# O2 Black vs Oops

The clearest difference is in-app purchases: O2 Black at none against Oops's 2. O2 Black also leads on iOS requirement (15.0 vs 18.0). Oops's advantage is update cadence (every 4 days vs every 7 months). On price, ads and device support there is nothing between them.

Both are free to download. Oops sells 2 in-app purchases, starting at $0.99 per month. O2 Black asks for nothing beyond the download.

O2 Black ships an update every 7 months, Oops every 4 days. The most recent releases landed on October 15, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | O2 Black | Oops |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 4 days** |
| Size | 153 MB | 7 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [FitPhilia](https://appshunter.io/developer/1178311498) | [Anton Litmansky](https://appshunter.io/developer/1818644150) |

## What reviewers say

### O2 Black

[App page](https://appshunter.io/ios/app/o2-black/id6754449354)

**Features:** macOS Compatibility

**In-app purchases:** none


### Oops

[App page](https://appshunter.io/ios/app/oops-treat-tracker/id6799032373)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Oops Premium(Monthly) | $0.99 | per month |
| Oops Premium (Yearly) | $9.99 | per year |


## Frequently asked questions

### Is O2 Black free?

O2 Black is free to download, with no in-app purchases.

### Is Oops free?

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

### Do O2 Black or Oops have ads?

Neither O2 Black nor Oops shows ads.

### Which is updated more often, O2 Black or Oops?

O2 Black ships an update every 7 months, and Oops every 4 days. Most recently, O2 Black was updated on October 15, 2026 and Oops on October 24, 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.*