# Bestmath Clock vs O' Good

The clearest difference is in-app purchases: Bestmath Clock at none against O' Good's 2. Bestmath Clock also leads on ads (none vs shown) and iOS requirement (10.3 vs 15.6). O' Good's advantage is update cadence (every 3 weeks vs every 9 months). On price and device support there is nothing between them.

Both are free to download. O' Good sells 2 in-app purchases, starting at $3.99 per month. Bestmath Clock asks for nothing beyond the download.

Bestmath Clock ships an update every 9 months, O' Good every 3 weeks. The most recent releases landed on September 18, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Bestmath Clock | O' Good |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 9 months | **Every 3 weeks** |
| Size | 139 MB | 65 MB |
| Requires iOS | **10.3** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nat Benjarpornbanyat](https://appshunter.io/developer/982158754) | [WeiJia Tech Co., Ltd.](https://appshunter.io/developer/6776768203) |

## What reviewers say

### Bestmath Clock

[App page](https://appshunter.io/ios/app/bestmath-clock/id1305155416)

**In-app purchases:** none


### O' Good

[App page](https://appshunter.io/ios/app/o-good/id6758224135)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| O' Good VIP | $3.99 | per month |
| O' Good VIP | $29.99 | per year |


## Frequently asked questions

### Is Bestmath Clock free?

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

### Is O' Good free?

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

### Do Bestmath Clock or O' Good have ads?

O' Good shows ads; Bestmath Clock does not.

### Which is updated more often, Bestmath Clock or O' Good?

Bestmath Clock ships an update every 9 months, and O' Good every 3 weeks. Most recently, Bestmath Clock was updated on September 18, 2026 and O' Good on September 19, 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.*