# ZappID vs CheckOn

The clearest difference is update cadence: ZappID at every 4 days against CheckOn's every 16 months. 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.

ZappID ships an update every 4 days, CheckOn every 16 months. The most recent releases landed on September 15, 2026 and March 26, 2026 respectively.

## The numbers

| Metric | ZappID | CheckOn |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 16 months |
| Size | 11 MB | 10 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Fredrik Petersson](https://appshunter.io/developer/555276018) | [hernando oviedo](https://appshunter.io/developer/1457905029) |

## What reviewers say

### ZappID

[App page](https://appshunter.io/ios/app/zappid/id1455029820)

**Features:** macOS Compatibility

**In-app purchases:** none


### CheckOn

[App page](https://appshunter.io/ios/app/checkon/id1542738777)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ZappID free?

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

### Is CheckOn free?

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

### Do ZappID or CheckOn have ads?

Neither ZappID nor CheckOn shows ads.

### Which is updated more often, ZappID or CheckOn?

ZappID ships an update every 4 days, and CheckOn every 16 months. Most recently, ZappID was updated on September 15, 2026 and CheckOn on March 26, 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.*