# exam_calculate vs OSU

The clearest difference is in-app purchases: OSU at none against exam_calculate's 1. OSU also leads on ads (none vs shown). exam_calculate's advantage is update cadence (every 3 months vs every 7 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. exam_calculate sells 1 one-off in-app purchase. OSU asks for nothing beyond the download.

exam_calculate ships an update every 3 months, OSU every 7 months. The most recent releases landed on October 29, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | exam_calculate | OSU |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 months** | Every 7 months |
| Size | 7 MB | 31 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [KENTARO UME](https://appshunter.io/developer/764546905) | [eita nakagaichi](https://appshunter.io/developer/1814037621) |

## What reviewers say

### exam_calculate

[App page](https://appshunter.io/ios/app/exam-calculate/id1265876274)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AD Free | $0.99 | one-time |


### OSU

[App page](https://appshunter.io/ios/app/osu-ds/id6745809127)

**In-app purchases:** none


## Frequently asked questions

### Is exam_calculate free?

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

### Is OSU free?

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

### Do exam_calculate or OSU have ads?

exam_calculate shows ads; OSU does not.

### Which is updated more often, exam_calculate or OSU?

exam_calculate ships an update every 3 months, and OSU every 7 months. Most recently, exam_calculate was updated on October 29, 2026 and OSU on October 25, 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.*