# SPO2er: Blood Oxygen on Watch — user reviews

> 4 indexed App Store user reviews of SPO2er by Kevin Edwards, rated 4.80/5 from 6 ratings.

- Source: https://appshunter.io/ios/app/spo2er-blood-oxygen-on-watch/id6755498703/reviews
- App overview in markdown: https://appshunter.io/ios/app/spo2er-blood-oxygen-on-watch/id6755498703.md
- Rating breakdown: 5★ 5 · 4★ 1 · 3★ 0 · 2★ 0 · 1★ 0

## Most critical reviews (4 lowest-rated)

### 1/5 — Complication doesn’t show up.

*2026-01-14*

Developers complication doesn’t show up. App however does show historical data acquired from health.  Moot point if complication is unavailable on the watch. Emailed developer from  their website using generated email address from said site. Email bounced back undeliverable. Looks like  a loss of 99 cents uninstalled.

### 5/5 — Working as expected.

*2026-03-13*

Complication now showing and performing as expected.

**Developer response:** Complications won't automatically show up on their own.  You need to edit the watch face to add the complication.  We'll edit instructions to make this clear, but this is true with all complications.  Additionally, you need to be using a watch face that supports complications.  There are SPO2er complication styles for every face that supports complications, but some watch faces don't support any complications.

For email, they seem to be coming through on our end, and not sure if this was a temporary issue.

### 5/5 — Apple Watch 10 Complication

*2026-02-18*

The app works perfectly and have the Apple Watch complication back on a series 10!

### 5/5 — Better than Vitals

*2025-12-26*

I upgraded my watch to a new one that doesn’t show Blood Oxygen on the watch.  Now I can!   Even better I get history view and see low values.   Well done.

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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 2026-09-10.*