Kiierr Hair Growth Reviews 

My husband purchased the Kiierr hair growth system on 4/10/22 and I have noticed to my surprise that it has helped my hair fill in sparse areas on my head. I am very pleased and will continue to use this product for as long as I can. When your hair looks better, you feel better too. Diane McKinney

I was very impressed with how responsive the company was. I initially ordered the wrong model number and they straighten this out immediately!
Was very impressed with the quality.

The company Kiierr is honest, helpful and transparent. Product working well. Easy to use and easy to charge. I like the carry case too

Great customer service. My question and resolution were taken care of quickly. I have have always gotten a quick response to any concerns. I have been using the cap for about 5 months and auto subscribe to the hair vitamins. I'm definitely starting to notice a difference.

I just started using it and am excited to see the results. I have tried all kinds of pills and creams and have had no luck.

I did a lot of research before purchasing. I liked the way Kiierr presented itself and offered a growth guarantee. It took a little bit of time to get my cap and it felt like I was in limbo for a little bit but once I got confirmation that it was shipping, it came in the two days. I had some confusion with the warranty and the extended warranty with regards to the refurbished model.

Easy to use and supportive information available to keep you accountable to your commitment. The before and after pictures really help you see a difference that otherwise you may miss

Website well laid out and understood. Shipping was quick.

Have noticed stands growing and seeing a little more growth from stubble

Kiierre's customer service is outstanding , exceeds most companies I have ever dealt with. in addition their products are high quality, and dependable. I have a laser cap that has helped me tremendously, and plan to purchase a red light mask also. You won't be disappointed . !

I am absolutely impressed with kiierr cap! I got the dual wave 312 cap and I am so impressed with the quality of the cap.
This review comes from someone who tried everything from natural treatments to medications. Natural treatments and medications all are inconvenient and mess up your hair quality after application (minoxidil gives hair a dry feel, and rosemary gives it an oily feel) while kiierr cap is so convenient and easy to use! You can still keep your hair styled and yet treat it at the same time.
I found it a bit pricy but for the quality (you’ll know what I’m talking about when you actually have it in your hands) and science behind it I decided to invest.
For my case, I could try the cap as hair loss wasn’t severe but it was bad enough that I can see where it’s heading. I noticed less shedding in the first week of use and now it’s been three weeks but obviously I’m so excited to see results in 6 months. I’ll post a review once it’s all done

Product came as advertised. Hat appears to be of heavy duty fabric. Lasers and battery work as intended. Fits snug on head covering all problem areas including temples.

I’ve used the Kierr Cap for years (on and off), and I can honestly say it works for me when I’m consistent. I’ve seen noticeable new hairs come in and overall my hair looks healthier. The cap is comfortable, doesn’t feel like a hassle, and it’s super convenient to bring on trips! I've had my hair dresser comment SO Many times about new hair I have coming in, and its always when I keep on a normal schedule with my cap. Not sure if this is due to the cap, but my scalp always feels really good after using it too!

I started using the 302 Ultra flex laser hair growth cap from Kiierr in July 2025. It has significantly improved my hair density after six months of use. I had been loosing hair density for years and it was now obvious on the top and back of the head. The improvement was noticeable after 2-3 months. To be noted, there was a hiatus in my treatment for over a month during fall because I decided not to bring the cap on a long trip. After asking Kiierr if this would be a problem, I had been adviced that stopping one month occasionally would not impact treatment on the long run if the treament is used dilligently the rest of the time. My experience proves they were right. The aftersale service at Kiierr is truly oustanding. They reply very quickly and with much details to each and every query. The treatment is just 5 minutes per day and one can still keep busy wearing the cap during those 5 minutes so it’s really not a burden at all to have to do it daily. I highly recommend these caps to anyone who is looking to improve hair coverage and density. With me for sure they got a customer for life.

The email communication was timely so that was good. Product satisfaction is average due to the head gear does not fit well (small) and to get a larger size it cost additional

I purchased their new 312 dual wave cap. Product came on time. Workmanship is top! Lasers and LEDs look well-manufactured on the device. Came with a nice little hat too! We will see if it works in 7 months!

This is a game changer! I honestly never thought I’d love my hair again.

I have been using the Kierr cap since early 2019. I was in menopause and noticing hair loss and read the science and decided to give it a try. I could not be happier with the results over these last years. I am a regular user and the cap lasts for years! I couldn’t be happier with the results.

It was easy to order the 272 cap and received the shipment in a timely manner. As for the cap, it has only been over a week and I have noticed tiny baby hairs where there hasn't been hair for a while. It looks very promising and I'm eager to see the results in 3-6 months.

I’ve struggled with female pattern balding my entire life and, honestly, I had almost given up hope. I decided to invest in the Kiierr Laser Cap and have been using it alongside topical minoxidil. For the first time ever, I am actually seeing real regrowth. It’s not an overnight miracle—you have to be consistent—but this combination is the only thing that has ever moved the needle for me. If you’ve dealt with thinning for years like I have, I highly recommend giving this a try. It’s been a total game-changer for my confidence.