# USD Event Check vs Chimpa Learn

The clearest difference is update cadence: USD Event Check at every 3 months against Chimpa Learn's every 5 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

USD Event Check ships an update every 3 months, Chimpa Learn every 5 months. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | USD Event Check | Chimpa Learn |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 5 months |
| Size | 14 MB | 58 MB |
| Requires iOS | **11.4** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [University of San Diego](https://appshunter.io/developer/327884947) | [ERMETIX SRL](https://appshunter.io/developer/1035300725) |

## What reviewers say

### USD Event Check

[App page](https://appshunter.io/ios/app/usd-event-check-in/id863205012)

**Features:** macOS Compatibility

**In-app purchases:** none


### Chimpa Learn

[App page](https://appshunter.io/ios/app/chimpa-learn/id1042570632)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is USD Event Check free?

USD Event Check is free to download, with no in-app purchases.

### Is Chimpa Learn free?

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

### Do USD Event Check or Chimpa Learn have ads?

Neither USD Event Check nor Chimpa Learn shows ads.

### Which is updated more often, USD Event Check or Chimpa Learn?

USD Event Check ships an update every 3 months, and Chimpa Learn every 5 months. Most recently, USD Event Check was updated on October 26, 2026 and Chimpa Learn 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.*