# Battery Watcher vs MySensor²

The clearest difference is ratings volume: Battery Watcher at 338 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 338 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 October 16, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Battery Watcher | MySensor² |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (338 ratings)](https://appshunter.io/ios/app/battery-watcher/id987285213/reviews) | **[4.8 (4 ratings)](https://appshunter.io/ios/app/mysensorbike-sensor-battery/id6504740377/reviews)** |
| Number of ratings | **338** | 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/mysensorbike-sensor-battery/id6504740377)

Effortlessly monitor the battery levels of all your cycling sensors, including power meters, heart rate monitors, and shifters, in one convenient app. Get quick access to battery status via desktop widgets or Apple Watch Stacks without needing to open the application.

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

**Features:** macOS Compatibility, Apple Watch app, Vision Pro 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 338 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 October 16, 2026 and MySensor² on September 30, 2026.

---

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