# O vs A

The clearest difference is in-app purchases: O at none against A's 6. O also leads on iOS requirement (15.6 vs 17.0). A's advantage is ads (none vs shown) and update cadence (monthly vs every 8 months). On price and device support there is nothing between them.

Both are free to download. A sells 6 in-app purchases, starting at $9.99 per month. O asks for nothing beyond the download.

O ships an update every 8 months, A monthly. The most recent releases landed on September 12, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | O | A |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 8 months | **Monthly** |
| Size | 26 MB | 19 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Albert Mungochi](https://appshunter.io/developer/1724993311) | [Forwa Elade Wunde](https://appshunter.io/developer/1685241344) |

## What reviewers say

### O

[App page](https://appshunter.io/ios/app/o-level-physics-revision/id6740166171)

**Features:** macOS Compatibility

**In-app purchases:** none


### A

[App page](https://appshunter.io/ios/app/a-level-physics-plus/id6746802225)

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month | $9.99 | per month |
| 6 Months | $19.99 | per 6 months |
| 1 Year | $29.99 | per year |
| 1500 | $0.99 | one-time |
| 3500 | $1.99 | one-time |
| 9000 | $3.99 | one-time |


## Frequently asked questions

### Is O free?

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

### Is A free?

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

### Do O or A have ads?

O shows ads; A does not.

### Which is updated more often, O or A?

O ships an update every 8 months, and A monthly. Most recently, O was updated on September 12, 2026 and A on September 8, 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.*