SpO2 Watcher vs HRM Battery
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
SpO2 Watcher
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.
- 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
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RESTORE YOUR SPOβ INSIGHTS ON APPLE WATCH SPOβ Watcher is a specialized utility designed for users who want full visibility of their blood oxygen data directly on their wrist. While some devices may not display these readings natively, your sensor is still active and securely recording data to the Apple Health app. SPOβ Watcher acts as the essential bridge, retrieving that data from HealthKit and restoring it to your watch face and dashboard. β KEY FEATURES β β RE-ENABLE WATCH VISIBILITY If you lack a native on-device option to view your blood oxygen levels, our app provides the solution. It pulls the SpOβ data already stored in your HealthKit database and displays it instantly on your Apple Watch. β REAL-TIME DASHBOARDS View your latest blood oxygen percentage at a glance with high-contrast, easy-to-read designs optimized for clarity on the go. β ADVANCED WATCH COMPLICATIONS Personalize your watch face with our specialized "Four Corner" layout. See your current SpOβ value, exact time of measurement, and a smooth historical trend graph without needing to open your iPhone. β 24-HOUR INTERACTIVE GRAPH Visualize your daily fluctuations with a detailed 24-hour history line chart, helping you identify patterns in your respiratory wellness throughout your routine. β AUTOMATIC BACKGROUND SYNC Using intelligent observer queries, the app detects new scans as soon as they reach your Health app, ensuring your watch complications stay updated automatically. β 30-DAY TRENDS Dive deep into your history with comprehensive daily averages, highs, and lows to help you track your long-term wellness journey. β PRIVACY & SECURITY: YOUR DATA STAYS YOURS β We believe your health data is your most sensitive information. SPOβ Watcher is built with a Privacy-First architecture: β ON-DEVICE STORAGE: All your blood oxygen data is stored locally on your iPhone and Apple Watch. β NO CLOUD BACKENDS: Your data stays in the secure Apple Health database on your device. We do not have a backend; your data is never "in flight" to a third-party server. β END-TO-END ENCRYPTION: Your health information is encrypted whenever your device is locked. β NO DATA SELLING: We strictly follow Appleβs developer guidelines. Your health data is never shared with advertisers or data brokers. β WE DO NOT USE YOUR DATA β Your data belongs to you. SPOβ Watcher does not collect, store, or transmit your health information to any external location. The app simply requests permission to read "Oxygen Saturation" from the Apple Health app for the sole purpose of displaying it locally on your device. We have no access to your data, and we do not track your usage. β IMPORTANT DISCLAIMER β This app is intended for fitness and wellness purposes only and is not a medical device. It is not intended for the diagnosis of disease or other conditions, or in the cure, mitigation, treatment, or prevention of disease. Always seek the advice of a physician or other qualified health provider with any questions regarding a medical condition. β TECHNICAL REQUIREMENTS β β Requires Apple Watch Series 6 or later (excluding SE) with Blood Oxygen sensor. β Requires authorization to access Oxygen Saturation data in the Apple Health app.
HRM Battery
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Never head into a workout with a dead chest strap again. HRM Battery is a focused Apple Watch app that shows the battery level of your Bluetooth heart rate strap right on your wrist. BATTERY AT A GLANCE β’ Animated ring with battery percentage β’ Color-coded levels: green (good), orange (low), red (charge soon) β’ Haptic confirmation when the battery level is read LIVE HEART RATE β’ Current BPM next to battery status β’ Animated heartbeat indicator β’ Everything in one compact view WORKS WITH YOUR STRAP β’ Polar H10, H9, OH1 β’ Wahoo TICKR, TICKR FIT, TICKR X β’ Garmin HRM-Pro, HRM-Pro Plus, HRM-Dual β’ Any Bluetooth LE heart rate monitor that exposes battery data QUICK CONNECT β’ Finds nearby HR straps automatically β’ One-tap connection β’ Remembers your last device for quick reconnect PRIVACY FIRST β’ No account required β’ No data collection, zero analytics β’ No ads, no tracking β’ Everything stays on your Apple Watch Built for runners, cyclists, and anyone who relies on a chest strap and wants a quick battery check before training.
Screenshots
Verdict
The clearest difference is update cadence: HRM Battery at every 10 days against SpO2 Watcher's every 2 months. HRM Battery also leads on iOS requirement (16.0 vs 18). SpO2 Watcher's advantage is price ($0.99 vs $1.99). On ads, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
SpO2 Watcher costs $0.99 and HRM Battery $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
SpO2 Watcher ships an update every 2 months, HRM Battery every 10 days. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.
| Parameter | SpO2 Watcher | HRM Battery |
|---|---|---|
| Price | $0.99 β better | $1.99 |
| Positive reviews | 25.0% of reviews | β |
| Update frequency | Every 2 months | Every 10 days β better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | β |
| Devices | iPhone, Apple Watch | iPhone, iPad, Apple Watch β better |
| Requires iOS | 18 | 16.0 β better |
| Further details β not scored | ||
| Size | 8 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | ESCAPADE GLOBAL PRIVATE LIMITED | DAN URBANEK |
In-app purchases
SpO2 Watcher
No in-app purchases
HRM Battery
No in-app purchases
Questions
Is SpO2 Watcher free?
Is HRM Battery free?
Do SpO2 Watcher or HRM Battery have ads?
Which is updated more often, SpO2 Watcher or HRM Battery?
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