Echo puzzle game released by German developer Lucas Hesseldieck

Lucas Hesseldieck, a German developer, has released Echo, a time-loop puzzle game for iPhone. The application distinguishes itself from typical freemium models by operating entirely offline without tracking, analytics, or external servers.

Echo features 100 puzzles in its campaign mode along with additional modes including daily puzzles, a Zen mode with endless procedurally generated levels, and a time challenge. While the game is free to download and all content is accessible without payment, the developer offers optional in-app purchases as voluntary donations.