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Engage in daily AI-powered mystery games where you interrogate suspects, investigate locations, and analyze evidence to solve new cases. Compete for high scores and climb leaderboards by thinking like a real detective.
1.3
August 12, 2026
● You can now submit your final deduction by picking keywords. :After naming the culprit, you no longer have to write out the motive and the method. Just tap to pick 3 motive keywords and 2 method keywords from the ones prepared for each case. ● Not sure? Submit anyway. :Partial credit applies to both the motive and the method. You can even submit with the method keywords left empty.
MoreYou can play one case per day for free. Subscribing to Detective Pass unlocks three cases per day, expanded question points, and an ad-free experience.
Yes, Detective Diary contains advertisements. Subscribers to Detective Pass can enjoy an ad-free investigation experience.
Detective Diary is available on iPhone, iPad, and iPod devices.
Detective Diary has an age rating of 9+, making it suitable for younger players and adults alike.
The latest version, 1.2, was released on July 2, 2026, indicating regular updates to the game.
The description does not specify offline play capabilities. However, the AI interrogation feature suggests an online connection may be required for real-time suspect responses.
You receive a score and rank based on your accuracy in solving cases. Solving cases with fewer questions leads to higher scores, rewarding efficiency.
Yes, Detective Diary features a leaderboard where you can compete with other detectives based on your case-solving performance.