# O vs Gray Hair Tracker

The clearest difference is device support: O at 3 against Gray Hair Tracker's 1. On price, ads, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. O sells 2 in-app purchases, starting at $2.99 per month and Gray Hair Tracker sells 3 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | O | Gray Hair Tracker |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | — |
| Size | 49 MB | 86 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 12+ | 17+ |
| Developer | [Morson Japan](https://appshunter.io/developer/496417616) | [Fatih Erdogan](https://appshunter.io/developer/1526494037) |

## What reviewers say

### O

[App page](https://appshunter.io/ios/app/o-trainer/id6443540195)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プレミアムプラン（１ヶ月） | $2.99 | per month |
| 広告を削除 | $2.99 | one-time |


### Gray Hair Tracker

[App page](https://appshunter.io/ios/app/gray-hair-tracker/id6784965471)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $2.99 | per 7 days |
| Monthly | $9.99 | per month |
| Annual | $17.99 | per year |


## Frequently asked questions

### Is O free?

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

### Is Gray Hair Tracker free?

Gray Hair Tracker is free to download, with in-app purchases available.

### Do O or Gray Hair Tracker have ads?

Neither O nor Gray Hair Tracker 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.*