Miss Detective's Undercover

Name: Miss Detective's Undercover
Rating: 3 (3 reviews)
Author: Day7

By: Day7

Simulation

Features & Capabilities

City's infamous gentleman of the night, Mystic Thief X! And the detective who was stolen her first kiss! Among the 3 suspects, who is the Mystic Thief who stole her first kiss?

I like you lots and lots!! Sickly romanticist boy, 「Jeremy」

Are you the one, my Contractor. of. Darkness.? A Twelvie eye patched guy, 「Sean」

Not an Otaku, A perfect(?) Student President 「Walter」

And My dear detective, 「Mystic Thief X」, who sends forenotice only to me!!

Miss Detective, can you catch the Mystic Thief X, unlike the words by nagging assistant 「Martin」?

The culprit, Mystic Thief X, is among us!! Miss Detective's Undercover!

User Growth & Download Statistics

App

By:

Day7

Rating:

3.00

(3)

Version:

26.1.2 Last updated: 2026-01-22

Version code:

881657458

Creation date:

2017-07-07

Compatible devices:

Size:

256.42MB

URLs:

Website ,Privacy policy

Full description:

Source:

Apple Apps Store

Data ingested on:

2026-06-11

Compare stats and ranking:

Ranking

# 773,973 ▼ 8,860

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

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Developed by:

Day7

Apple Apps Store

https://apps.apple.com/my/app/miss-detectives-undercover/id1247401427

Website:

http://day7games.com

User Reviews

Users praise the game’s art, visuals, and engaging plot and characters, highlighting strong artwork and appealing romance. However, the majority report severe stability issues: frequent crashes on startup or during loading, making the game unplayable. Recurrent data/persistence problems are also mentioned—iCloud saves not working and purchases/progress not restoring after reinstall due to a missing restore purchases option. Overall, the app shows high potential but requires urgent fixes to stability and reliable data restoration to satisfy players.

Pros

Beautiful art style and character designs
Captivating plotline and romance
Well-developed characters and relationships
High-quality visuals and overall aesthetic (CGs)

Cons

Frequent crashes and exits, often preventing gameplay
Data persistence issues: iCloud save not working and progress/purchases not restored
Missing or non-functional restore purchases option

Recent reviews

I recently redownloaded this game after several years of not playing it/having issues getting it to work on my new phone due to a glitch, and none of my past purchases or game data have been saved (even though the beginning message states that game data and items will be automatically saved into your iCloud connected to this account). I can’t find any restore purchases option either, so for the time being, I can’t recommend playing this game or making any purchases in it to anyone until the issue’s resolved. (Otherwise, the art and storylines are cute. The translations were a bit wonky at times though, based on what I remember from last playing it several years ago.)