AI Detective iPhone & iPad · iOS 17.0+ · Version 1.0.6

AI Detective: one new mystery a day, solved by asking the AI yes-or-no questions

Read today's baffling case, ask the AI anything, and it answers only yes, no or irrelevant. When you think you know the truth, declare it. Solve daily to keep your streak.

View on the App StoreFree to play · Pro is a subscription with a free trial
One case a dayA new mystery daily.
Yes / no / irrelevantThe AI answers only in these.
StreaksKeep solving daily.
01

What it is

AI Detective is an iPhone and iPad puzzle game by Rivership, an indie studio in Tokyo. It follows the "lateral thinking puzzle" format (known in Japan as ウミガメのスープ): you get a strange situation and have to work out what happened by asking questions.

Each case has a hidden truth. You ask free-form questions and the AI answers "yes", "no" or "irrelevant". You can declare the truth at any time. The app tracks your daily streak. The cases and in-app text are in Japanese and English.

02

Questions this app answers

03

Features

  • Daily case: one new mystery per day.
  • Ask the AI: free-form questions, answered with yes, no or irrelevant.
  • Declare the truth: solve the case and keep your streak.
  • Streaks: track your daily streak of solved cases.
  • Pro: unlimited questions per case, the full case archive and no ads.
Read today's case.

Free to play.

View on the App Store
04

What it does not do

05

Price

AI Detective is free to download. AI Detective Pro is a subscription with a free trial that removes the question limit per case, opens the archive of past cases and removes ads. Prices are shown in the app and on the App Store. Subscriptions renew automatically unless canceled at least 24 hours before the period ends.

06

Privacy and data

Your questions are sent to an AI service through Rivership's server so the AI can answer. Do not type personal information. The free version shows ads served by Google AdMob; Pro removes them.

07

FAQ

What is AI Detective?

A daily lateral-thinking mystery game where you question an AI that answers yes, no or irrelevant.

Do I need an account?

No.

Does it work offline?

No. Asking the AI needs an internet connection.

How much does AI Detective cost?

AI Detective is free to download. AI Detective Pro is a subscription with a free trial that removes the question limit per case, opens the archive of past cases and removes ads. Prices are shown in the app and on the App Store. Subscriptions renew automatically unless canceled at least 24 hours before the period ends.

Does AI Detective send my data anywhere?

Your questions are sent to an AI service through Rivership's server so the AI can answer. Do not type personal information. The free version shows ads served by Google AdMob; Pro removes them.

Which languages and devices are supported?

Japanese and English. iPhone and iPad with iOS 17.0 or later. An internet connection is needed to ask the AI.

One mystery a day. One truth to find.View on the App Store

iPhone & iPad · iOS 17.0+