Comparison

Congress vs Peeper

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

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
Read full description

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/

About

Peeper

Features
Read full description

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

Congress4 screens
Peeper1 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Congress is free to download; Peeper costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 9 days. The most recent releases landed on October 10, 2026 and October 5, 2026 respectively.

Scorecard3 real differences · 7 level
Congress versus Peeper: the parameters behind the verdict, then further details
ParameterCongressPeeper
PriceFree — better$4.99
Rating4.8 (26 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings26 — better—
Update frequencyEvery 9 daysEvery 9 days
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, Mac, Apple TV, Vision Pro — betteriPhone, iPad, iPod
Requires iOS26.015.1 — better
Further details — not scored
Size38 MB133 MB
Age rating4+4+
DeveloperThomas KollbachRichard Podolsky

In-app purchases

None

Congress

No in-app purchases

None

Peeper

No in-app purchases

Questions

Is Congress free?
Congress is free to download, with no in-app purchases.
Is Peeper free?
Peeper costs $4.99, with no in-app purchases.
Do Congress or Peeper have ads?
Neither Congress nor Peeper shows ads.
Which is updated more often, Congress or Peeper?
Congress ships an update every 9 days, and Peeper every 9 days. Most recently, Congress was updated on October 10, 2026 and Peeper on October 5, 2026.

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