Comparison

NanoBattery vs BatteryShare

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

NanoBattery

Features
Read full description

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!

About

BatteryShare

Features
Read full description

Keep an eye on your Mac’s battery right from your iPhone. BatteryShare securely syncs your Mac’s charge level, charging state, and time remaining over iCloud so you can check it at a glance, wherever you are. On your Mac, a lightweight menu bar app records battery status periodically and can start automatically at login. On your iPhone, a clean, glanceable dashboard shows the latest charging status, whether your Mac is charging, and estimated time until full or empty. You can even label your Mac for quick recognition. Features: • Check your Mac’s battery from your iPhone • Charge percentage with a color‑coded gauge • Charging vs. On Battery indicator • Estimated time until full or empty (when available) • Last synced time with a gentle stale‑sync reminder • macOS menu bar app that can automatically launch at login • Private by design: uses your iCloud account, no extra sign‑ups How it works: • Install BatteryShare on both your Mac and iPhone • Sign in to the same Apple ID and enable iCloud Drive • Your Mac periodically updates its battery status, and your iPhone shows the latest sync Privacy: BatteryShare uses iCloud to sync your data between your devices. Your battery information stays in your iCloud account no third‑party servers, no tracking. Requirements: • BatteryShare installed on both Mac and iPhone • iCloud is enabled on both devices • Same Apple ID signed in on both devices Note: Battery time estimates are provided by macOS and can vary based on usage.

Screenshots

NanoBattery4 screens
BatteryShare2 screens

Verdict

The call

The clearest difference is iOS requirement: NanoBattery at 17.6 against BatteryShare's 26.0. On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Scorecard1 real difference · 4 level
NanoBattery versus BatteryShare: the parameters behind the verdict, then further details
ParameterNanoBatteryBatteryShare
PriceFreeFree
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, Apple WatchiPhone, iPad, Mac
Requires iOS17.6 — better26.0
Further details — not scored
Size16 MB3 MB
Age rating4+4+
DeveloperGiovanni OuterleysJack Kroll

In-app purchases

None

NanoBattery

No in-app purchases

None

BatteryShare

No in-app purchases

Questions

Is NanoBattery free?
NanoBattery is free to download, with no in-app purchases.
Is BatteryShare free?
BatteryShare is free to download, with no in-app purchases.
Do NanoBattery or BatteryShare have ads?
Neither NanoBattery nor BatteryShare shows ads.

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