# Battery Nudge vs Sentry Saver

The clearest difference is ads: Battery Nudge at none against Sentry Saver's shown. Sentry Saver's advantage is update cadence (every 10 days vs every 4 weeks). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

Battery Nudge ships an update every 4 weeks, Sentry Saver every 10 days. The most recent releases landed on October 14, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Battery Nudge | Sentry Saver |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/battery-nudge/id6784847164/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 4 weeks | **Every 10 days** |
| Monetization | Free | — |
| Size | 18 MB | 33 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Kymata Labs LLC](https://appshunter.io/developer/1896317609) | [Yuan-Yi Chang](https://appshunter.io/developer/784363421) |

## What reviewers say

### Battery Nudge

[App page](https://appshunter.io/ios/app/battery-nudge/id6784847164)

This utility app provides customizable alerts to remind you to charge your device before the battery runs out. Choose your preferred notification level, sound style, and quiet hours for a personalized charging reminder experience.

**Highlights:** Customizable battery level threshold, Multiple reminder styles (Calm, Firm, Emergency), Repeat reminders, Quiet hours for uninterrupted sleep, Light and dark themes, Offline functionality, no internet required

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Sentry Saver

[App page](https://appshunter.io/ios/app/sentry-saver/id6802057873)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Battery Nudge free?

Battery Nudge is free to download, with no in-app purchases.

### Is Sentry Saver free?

Sentry Saver is free to download, with no in-app purchases.

### Do Battery Nudge or Sentry Saver have ads?

Sentry Saver shows ads; Battery Nudge does not.

### Which is updated more often, Battery Nudge or Sentry Saver?

Battery Nudge ships an update every 4 weeks, and Sentry Saver every 10 days. Most recently, Battery Nudge was updated on October 14, 2026 and Sentry Saver on October 28, 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.*