NanoBattery vs Qmi Flashlight
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
NanoBattery
This utility app provides real-time monitoring of your Apple Watch's battery level directly on your iPhone. It offers convenient widgets, custom alerts, and support for Dynamic Island and Live Activities to keep you informed without needing to check your watch.
- Instant Watch battery monitoring
- Home and Lock Screen widgets
- Dynamic Island and Live Activities support
- Custom low battery alerts
- Battery-efficient background sync
- Privacy-focused, no data collection
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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!
Qmi Flashlight
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Qmi Flashlight is a minimal, fast, and ad-free flashlight app for iPhone. Designed for moments when you need light instantly, with no distractions and no clutter. Key Features: - One-tap instant flashlight - Completely ad-free - No personal data collection - Clean and intuitive interface - Lightweight and battery-friendly Perfect For: - Finding things in the dark - Power outages and emergencies - Outdoor activities and camping - Users who hate ads If all you want is a flashlight that turns on immediately, Qmi Flashlight is made for you.
Screenshots
Verdict
The clearest difference is device support: NanoBattery at 3 against Qmi Flashlight's 1. On price, ads, in-app purchases and iOS requirement 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | NanoBattery | Qmi Flashlight |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, Apple Watch — better | iPhone |
| Requires iOS | 17.6 — better | 18.5 |
| Further details — not scored | ||
| Size | 16 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Giovanni Outerleys | CHEN SHANG LAN |
In-app purchases
NanoBattery
No in-app purchases
Qmi Flashlight
No in-app purchases









