Last updated on December 1st, 2025 at 06:30 pm
Miss Detective's Undercover – Simulation Game Review
Miss Detective's Undercover is a Simulation game from Day7, first launched in 7th July 2017.
It’s rated 12+ and currently has 49+ ratings on the App Store.
What Makes Miss Detective's Undercover Stand Out
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!
This Simulation game offers engaging gameplay and regular updates for mobile players.
Player Feedback
As a newer release, Miss Detective's Undercover is building its player community. Early feedback suggests .
Recent Updates & Development
Latest Update: 21st February 2022
Recent improvements include:
Bug fix.
Download & Availability
Miss Detective's Undercover is available through the official App Store for iOS devices.
Get Miss Detective's Undercover on App Store
Requirements: Requires iPhone 5s / iPad Air / iPad Air (Cellular) / iPad Mini 2 (Retina) / iPad Mini 2 (Retina, Cellular) / iPhone 6 / iPhone 6 Plus / iPad Air 2 / iPad Air 2 (Cellular) / iPad Mini 3 or later.
Compatible with iPhone and iPad devices.
Player Experience Highlights
Community Insight:
We recently redownloaded this game after several years of not playing it/having issues getting it to work on our new phone due to a glitch, and none of our 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). We cant find any restore purchases option either, so for the time being, we cant recommend playing this game or making any purchases in it to anyone until the issues resolved. (Otherwise, the art and storylines are cute. The translations were a bit wonky at times though, based on what we remember from last playing it several years ago.).
At first, we wasnt really interested, but as we got deeper and deeper into each character, we loved it!!! We personally think that the Mystic Thief X is the best, it had such a good ending! Though, if you want more coins, we went to the free charging station, you download and play some of these games to get more coins. We actually kept some of the games we played cuz there nice. Another thing we liked was, how each character was different. For example: Walter was an cold person, but as you got to know him, you got to see his sweet, shy otaku side! With Sean though, he was playful but sorta creepy at first, he tries to act confident, but he really just a giant teddy bear that needs some loving!!!!Anyways, we loved it!!! We hope for anyone who plays this, also does.
Alright, this game was very interesting. Definitely enjoyed it. Mystic Thief and the Protag were very cute, however – we cant help but notice… What if this game didnt have a true ending? Just a happy ending with anyone? Even if it is just a game, it makes us feel guilty for everyone else… We dunno, it was enjoyable, but we really liked Walter, haha.
We think the thief is Jermey b/c if Im not mistaken didnt the mystic their x have purple eyes just like jermeys but different hair.
We love the whole look and feel of the game. The characters are well drawn and the plot is nice. So far we haven't been forced to pay to see the story like many other games.
This game is so good , we love the plotline and all ! <33 we used to play this on our old android phone,, and we found it here now. But it kinda crashes here, so we hope the developer will fix it for better experience.
It always blacks out then crashes.
The games pretty good, the character are great so is the storyline. Ill get straight to the point the app crashes, like a lot. Ive tried shutting down our phone, delete and download, and now our final optional is to just write a review and pray that the dev will read it. Please fix this issue.
We keep opening the app and then it closes it out again without us doing anything and we havent even gotten to play the game yet because of it.
The art work and story line is beautiful and we enjoy it very much. We will say though it is hard to get coins. When you watch videos, you may only obtain 300 each time with a limit of 5. The surveys offers more. But every time we take a survey.. We NEVER GET MY REWARD. Im disappointed honestly. Save your time if you dont want to spend $ and play another game.
We were looking forward to playing this but whenever we go into the app it keeps kicking us out.
Reading previous reviews we though we could enjoy a game without blowing away cash. Our expectations were soon broken when we couldnt get the happy ending. At first we assumed all of our choices were not the best, but when we picked all the right ones we still got the bad ending. Why? Cause you need to pay $10 to see the happy ending or any ending with the guy.
Ok. So. Im sure its a good game but not even 0.001 seconds into the game it crashes. We realize that the app hasnt been updated in 4 years and probably wont be for a while but please fix this ASAP.
We cant put more stars when we cant even play the game it completely exits out of the game not even letting us play at all.
The app keeps crashing a lot. Like, A LOT. We couldnt even start playing because it didnt let us get past the first few loading panels.
We were really excited to start playing the game but it wont even let us in it just crashes Ive tried deleting and downloading again but doesnt work Ive even tried restarting our phone that doesnt even work we dont need any new updates so why the heck cant we get in.
Every time we try to play it crashes.
It wont work for us every time we open it just shows the title screen and then takes us out of the game we've already tried deleting and redownload it but nothing works.
Its just kicking us out plz fix this.
The game needs an update, it crashes before we can even look at the title screen.
- We open the game 2. We tap the screen giving the info about the game being saved to our iCloud account 3. Get to the title screen 4. Game crashes we tried opening it multiple times but it keeps repeating the crashing. The first time we opened the app, it played the music for a second before crashing but we havent heard the music on any following attempts of opening the game. Im on a 10.5 in iPad, please help, this game looks really interesting.
We havent been able to play Day7 games because they dont even load and keep crashing. There also needs to be a feature to restore purchases because when we tried deleting then re-installing the apps all the coins & items we purchased were gone and we lost all our progress from the routes we had already completed.
Loved this game! The protagonist and Mysterious Thief X were so cute together, and the CGs were beautiful.
User feedback from Apple App Store
App Details
- Version: 1.0.9
- Size: 244.50 MB
- iOS: 11.0 or later
- Languages: EN
- Content Advisory: Infrequent/Mild Sexual Content and Nudity, Infrequent/Mild Mature/Suggestive Themes
- Developer: [Day7]()
Last updated: 21st February 2022 | Genre: Simulation | Developer: Day7