# SpO2 Watcher vs Calometric

The clearest difference is price: SpO2 Watcher at $0.99 against Calometric's $14.99. SpO2 Watcher also leads on in-app purchases (none vs 1) and review sentiment (25% vs 0%). Calometric's advantage is update cadence (every 3 days vs every 2 months). On ads, monetization model and device support there is nothing between them.

SpO2 Watcher costs $0.99 and Calometric $14.99 up front. Calometric sells 1 one-off in-app purchase. SpO2 Watcher asks for nothing beyond the download.

SpO2 Watcher ships an update every 2 months, Calometric every 3 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | SpO2 Watcher | Calometric |
| --- | --- | --- |
| Price | **$0.99** | $14.99 |
| Positive reviews | **25.0% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 days** |
| Monetization | Paid | Paid |
| Best chart rank | **#184** | — |
| Size | 8 MB | 30 MB |
| Requires iOS | **18** | 26.0 |
| Devices | iPhone, Apple Watch | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [ESCAPADE GLOBAL PRIVATE LIMITED](https://appshunter.io/developer/1207530175) | [Ricardo Dantas Goncalves](https://appshunter.io/developer/1313280346) |

## What reviewers say

### 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


### Calometric

[App page](https://appshunter.io/ios/app/calometric-calorie-tracker/id6759844251)

Log your meals effortlessly using photos, voice, or barcode scanning. Track calories and macros with on-device intelligence and a privacy-focused design. Syncs across Apple devices and offers extensive customization.

**Highlights:** Photo meal scanning, Barcode scanning, Voice logging, Nutrition label OCR, On-device intelligence, Customizable goals, Apple Watch companion app

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 100 Cloud Scans | $4.99 | one-time |


## Frequently asked questions

### Is SpO2 Watcher free?

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

### Is Calometric free?

Calometric costs $14.99, and also offers in-app purchases.

### Do SpO2 Watcher or Calometric have ads?

Neither SpO2 Watcher nor Calometric shows ads.

### Which is updated more often, SpO2 Watcher or Calometric?

SpO2 Watcher ships an update every 2 months, and Calometric every 3 days. Most recently, SpO2 Watcher was updated on October 25, 2026 and Calometric on October 24, 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.*