One Lie: Korean Mystery
A detective game of deduction
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
Two truths, one lie.
Evidence doesn't lie. People do.
20 cases, 200 choices.
Three people give a statement. One of them is lying.
Read the case note, find the contradiction between the three statements, and name the liar.
■ 20 cases, 200 stages
Every case has an ending, and the endings connect into one.
■ Case Archive
Closed cases are kept in the archive. Open them any time to read the record and the explanation again.
■ Detective's Notebook
Culprit files, figures in the shadows. Collect every scattered cipher fragment and a single sentence comes together.
■ Ranks
The more cases you close, the higher your rank.
■ Investigative authority
Three wrong calls and the investigation stops for 15 minutes, then comes back on its own. Watch an ad if you would rather not wait.
This story is a work of fiction inspired by Korean traditional culture and history. Any resemblance to actual persons, organizations, religions, events, or locations is entirely coincidental.
Languages: English, Korean, Japanese, Chinese (Traditional), Spanish, Portuguese, French, German
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
• Stamps and markers are legible again in the dark theme.
• The Detective's Notebook follows the dark theme too.
• Close the app while reading a case intro or ending and you return to it.
• Closing a case now reports everything it unlocked.
• Smaller improvements and fixes throughout.
The developer, SOOYOUNG KIM, 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 Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
- Usage Data
Data Linked to You
The following data may be collected and linked to your identity:
- Usage Data
- Diagnostics
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- SOOYOUNG KIM
- Size
- 55.7 MB
- Category
- Puzzle
- 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 8 more
- English, French, German, Japanese, Korean, Portuguese, Simplified Chinese, Spanish, Traditional Chinese
- Age Rating
13+
- 13+
- Infrequent
Realistic Violence
Mature or Suggestive Themes
Horror/Fear Themes
Guns or Other Weapons
Contains
Advertising
- Copyright
- © 2026 SOOYOUNG KIM