Congress vs Trial Alert
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Congress
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.
- 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
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Your guide to the 39th Chaos Communication Congress from 27th to 30th December in the Congress Center Hamburg. Features: - In Englisch and German - For iPad and iPhone - Calendar or list style overview of all sessions - Filter sessions by language, room, track or skill level - Offline data: Find what you are looking for even if the WiFi is down - Watch live streams and video recordings right from inside the app - Download videos for offline watching - Favorites - Collaborate on lists of sessions - Reminders: Never miss a session - iCloud sync for favorites, list and reminders - Search for sessions and speakers - Get alerts when your favourite sessions get rescheduled or cancelled - Keyboard support for iPad - Support for Shortcuts - Also check out the tvOS and macOS App More info about the event at https://events.ccc.de/
Trial Alert
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Trial Alert keeps watch on the world's research for you. Pick any topic, a disease, a drug, a keyword, a research area and Trial Alert continuously monitors the major public sources and notifies you the moment something new appears. No more manual searching, no more missed papers. WHAT IT WATCHES • PubMed biomedical literature • ClinicalTrials.gov registered clinical trials • Europe PMC life-science papers & preprints • News mainstream coverage WHY YOU'LL LOVE IT • One combined feed, newest first, with a NEW badge on anything you haven't seen • Filter the feed by source or by an individual search • Follow the authors of papers you like to catch their future work • Pull to refresh for an instant check anytime • On-device local notifications no account, no sign-in, no tracking, no ads FREE & PREMIUM Free forever with one saved search checked weekly. Upgrade to Premium once a one-time purchase, no subscription for unlimited searches and faster daily or twice-a-day checks. Trial Alert aggregates publicly available research metadata for convenience and awareness. It is not a medical device and does not provide medical advice always verify with primary sources and qualified professionals.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Congress | Trial Alert |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (30 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 30 — better | — |
| Update frequency | Every 9 days | Every 9 days |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, Mac, Apple TV, Vision Pro — better | iPhone, iPad |
| Requires iOS | 26.0 | 16.0 — better |
| Further details — not scored | ||
| Size | 38 MB | 1 MB |
| Age rating | 4+ | 17+ |
| Developer | Thomas Kollbach | Jan Cordes |
In-app purchases
Congress
No in-app purchases
Trial Alert
- Premium Access$1.99
