# SpO2 Watcher vs COPD Tracker Diary

The clearest difference is price: COPD Tracker Diary at Free against SpO2 Watcher's $0.99. COPD Tracker Diary also leads on device support (4 vs 2) and iOS requirement (15.5 vs 18). SpO2 Watcher's advantage is in-app purchases (none vs 14). On ads there is nothing between them.

COPD Tracker Diary is free to download; SpO2 Watcher costs $0.99 up front. COPD Tracker Diary sells 14 in-app purchases, starting at $4.95 per month. SpO2 Watcher asks for nothing beyond the download.

## The numbers

| Metric | SpO2 Watcher | COPD Tracker Diary |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Monetization | Paid | — |
| Size | 8 MB | 199 MB |
| Requires iOS | 18 | **15.5** |
| Devices | iPhone, Apple Watch | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 12+ |
| Developer | [ESCAPADE GLOBAL PRIVATE LIMITED](https://appshunter.io/developer/1207530175) | [Digital Therapeutics](https://appshunter.io/developer/1721663167) |

## What reviewers say

### SpO2 Watcher

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

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


### COPD Tracker Diary

[App page](https://appshunter.io/ios/app/copd-tracker-diary/id6761026981)

**Features:** macOS Compatibility, Siri integration, Apple Watch app, iMessage stickers, Vision Pro support

**In-app purchases (14)**

| Purchase | Price | Billing |
| --- | --- | --- |
| steady pass | $4.95 | per month |
| weather max | $9.99 | per 3 months |
| carey ai max | $19.99 | per month |
| smart pass | $19.99 | per year |
| smart pass | $24.99 | per year |
| carey ai ultra | $29.99 | per month |
| limited sale | $34.99 | per year |
| your free pass | $39.99 | per year |
| select pass | $44.99 | per year |
| Yearly Trial | $44.99 | per year |
| 7-Day Trial | $49.99 | per year |
| store credit | $0.99 | one-time |
| carey ai credits | $8.99 | one-time |
| lifetime upgrade | $119.99 | one-time |


## Frequently asked questions

### Is SpO2 Watcher free?

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

### Is COPD Tracker Diary free?

COPD Tracker Diary is free to download, with in-app purchases available.

### Do SpO2 Watcher or COPD Tracker Diary have ads?

Neither SpO2 Watcher nor COPD Tracker Diary shows ads.

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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.*