Kiierr Hair Growth Devices Full Review
At a glance
148 Pro
0% at Entry Cap median ($799)
Diodes
148
Wavelength
650 nm
Session
30 min
Weekly
105 min
272 Premier
0% at Mid Cap median ($1,199)
Diodes
272
Wavelength
650 nm
Session
30 min
Weekly
105 min
272 MD Elite
33% above Mid Cap median ($1,199)
Diodes
272
Wavelength
650 nm
Session
30 min
Weekly
105 min
302 MD Ultra Flex
13% above High Cap median ($1,599)
Diodes
302
Wavelength
650 nm
Session
6 min
Weekly
42 min
312 MD Dual Flex
10% above Flagship median ($1,999)
Diodes
312
Wavelength
Dual-wave
Session
6 min
Weekly
42 min
How Kiierr devices compare
| Feature | 148 Pro | 272 Premier | 272 MD Elite | 302 MD Ultra Flex | 312 MD Dual Flex |
|---|---|---|---|---|---|
| Ratings & Guarantee | |||||
| Rating | ★ 4.9(100 reviews) | ★ 4.9(100 reviews) | ★ 4.9(100 reviews) | ★ 4.9(100 reviews) | ★ 4.9(100 reviews) |
| Warranty | 2 yr | 2 yr | 2 yr | 2 yr | 2 yr |
| Money-back | 210 days | 210 days | 240 days | 210 days | 210 days |
| Price | |||||
| Price | $799 | $1,199 | $1,59933% above median | $1,79913% above median | $2,19910% above median |
| Current offer | Check offer → | Check offer → | Check offer → | Check offer → | Check offer → |
| Physical | |||||
| Form factor | Cap | Cap | Cap | Cap | Cap |
| Hands-free | Yes | Yes | Yes | Yes | Yes |
| Power & mobility | Battery | Battery | Battery | Battery | Battery |
| Wearable outside | Yes | Yes | Limited | Limited | Limited |
| Research Scores | |||||
| FDA clearedⓘ | ✅ Yes — 510(k) | ✅ Yes — 510(k) | ✅ Yes — 510(k) | ✅ Yes — 510(k) | ✅ Yes — 510(k) |
| Wavelengthⓘ | ✅ 650 nm | ✅ 650 nm | ✅ 650 nm | ✅ 650 nm | ❓ Not disclosed |
| Diode typeⓘ | ✅ Laser only | ✅ Laser only | ✅ Laser only | ✅ Laser only | ✅ Laser only |
| Irradianceⓘ | ❓ Not disclosed | ❓ Not disclosed | ❓ Not disclosed | ❓ Not disclosed | ❓ Not disclosed |
| Brand protocolⓘ | ❓ 30 min / Every other day | ❓ 30 min / Every other day | ❓ 30 min / Every other day | ❓ 6 min / Daily | ❓ 6 min / Daily |
| Weekly totalⓘ | ❓ 105 min/wk | ❓ 105 min/wk | ❓ 105 min/wk | ❓ 42 min/wk | ❓ 42 min/wk |
| Ideal dose (research)ⓘ | ⚠️ 105 min/wk | ⚠️ 105 min/wk | ⚠️ 105 min/wk | ✅ 42 min/wk | ✅ 42 min/wk |
| Device Specs | |||||
| Total diodes | 148 | 272 | 272 | 302 | 312 |
| Laser diodes | 148 | 272 | 272 | 302 | 312 |
| LED diodes | 0 | 0 | 0 | 0 | 0 |
| Power output | Not disclosed | Not disclosed | 1360 mW | Not disclosed | Not disclosed |
Customer sentiment
Sentiment analysis pending — check back soon.
Kiierr device reviews
Pros
- ✓148 laser diodes at 650 nm cap design (Kiierr specs / Innerbody)
- ✓cordless battery pack (Kiierr specs)
- ✓210-day money-back guarantee (Innerbody review)
Cons
- –30-min every other day = higher weekly time than 6-min caps (Kiierr vs Capillus protocols)
- –irradiance not disclosed (Kiierr tech sheet)
- –lower coverage than 272-diode caps (diode count comparison)
Diodes
148
Laser / LED
148L + 0 LED
Power
N/D
Wavelength
650 nm
Protocol
30 min / Every other day
Weekly
105 min
Warranty
2 yr
Guarantee
210-day
Pros
- ✓272 PureLaser™ diodes at 650nm: laser only, no LEDs • 1,360mW total power output • Cordless with portable battery • Fits discreetly under any hat • Dermatologist recommended • 7-month money-back guarantee • 2-year warranty
Cons
- –30-min sessions every other day • Not eligible for HSA/FSA • Customer pays return shipping on guarantee claims
Diodes
272
Laser / LED
272L + 0 LED
Power
N/D
Wavelength
650 nm
Protocol
30 min / Every other day
Weekly
105 min
Warranty
2 yr
Guarantee
210-day
Kiierr 272 MD Elite
Pros
- ✓272 medical-grade 650nm lasers, 1360mW (brand site)
- ✓30-min every other day cordless (brand site/reseller)
- ✓7-month growth guarantee 210–240 days (brand site)
- ✓fits up to 24.5" (brand site)
Cons
- –Irradiance not disclosed (brand site)
- –30-min session duration (brand site/reseller)
- –no dedicated hard case (brand site)
Diodes
272
Laser / LED
272L + 0 LED
Power
1360 mW
Wavelength
650 nm
Protocol
30 min / Every other day
Weekly
105 min
Warranty
2 yr
Guarantee
240-day
Kiierr 302 MD Ultra Flex
Pros
- ✓302 medical-grade 650nm laser diodes in flexible dome (brand site)
- ✓cordless rechargeable battery + controller (brand site)
- ✓FDA-cleared for androgenetic alopecia (brand site)
Cons
- –30-min per session (brand site)
- –irradiance not disclosed (brand site)
- –no hard storage case (brand site)
Diodes
302
Laser / LED
302L + 0 LED
Power
N/D
Wavelength
650 nm
Protocol
6 min / Daily
Weekly
42 min
Warranty
2 yr
Guarantee
210-day
Kiierr 312 MD Dual Flex
Pros
- ✓312 medical-grade 650nm laser diodes in dual-flex dome (brand site)
- ✓cordless rechargeable battery (brand site)
- ✓FDA-cleared MD-grade with extended growth guarantee (brand site)
Cons
- –30-min every other day = ~105 min/week (brand site)
- –no published irradiance/energy dose (brand site)
- –no hard storage case (brand site)
Diodes
312
Laser / LED
312L + 0 LED
Power
N/D
Wavelength
Dual-wave
Protocol
6 min / Daily
Weekly
42 min
Warranty
2 yr
Guarantee
210-day
Research behind the scores
| Study | What it found |
|---|---|
| Low-Level Laser Therapy for AGA — Liu et al. 2019 Liu et al., 2019 | Devices under 60 min/week showed ~64% stronger hair count results than higher-dose protocols. |
| RCT: 655 nm Red Light Therapy vs Sham Device — Lueangarun et al. 2021 Lueangarun et al., 2021 | FDA-cleared 655 nm laser cap produced significant hair count increase vs sham at 24 weeks. |
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