# Vital Science by Biostrap — user reviews

> 3 indexed App Store user reviews of Vital Science by Biostrap by Biostrap, rated 3.00/5 from 6 ratings.

- Source: https://appshunter.io/ios/app/vital-science-by-biostrap/id1669292151/reviews
- App overview in markdown: https://appshunter.io/ios/app/vital-science-by-biostrap/id1669292151.md
- Rating breakdown: 5★ 3 · 4★ 0 · 3★ 0 · 2★ 0 · 1★ 3

## Most critical reviews (3 lowest-rated)

### 1/5 — App doesn't work, nonexistent support

*2025-03-27*

The app stopped syncing and storing data properly.

Also I emailed their support about the band itself over a month ago and still haven't gotten a reply.

### 1/5 — App issues

*2025-03-25*

All of a sudden the kairos stopped syncing with the app for iPhone and then I’ve been unable to sign in the app.

### 1/5 — Not good at all

*2023-10-14*

I am part of a UK trial of this product, and have checked what I am about to say with colleagues on the trial. This product is in my opinion, woeful. I sat writing at my desk for a few hours and it tracked about 20k steps! I read a book in bed, another few hundred steps. So I was losing confidence, and then here comes the big one….

The app gives you a sleep score. I wake up, open the app and it starts calculating. Let’s say the score is 95. A few hours later I check it again and the score is 100 and the app says I woke up 40 mins after I did, and had done all of the above! This is consistently happening, a colleague has told me they have given up manually re-calibrating it. 

So unlike Whoop or Apple Watch I have zero trust in the very unattractive biostrap (people say it looks like a tag someone gets on prison release) and what I have found to be misleading app in my opinion.

Pay a bit extra and go with Whoop…or work out how to read accurately Apple Watch or similar readings. Mine is now happily gathering dust in the drawer after a months use.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-05.*