# Battery Watcher vs MySensor²

The clearest difference is ratings volume: Battery Watcher at 340 against MySensor²'s 4. MySensor²'s advantage is rating (4.8 vs 4.5). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Battery Watcher sells 1 one-off in-app purchase and MySensor² sells 4 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

MySensor² holds the better App Store score, 4.8 against 4.5. That said, the two scores are not equally well evidenced: Battery Watcher has 340 ratings behind it against 4, so its average is the more settled of the two.

Battery Watcher ships an update fortnightly, MySensor² monthly. The most recent releases landed on November 1, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | Battery Watcher | MySensor² |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (340 ratings)](https://appshunter.io/ios/app/battery-watcher/id987285213/reviews) | **[4.8 (4 ratings)](https://appshunter.io/ios/app/mysensor-bike-sensor-battery/id6504740377/reviews)** |
| Number of ratings | **340** | 4 |
| Positive reviews | 70.7% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Monthly |
| Monetization | Free with in-app purchases | Freemium |
| Size | 2 MB | 28 MB |
| Requires iOS | 18.6 | **17.5** |
| Devices | iPhone, Apple Watch | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Slackerz Inc](https://appshunter.io/developer/727226094) | [兴华 范](https://appshunter.io/developer/440983944) |

## What reviewers say

### Battery Watcher

[App page](https://appshunter.io/ios/app/battery-watcher/id987285213)

Monitor your iPhone's battery status directly from your Apple Watch. View current levels, historical data, and receive alerts for a full charge. Perfect for quick checks without needing your phone.

**Highlights:** iPhone battery status on Apple Watch, Watch face complications, 24-hour battery history, Visual charge history graph, Full charge alerts

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Battery Watcher Premium | $1.99 | one-time |

**What reviewers like**

- 👍 Clean and intuitive interface
- 🎯 Accurate battery percentage tracking
- ⌚ Seamless Apple Watch integration
- 🚀 Minimal battery drain on device
- 📊 Battery history and graphing features

**What reviewers complain about**

- 🐛 Frequent synchronization issues between iPhone and Watch
- 🔄 App requires manual refresh to show current data
- ⏰ Inaccurate time displays
- 🚫 Premium features feel limited or underwhelming
- 📉 Battery percentage discrepancies between app and device

**Reported bugs**

- App fails to communicate with iPhone from Watch
- Battery graphic jumps out of place on iPhone app
- Complication doesn't update without opening app
- Inaccurate battery percentage readings
- App disconnects from Watch frequently

**Requested features**

- Low battery mode functionality
- Battery percentage viewing on iPhone (currently watch-only)
- Custom notification alerts at user-defined battery percentages
- User-configurable logging intervals for battery tracking
- Settings menu to customize watch display and disable text clutter


### MySensor²

[App page](https://appshunter.io/ios/app/mysensor-bike-sensor-battery/id6504740377)

Effortlessly monitor the battery levels of all your cycling sensors in one place. View status directly from your home screen or Apple Watch with convenient widgets. Avoid mid-ride surprises and ensure your gear is always ready.

**Highlights:** All sensor batteries in one view, Power meter monitoring, Heart rate monitor support, Speed and cadence sensor tracking, Electronic shifter battery status, Home screen widgets, Apple Watch Stack widget

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium (Weekly) | $2.99 | per 7 days |
| Premium (Monthly) | $6.99 | per month |
| Premium (Annual) | $19.99 | per year |
| Premium (Lifetime) | $39.99 | one-time |


## Frequently asked questions

### Is Battery Watcher free?

Battery Watcher is free to download, with in-app purchases available.

### Is MySensor² free?

MySensor² is free to download, with in-app purchases available.

### Which has better reviews, Battery Watcher or MySensor²?

MySensor² is rated higher. Battery Watcher averages 4.5 out of 5 from 340 ratings, while MySensor² averages 4.8 from 4 ratings.

### Do Battery Watcher or MySensor² have ads?

Neither Battery Watcher nor MySensor² shows ads.

### Which is updated more often, Battery Watcher or MySensor²?

Battery Watcher ships an update fortnightly, and MySensor² monthly. Most recently, Battery Watcher was updated on November 1, 2026 and MySensor² on November 8, 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.*