# Battery Memo vs Oitayo

The clearest difference is update cadence: Oitayo at every 2 days against Battery Memo's every 10 days. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Battery Memo sells 1 one-off in-app purchase and Oitayo sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Battery Memo ships an update every 10 days, Oitayo every 2 days. The most recent releases landed on October 11, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Battery Memo | Oitayo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 10 days | **Every 2 days** |
| Size | 2 MB | 1 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [YUYA SATO](https://appshunter.io/developer/6786632085) | [合同会社JProduct](https://appshunter.io/developer/1887137543) |

## What reviewers say

### Battery Memo

[App page](https://appshunter.io/ios/app/battery-memo-aaaaa-inventory/id6788988014)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Devices | $2.99 | one-time |


### Oitayo

[App page](https://appshunter.io/ios/app/oitayo/id6793178359)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月額プラン | $1.99 | per month |
| 買い切り | $6.99 | one-time |


## Frequently asked questions

### Is Battery Memo free?

Battery Memo is free to download, with in-app purchases available.

### Is Oitayo free?

Oitayo is free to download, with in-app purchases available.

### Do Battery Memo or Oitayo have ads?

Neither Battery Memo nor Oitayo shows ads.

### Which is updated more often, Battery Memo or Oitayo?

Battery Memo ships an update every 10 days, and Oitayo every 2 days. Most recently, Battery Memo was updated on October 11, 2026 and Oitayo on October 14, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*