# ChronoGraph vs OneThing

The clearest difference is in-app purchases: ChronoGraph at none against OneThing's 3. OneThing's advantage is iOS requirement (13.0 vs 17). On price, ads and device support there is nothing between them.

Both are free to download. OneThing sells 3 in-app purchases, starting at $0.99 per month. ChronoGraph asks for nothing beyond the download.

## The numbers

| Metric | ChronoGraph | OneThing |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 4 days |
| Size | 1 MB | 46 MB |
| Requires iOS | 17 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [世尧 张](https://appshunter.io/developer/1558995772) | [建 徐](https://appshunter.io/developer/1736045881) |

## What reviewers say

### ChronoGraph

[App page](https://appshunter.io/ios/app/chronograph/id6754444396)

**Features:** macOS Compatibility

**In-app purchases:** none


### OneThing

[App page](https://appshunter.io/ios/app/onething-make-change/id6758565847)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| monthly member | $0.99 | per month |
| yearly member | $2.99 | per year |
| Life member | $6.99 | one-time |


## Frequently asked questions

### Is ChronoGraph free?

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

### Is OneThing free?

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

### Do ChronoGraph or OneThing have ads?

Neither ChronoGraph nor OneThing shows ads.

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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.*