Detective Diary: Whodunit
탐정일지 : 미스터리 추리게임
Detective Diary: Whodunit is #23 in Games › Trivia Grossing in South Korea and charting in 1 of 30 countries we track.
Updated 25 Oct 2026 · rankings refresh through the day
DeveloperJunsu Hwang
CategoryGames
PriceFree
Released
Rating★ 4.7 (9)
Version1.4.0
Age rating9+
First seen by us
24 Sep 2026
24 Sep 2026Installs (est.)500+ worldwide
Rating
4.7 ★
9 ratings
Measured
Best rank now
#23
Games › Trivia GrossingMeasured
Detective Diary: Whodunit at a glance
AI summary written from our chart and store data. It can be wrong: check the numbers above.
Mystery Puzzle Realistic Modern short sessions Subscription IAP
#detective #ai #investigation #daily case #single player #deduction
Detective Diary: Whodunit on the App Store
App details
App ID
6760389759
Publisher
Junsu Hwang
On the store since
May 2026
Under a year
Minimum OS
iOS 15.1+
iPhone 6s and later
Devices
iPhone · iPad
Universal purchase
Content rating
9+
Languages
3
EN JA KO
Size
244 MB
Also listed in
Trivia, Strategy, Entertainment
Detective Diary: Whodunit downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Apple publishes no download counts. iPhone downloads come from chart positions and daily rating growth per country, calibrated on Google Play install counts; lifetime installs from ratings worldwide × installs per rating. Confidence is the chance the real number is within half to double ours.
Where Detective Diary: Whodunit's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
Business model: Ad-led
How Detective Diary: Whodunit makes money: subscriptions, one-off purchases and ads.
Ads · 1 ad networks
Ads
/mo
of revenue
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| South Korea | Games › TriviaGrossing | #23 |
| South Korea | Games › TriviaFree | #30 |
Apps near Detective Diary: Whodunit on the chart
Games › Trivia Grossing, around #23.
Ratings
App Store, worldwide.
Rating
4.7 ★
9 ratings
Measured
Ratings
9
Measured
About Detective Diary: Whodunit
Interrogate AI suspects and uncover the truth behind each case.
A new mystery every day.
Detective Diary - A solo murder mystery detective game
You are today’s detective.
A new case is assigned to you every day.
Interrogate suspects, investigate locations, and analyze evidence.
Can you uncover the culprit and their motive?
How to Play
1. Review the Case - Check the case details, suspects, and locations
2. Investigate - Question AI suspects and search locations for clues
3. Deduce - Identify the culprit, motive, and method
4. Result - Get your score and rank based on your accuracy
Features
AI Interrogation - Talk to suspects in real time. Their responses change based on your evidence
Daily Cases - A brand-new mystery every day
Efficiency Score - Solve cases with fewer questions for higher scores
Share Your Case - Share your investigation results with friends
Leaderboard - Compete with other detectives
Detective Pass
Play one case per day for free.
Subscribe to Detective Pass to unlock:
3 cases per day
Expanded question points
Ad-free investigation
Think like a real detective.
The truth is in your hands.
Terms of Use(EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
A new mystery every day.
Detective Diary - A solo murder mystery detective game
You are today’s detective.
A new case is assigned to you every day.
Interrogate suspects, investigate locations, and analyze evidence.
Can you uncover the culprit and their motive?
How to Play
1. Review the Case - Check the case details, suspects, and locations
2. Investigate - Question AI suspects and search locations for clues
3. Deduce - Identify the culprit, motive, and method
4. Result - Get your score and rank based on your accuracy
Features
AI Interrogation - Talk to suspects in real time. Their responses change based on your evidence
Daily Cases - A brand-new mystery every day
Efficiency Score - Solve cases with fewer questions for higher scores
Share Your Case - Share your investigation results with friends
Leaderboard - Compete with other detectives
Detective Pass
Play one case per day for free.
Subscribe to Detective Pass to unlock:
3 cases per day
Expanded question points
Ad-free investigation
Think like a real detective.
The truth is in your hands.
Terms of Use(EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Latest updates
1.4.0
● Invite Friends event is live.
: When a friend submits a first case, you both get a reward case.
● Detective Pass: 3 free past cases a day.
: Subscribers start past cases free.
● Revisit solved cases in your Archive.
: See your answer and verdict record.
● Results read like a case report.
: Compare your answer with The Truth.
● New: Send Feedback.
: Share thoughts with a screenshot.
● Bug fixes.
: Smoother investigations.
1.3.5
● Bug fixes and improvements.
: We raised the request limit, now show how long until you can try again, and fixed the app closing when this notice appeared.
1.3.4
● 랭킹이 새로워졌어요.
: 꾸준한 실력을 보여주는 '추리력' 랭킹이 추가됐고, 상위 3명은 시상대에서 만나볼 수 있어요. 내 순위는 목록 아래에 항상 표시돼요.
● 일일 랭킹 1~3위에게 보상을 드려요.
: 전날 일일 랭킹 3위 안에 들면 다음 날 앱을 켤 때 누적 점수 보너스를 알려드려요.
● 매일 출석하고 크레딧을 받아보세요.
: '이번 주 출석부'에서 출석하고 사건을 제출하면 크레딧이 쌓이고, 주간 보너스도 받을 수 있어요. 모은 크레딧으로 추가 질문, 지난 사건, 독점 사건을 구매할 수 있어요.
● 이용 중 발견된 문제를 개선했어요.
: 더 안정적인 수사를 위해 몇 가지 오류를 바로잡았어요.
Store changes
What Detective Diary: Whodunit changed on its store page: name, icon, screenshots, price, size, languages, requirements.
Added 2 languages
+ JA + KO
Description updated
Renamed
탐정일지 Detective Diary → 탐정일지 : 미스터리 추리게임