# Penn Ditti vs UDAEF

The clearest difference is update cadence: UDAEF at monthly against Penn Ditti's every 10 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.

Penn Ditti ships an update every 10 months, UDAEF monthly. The most recent releases landed on October 5, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Penn Ditti | UDAEF |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Monthly** |
| Size | 39 MB | 76 MB |
| Requires iOS | 15.8.4 | **15.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [The Trustees of the University of Pennsylvania](https://appshunter.io/developer/1227329498) | [Upper Darby Arts & Education](https://appshunter.io/developer/1796224726) |

## What reviewers say

### Penn Ditti

[App page](https://appshunter.io/ios/app/penn-ditti/id1555693534)

**Features:** macOS Compatibility

**In-app purchases:** none


### UDAEF

[App page](https://appshunter.io/ios/app/udaef/id6741925507)

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

**In-app purchases:** none


## Frequently asked questions

### Is Penn Ditti free?

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

### Is UDAEF free?

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

### Do Penn Ditti or UDAEF have ads?

Neither Penn Ditti nor UDAEF shows ads.

### Which is updated more often, Penn Ditti or UDAEF?

Penn Ditti ships an update every 10 months, and UDAEF monthly. Most recently, Penn Ditti was updated on October 5, 2026 and UDAEF on October 12, 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.*