# Congress vs Trial Alert

The clearest difference is in-app purchases: Congress at none against Trial Alert's 1. Congress also leads on device support (5 vs 2). Trial Alert's advantage is iOS requirement (16.0 vs 26.0). On price, update cadence and ads there is nothing between them.

Both are free to download. Trial Alert sells 1 one-off in-app purchase. Congress asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 9 days. The most recent releases landed on November 6, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Congress | Trial Alert |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (30 ratings)](https://appshunter.io/ios/app/congress-39c3/id941205524/reviews)** | — |
| Number of ratings | **30** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 days | Every 9 days |
| Monetization | Free | — |
| Size | 38 MB | 1 MB |
| Requires iOS | 26.0 | **16.0** |
| Devices | **iPhone, iPad, Mac, Apple TV, Vision Pro** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Thomas Kollbach](https://appshunter.io/developer/316549989) | [Jan Cordes](https://appshunter.io/developer/6784176262) |

## What reviewers say

### Congress

[App page](https://appshunter.io/ios/app/congress-39c3/id941205524)

Navigate the 39th Chaos Communication Congress with this app. It offers a detailed schedule, session filtering, offline access, and live streaming capabilities. Stay organized with reminders and collaborate on session lists.

**Highlights:** Session schedule overview, Filter by language, room, track, skill, Offline data access, Live stream and video playback, Downloadable videos, Session reminders and alerts, Collaborative session lists

**In-app purchases:** none


### Trial Alert

[App page](https://appshunter.io/ios/app/trial-alert/id6786763690)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Access | $1.99 | one-time |


## Frequently asked questions

### Is Congress free?

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

### Is Trial Alert free?

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

### Do Congress or Trial Alert have ads?

Neither Congress nor Trial Alert shows ads.

### Which is updated more often, Congress or Trial Alert?

Congress ships an update every 9 days, and Trial Alert every 9 days. Most recently, Congress was updated on November 6, 2026 and Trial Alert on October 28, 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.*