Dedekto: Learn English
Detective Mystery Game
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
In Dedekto, you are the detective. In short, friendly mysteries you ask the characters questions in English, collect clues and find out who did it. When a question has a mistake, Dedekto gently corrects it and explains why in Turkish.
WELCOME TO THE CURIOSITY CLUB
You are the newest member of a small mystery club run by Fatma Teyze and Fındık the cat. A missing birthday cake, a football that vanishes before the big match, a snowy train journey... every mystery leads to the next.
HOW TO PLAY
• Explore the scene and find the glowing clues.
• Tap a character and type a question in English: "Where were you at three o'clock?"
• Use the clues in your notebook to guess who did it.
• Solve it, then read the confession, what really happened and the happy ending.
ENGLISH FOR TURKISH SPEAKERS
• Corrections built around the mistakes Turkish speakers make most: missing helper verbs, tenses and question order.
• A short, clear Turkish explanation with every correction.
• Twelve mysteries at A1, A2 and B1 level, from easy to harder.
• Read the stories in English, or check the Turkish with one tap.
• Listen to the characters' replies.
STUCK?
Fatma Teyze's hints and the "show a clue" suggestions help you along. A wrong guess is never a penalty: just keep looking.
FAMILY-FRIENDLY
No scares, no violence. Just warm, funny "who did it?" fun. No ads, no tracking.
OFFLINE, NO ACCOUNT NEEDED
Start playing right away, no sign-up. The mysteries are inside the app, so you can play on a plane, on the road, anywhere. If you like, sign in with Apple or email to keep your progress.
NEW: THE TOKYO FILES
The club goes to Japan! A lucky cat missing from a corner shop, a golden ladle at a ramen shop in Asakusa, a red hand print at a sumo stable in Ryogoku and a scroll on the bullet train to Kyoto. Ask tourists and exchange students questions in English and solve four Tokyo mysteries.
CASE PACKS
Three mysteries are free: the first two of Season 1 and Tokyo chapter 1. The other six Season 1 mysteries come in the one-time "Season 1 Case Pack", the other three Tokyo mysteries in the one-time "Tokyo Files" pack. No subscription: buy once, keep forever. You can restore your purchase at any time.
Privacy policy: https://dedekto.web.app/privacy
Support: dedekto.app@gmail.com
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
• Story-first onboarding: Jump straight into the first mystery ("The Missing Cake") right from the opening Curiosity Club invitation.
• Tokyo Files preview: Preview the opening story and illustrated scene of "The Lucky Cat" before purchasing the Tokyo pack.
• Optional case reminders: Enable gentle evening reminders for your unfinished mystery or next case.
• Japanese localization & UX improvements: Localized case-closed stamps, direct share links, refined post-solve navigation, and smoother cloud progress sync.
The developer, AHMET MUHAMMED AYDIN, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Purchases
- Contact Info
- User Content
- Identifiers
- Other Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- AHMET MUHAMMED AYDIN
- Size
- 67.4 MB
- Category
- Education
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 2 more
- English, Japanese, Turkish
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Tokyo Files $2.99
- Season 1 Case Pack $4.99
- Copyright
- © 2026 Ahmet Muhammed Aydın