Congress vs Peeper
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/
Peeper
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Peeper is a field-oriented listening tool for frog and toad calls. In quiet outdoor conditions, tap Listen and Peeper analyzes short microphone samples with a regional model, then presents likely species as candidate matches with model scores. Review recent candidates, open species background information, and email or share a session summary from your device. Location access is optional and is used while the app is open to select an appropriate North American region; you can continue with the current region when location is unavailable. Automated identifications can be wrong, particularly around speech, vehicles, wind, music, and other competing sounds. Confirm important observations independently. Peeper is not intended as the sole basis for research, regulatory, legal, medical, or safety decisions. Network access is required for live analysis.
Screenshots
Verdict
The clearest difference is price: Congress at Free against Peeper's $4.99. Congress also leads on device support (5 vs 3). Peeper's advantage is iOS requirement (15.1 vs 26.0). On update cadence, ads and in-app purchases 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
Congress is free to download; Peeper costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Both ship on a similar rhythm, roughly every 9 days. The most recent releases landed on October 10, 2026 and October 5, 2026 respectively.
| Parameter | Congress | Peeper |
|---|---|---|
| Price | Free — better | $4.99 |
| Rating | 4.8 (26 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 26 — better | — |
| Update frequency | Every 9 days | Every 9 days |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, Mac, Apple TV, Vision Pro — better | iPhone, iPad, iPod |
| Requires iOS | 26.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 38 MB | 133 MB |
| Age rating | 4+ | 4+ |
| Developer | Thomas Kollbach | Richard Podolsky |
In-app purchases
Congress
No in-app purchases
Peeper
No in-app purchases







