# memory keeper vs やさしいバッテリー

The clearest difference is update cadence: memory keeper at every 6 weeks against やさしいバッテリー's every 6 months. memory keeper also leads on iOS requirement (8.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

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

memory keeper ships an update every 6 weeks, やさしいバッテリー every 6 months. The most recent releases landed on October 13, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | memory keeper | やさしいバッテリー |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 6 months |
| Monetization | Free | — |
| Size | 35 MB | 16 MB |
| Requires iOS | **8.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SB C&S Corp.](https://appshunter.io/developer/914438849) | [Takanari Yamazaki](https://appshunter.io/developer/1805445250) |

## What reviewers say

### memory keeper

[App page](https://appshunter.io/ios/app/memory-keeper/id1058280284)

Easily back up and manage data from your iPhone or iPad without needing the cloud or a PC. Browse and play photos, videos, music, and documents stored on a microSD card. It also functions as external storage when connected to a computer.

**Highlights:** Easy iPhone/iPad data backup, Browse and play microSD card content, Sync photos and files with PC, Fast app startup, One-touch backup and restore

**Features:** macOS Compatibility

**In-app purchases:** none


### やさしいバッテリー

[App page](https://appshunter.io/ios/app/id6761091840)

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

**In-app purchases:** none


## Frequently asked questions

### Is memory keeper free?

memory keeper is free to download, with no in-app purchases.

### Is やさしいバッテリー free?

やさしいバッテリー is free to download, with no in-app purchases.

### Do memory keeper or やさしいバッテリー have ads?

Neither memory keeper nor やさしいバッテリー shows ads.

### Which is updated more often, memory keeper or やさしいバッテリー?

memory keeper ships an update every 6 weeks, and やさしいバッテリー every 6 months. Most recently, memory keeper was updated on October 13, 2026 and やさしいバッテリー on October 16, 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.*