# TRA Mobile Application vs DDC Lecturio

The clearest difference is iOS requirement: TRA Mobile Application at 11.0 against DDC Lecturio's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

TRA Mobile Application ships an update every 18 months, DDC Lecturio every 19 months. The most recent releases landed on September 9, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | TRA Mobile Application | DDC Lecturio |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 18 months** | Every 19 months |
| Size | 47 MB | 117 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [WELA.ONLINE CORP.](https://appshunter.io/developer/1621972441) | [Lecturio GmbH](https://appshunter.io/developer/667474928) |

## What reviewers say

### TRA Mobile Application

[App page](https://appshunter.io/ios/app/tra-mobile-application/id1629374483)

**Features:** macOS Compatibility

**In-app purchases:** none


### DDC Lecturio

[App page](https://appshunter.io/ios/app/ddc-lecturio/id6450448826)

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

**In-app purchases:** none


## Frequently asked questions

### Is TRA Mobile Application free?

TRA Mobile Application is free to download, with no in-app purchases.

### Is DDC Lecturio free?

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

### Do TRA Mobile Application or DDC Lecturio have ads?

Neither TRA Mobile Application nor DDC Lecturio shows ads.

### Which is updated more often, TRA Mobile Application or DDC Lecturio?

TRA Mobile Application ships an update every 18 months, and DDC Lecturio every 19 months. Most recently, TRA Mobile Application was updated on September 9, 2026 and DDC Lecturio on September 27, 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.*