# Stillness Watch vs SpO2 Watcher

The clearest difference is update cadence: SpO2 Watcher at every 2 months against Stillness Watch's every 6 months. SpO2 Watcher also leads on chart position (#184 vs unranked). Stillness Watch's advantage is iOS requirement (16.0 vs 18). On price, ads, in-app purchases and device support there is nothing between them.

Stillness Watch costs $0.99 and SpO2 Watcher $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Stillness Watch ships an update every 6 months, SpO2 Watcher every 2 months. Both last shipped on October 25, 2026.

## The numbers

| Metric | Stillness Watch | SpO2 Watcher |
| --- | --- | --- |
| Price | $0.99 | $0.99 |
| Positive reviews | — | 25.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 months** |
| Monetization | — | Paid |
| Best chart rank | — | **#184** |
| Size | 4 MB | 8 MB |
| Requires iOS | **16.0** | 18 |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Tocapp Games S.L.](https://appshunter.io/developer/1382683382) | [ESCAPADE GLOBAL PRIVATE LIMITED](https://appshunter.io/developer/1207530175) |

## What reviewers say

### Stillness Watch

[App page](https://appshunter.io/ios/app/stillness-watch-focus-timer/id6670392801)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### SpO2 Watcher

[App page](https://appshunter.io/ios/app/spo2-watcher/id6756836222)

**Currently charting:** #184 Top Paid · Health & Fitness (US App Store)

This utility app restores blood oxygen level insights to your Apple Watch. It retrieves data from HealthKit and displays it on your watch face and dashboard, offering real-time readings and historical trends. Designed for privacy, your data remains on your device.

**Highlights:** Re-enable watch visibility for SpO2, Real-time blood oxygen dashboards, Advanced watch complications, 24-hour interactive history graph, Automatic background sync, 30-day trend analysis, On-device data storage

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Stillness Watch free?

Stillness Watch costs $0.99, with no in-app purchases.

### Is SpO2 Watcher free?

SpO2 Watcher costs $0.99, with no in-app purchases.

### Do Stillness Watch or SpO2 Watcher have ads?

Neither Stillness Watch nor SpO2 Watcher shows ads.

### Which is updated more often, Stillness Watch or SpO2 Watcher?

Stillness Watch ships an update every 6 months, and SpO2 Watcher every 2 months. Most recently, Stillness Watch was updated on October 25, 2026 and SpO2 Watcher on October 25, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*