Reviews show a mix of outcomes for Kiierr devices: many customers praise responsive support, straightforward ordering, and some report visible regrowth. Several reviewers highlight easy setup and comfortable fit, while recurring negatives concern battery failures, processing or delivery delays, and inconsistent results for some users. If you consider a purchase, check warranty and battery replacement terms, document progress with photos for guarantee claims, and expect some variability in individual outcomes. For concerns about fit or device failure, contact support promptly and confirm refund or replacement policies before buying.
Examples from available reviews (Dec 2021 – Feb 2026).
Cap produced noticeable regrowth after four months on treated spot.
“I have been using cap for 4 months and have about 1.5” of hair on the once bald spot!..”
Battery failed after ten months and user discarded the cap due to no results.
“The battery died 10 months later.”
Product may have slowed hair loss; company provided supportive customer service.
“They stand by their product.”
Cap arrived quickly and is more comfortable and convenient to wear.
“Arrived within 4 days of order.”
Most reviewers report responsive customer support, troubleshooting help and refunds when needed; a small share report unresolved or delayed cases.
Customers reference financing, rebates and a money-back or growth guarantee; a few dispute added fees (e.g., battery replacement) or narrow refund terms.
Users commonly find the caps comfortable and easy to use; frequent minor complaints involve a tethered battery pack and the prescribed treatment time.
Reports are mixed: several reviewers describe visible regrowth and comfortable fit, while others note slow or no results and battery or fit failures.
Many reviewers note timely shipping and proactive order updates; several also report delays in processing or occasional non-response from the seller.
Most reviewers give a positive overall assessment, citing support, usability and some regrowth; a minority report disappointing outcomes or service gaps.
For each review, the core experience based on original source reviews.
Sources: Trustpilot (40) · Collected.reviews (1) · Quotes shortened · As of: February 2026
I have been dealing with hair loss for years now, but a friend recommended Kiieerr laser cap and it's been working wonders. I can't believe how much fuller my hair has become and the best part is that I'm not as self conscious as before. I was so skeptical about this product when I first saw it, but after reading the reviews on their website, I figured I had nothing to lose. I’m so happy that I decided to give it a try. In addition, the customer service is fantastic! They also shipped my order immediately! I'll recommend this company to anyone! Thanks so much!
This page combines submitted experiences with public reviews from platforms such as Google, Trustpilot, etc. Recurring points are summarized without changing the content of reviews.
Kiierr is a company that sells at-home low-level laser therapy (LLLT) caps and related devices aimed at addressing hair thinning. Its products are marketed for consumer use with online ordering, warranty options, and customer support channels. Consumers researching Kiierr typically look for device effectiveness, battery and fit details, shipping timelines, and the company’s return or guarantee policies.