# PowerDiag vs CellLog

The clearest difference is in-app purchases: PowerDiag at none against CellLog's 1. CellLog's advantage is update cadence (weekly vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. CellLog sells 1 one-off in-app purchase. PowerDiag asks for nothing beyond the download.

PowerDiag ships an update every 2 months, CellLog weekly. The most recent releases landed on November 5, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | PowerDiag | CellLog |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Size | 2 MB | 2 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [QIAN WANPENG](https://appshunter.io/developer/1896729435) | [Yoshifumi Sato](https://appshunter.io/developer/6780413827) |

## What reviewers say

### PowerDiag

[App page](https://appshunter.io/ios/app/powerdiag/id6770429306)

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

**In-app purchases:** none


### CellLog

[App page](https://appshunter.io/ios/app/celllog-lipo-battery-tracker/id6793566288)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CellLog Pro | $5.99 | one-time |


## Frequently asked questions

### Is PowerDiag free?

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

### Is CellLog free?

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

### Do PowerDiag or CellLog have ads?

Neither PowerDiag nor CellLog shows ads.

### Which is updated more often, PowerDiag or CellLog?

PowerDiag ships an update every 2 months, and CellLog weekly. Most recently, PowerDiag was updated on November 5, 2026 and CellLog on November 10, 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.*