NanoBattery
Giovanni Outerleys Utilities iPhoneiPadiPod touchApple Watch
NanoBattery is a free Utilities app for iPhone and iPad by Giovanni Outerleys. Requires iOS 17.6. Updated January 29, 2026.
- Price
- Free
- on the App Store
- Size
- 16 MB
- Age 4+
- Updated
- Jan 29
- 2026 · v1.0
Screenshots
About NanoBattery
NanoBattery is the essential utility for your Apple Watch. Stop guessing how much power is left on your wrist. NanoBattery seamlessly syncs your Apple Watch battery level to your iPhone, keeping you informed at a glance. Designed with a sleek "Black & Yellow" aesthetic perfect for OLED screens, NanoBattery feels right at home on your modern iOS device. KEY FEATURES: • Instant Monitoring: Check your Watch battery level directly from the app dashboard. • Smart Widgets: Add beautiful widgets to your Home Screen and Lock Screen to track power levels without unlocking your phone. • Dynamic Island & Live Activities: Keep an eye on your battery in real-time with support for the latest iOS features. • Custom Alerts: Receive a notification on your iPhone when your Watch battery drops below a specific threshold (e.g., 20%). • Battery-Friendly: Uses efficient background refresh technology to sync data without draining your device. HOW IT WORKS: NanoBattery uses background app refresh to periodically fetch data from your Watch (typically every 15-20 minutes) or instantly when you open the app or tap the widget. PRIVACY FIRST: No data collection, no tracking. Your battery data stays between your devices. Download NanoBattery today and never let your Watch run out of power unexpectedly!
App privacy
The developer, Giovanni Outerleys, reported these privacy practices to Apple.
Data Not Collected
The developer does not collect any data from this app.
Alternatives to NanoBattery
Looking for apps like NanoBattery? Here are 6 similar apps on the App Store.
-
BatteryShare: Remote Sync
-
Universe Kaleidoscope
-
WristGlint: Phone Battery
-
VoltLog: Battery Logs
-
Whosit: A Contact Cleanup Tool
-
Netron
| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| NanoBattery | – | Free | January 29, 2026 | |
| BatteryShare: Remote Sync | – | Free | Apr 30, 2026 | Compare |
| Universe Kaleidoscope | – | Free | Jul 22, 2025 | Compare |
| WristGlint: Phone Battery | – | Free | Oct 11, 2026 | Compare |
| VoltLog: Battery Logs | – | Free | Jun 11, 2026 | Compare |
| Whosit: A Contact Cleanup Tool | – | Free | Aug 6, 2025 | Compare |
| Netron | – | Free | Oct 6, 2025 | Compare |
Compare NanoBattery with the top alternatives: ratings, updates, ASO score and keyword gaps →