# Cardio Display — user reviews

> 2 indexed App Store user reviews of Cardio Display by Mikhail Sereniti, rated 3.00/5 from 2 ratings.

- Source: https://appshunter.io/ios/app/cardio-display/id1576127724/reviews
- App overview in markdown: https://appshunter.io/ios/app/cardio-display/id1576127724.md
- Rating breakdown: 5★ 1 · 4★ 0 · 3★ 0 · 2★ 0 · 1★ 1

## Most critical reviews (2 lowest-rated)

### 1/5 — Disconnects after 25 seconds

*2021-12-19, version 1.2*

I was happy to find this app and it seemed to work well when I tried it out.  It displays my heart rate in large numbers on my iPhone so I can keep track of my heart rate while rowing.  Perfect, or so I thought, but then it started to disconnect after about half a minute and displays the “Open companion app” message.  I got the connection going again but the same thing happened.
I’m using an iPhone 13 and a series 5 watch.  Please improve the connectivity because it’s a really helpful app.

**Developer response:** Hello and thank you for your feedback. I will check out and fix that connection issue (planed in a week, but it may take up to a month)

### 5/5 — Simple and Effective

*2023-05-09*

This is the only app I can find that will display my HR in real-time. I have an Apple Watch SE, so mirroring is not supported. I like using this app the maintain HR zones during cardio.

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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 2026-06-10.*