per-diode output published
- 6-minute auto-timed daily sessioncordless
- 3-year cap warranty
- Fits heads up to 24 inchesan inch more than the PRO
What holds it back
- Sold as FDA-clearedlisted under K162994 and K163170, which describe no 304-diode cap
- Sold out on capillus.com at $2,499$2,199 on Amazon from Curallux
- Amazon 3.1 from 1744 percent one-star
- Stopped powering on or charging4 of 8 Amazon reviews shown
- Battery pack and adapter covered 1 year
- Guarantee refunds keep a 25 percent fee and return shipping
Kiierr 302 Ultra Flex
What we like
- 302 lasers at 650 nm1,510 mW total per Kiierr
- 6-minute daily sessions with an on-head sensor and auto-off
- Flexible capcordless
- Fits heads 23.5 to 24 inper Kiierr's spec tab
What holds it back
- Listed under K181878which describes only the 148 and 272
- No output measurement published
- $600 more than the 272 Premier
- 2-year warranty
- Guarantee refunds keep a 25 percent fee
- Kiierr's stored description still gives 30 minutes every other day
Capillus PRO S1 vs Kiierr 302 Ultra Flex: the numbers
Price, scores and rank, then only the specs that differ. Green marks the side with more.
- Safety listingsCapillus MoreIEC 60825 class statedKiierrNone verifiable
- WarrantyCapillus More3 YearsKiierr2 Years
Same on both
- Hair capDevice type
- Red (620-680 nm)Wavelength bands
- Not measuredMeasured irradiance
- Not listedClaimed irradiance
- Registered or listed onlyFDA status
- Detachable battery packPower
- 5-10 minSession length
- Not listedDimensions
- Not listedWeight
We earn a commission if you buy through these links. It never changes a score.
Not sold on either one?
The top-scored and the cheapest other pick from each brand.
More from Capillus 6 scored in Laser Hair Growth Caps & Helmets
What’s different
- FDA status: 510(k) cleared, not Registered or listed only
Pick it ifVerification matters7vs2an FDA 510(k) clearance only on the PRO 272
What’s different
- FDA status: Not stated, not Registered or listed only
- Warranty: 60 Days, not 3 Years
Pick it ifValue matters5vs4
More from Kiierr 4 scored in Laser Hair Growth Caps & Helmets
What’s different
- FDA status: 510(k) cleared, not Registered or listed only
- Session length: Over 20 min, not 5-10 min
Pick it ifVerification matters7vs2an FDA 510(k) clearance only on the 272 Premier
What’s different
- FDA status: 510(k) cleared, not Registered or listed only
- Session length: Over 20 min, not 5-10 min
Pick it ifVerification matters7vs2an FDA 510(k) clearance only on the 148 Pro
Capillus PRO S1 vs Kiierr 302 Ultra Flex: common questions
Is the Capillus PRO S1 better than the Kiierr 302 Ultra Flex?
On our scores, the Capillus PRO S1 is ahead, 6.1 against 5.2. The Capillus PRO S1 leads on warranty & support (6 against 4) and wavelength spec (10 against 9).
Which is cheaper, the Capillus PRO S1 or the Kiierr 302 Ultra Flex?
The Kiierr 302 Ultra Flex, at $1,799 against $2,499: $700 less.
Which has more safety listings, the Capillus PRO S1 or the Kiierr 302 Ultra Flex?
The Capillus PRO S1. The Capillus PRO S1 lists IEC 60825 class stated; the Kiierr 302 Ultra Flex lists none.
Which has the longer warranty, the Capillus PRO S1 or the Kiierr 302 Ultra Flex?
The Capillus PRO S1: 3 Years, against 2 Years.
What do owners say about the Capillus PRO S1 and the Kiierr 302 Ultra Flex?
Across 4 independent sources scored for both, the Capillus PRO S1 is ahead on Reddit and Google; YouTube and Amazon are level.
More laser hair growth caps & helmets comparisons
More head-to-heads with these two, plus the full brand comparison.
Scores calculated 8 October 2026 · Products excluded where fewer than two independent sources cover them · · How we score