Hi, dear Dev, will the nexts update have some FMG themes ?
Looking for a fresh adult game? MODIFICATION APP delivers exactly that — a adult adventure available on Windows, macOS, Android.

MODIFICATION APP
is a 18+ transformation-focused erotic visual novel game in development!
Synopsis
Players are given access to a brand new MODIFICATION APP on your phone. A shady developer tells you that you can use it to modify your roommate any way you see fit - and even more she's into it? What will you be able to do? How far will you be able to go? Only way to know is to dive in and start MODIFYING!
About
The project has been in my mind for a long time, as a game I always wanted to exist. A game mostly focused on fun transformations and the fun events that come from those scenarios.
Credits
Game by: Tightly - https://x.com/tightly_dev
Mia VA: Mieraleeeem - https://x.com/mieraleeeem
Support the Project
If you too want to see this project continued, get early access, exclusive WIPs and vote on what will be implemented next, you can support it on Patreon or SubscribeStar!!
Because of itchio's bot problem, any comments with links will be automatically deleted.
Either way, don't click random links in the comments claiming to be "updates"
Explore more and see why MODIFICATION APP stands out.
| Published | Oct 08, 2026 |
| Status | In development |
| Author | tightly |
| Genre | 2d |
| Tags | Adult Ass Expansion Breast Expansion Giantess Hentai Mind Control Monster Girls Nsfw Transformation |
| Rating | 4.6 (1858) |
Comments
Hey! What size is the apk? Sometimes itch stops the apk download before it should, and it becomes un-installable.It should be 452mb. Please try to download the game again and install it. If that doesn't work, what does the error message say when installing?And what's your android device?
Hey! Yes, it should not. What are you playing on (pc/mac/android/iphone)? Also, does refreshing the page fix it?If it does not, just to double-check, could you open an incognito tab and let me know if that fixes it?This seems like there was some issue with the initial loading of the assets.
Hi Tightly! Big fan of your game. The game is sick and well designed. I got you some ideas for the game that others may like. First of all, the pet. I know that it's already in the game, but some people may like cats more than dogs (like me), so if you would consider making her a cat, it would be cool. Second, pregnant. I think it would interesting for her to just randomly get pregnant. Maybe on each stage she will get pregnant with more and more children, so please think of that. The last is fat and muscular. I'm pretty sure you are already thinking of adding the muscular modification, if not, then I gave you an idea. The fat one will of course be the opposite of muscular. Also, think of making continuations for modifications, or a mix, so we can mix modifications together. Maybe you can also add a second roommate.That's all I have to say. I enjoy your game and I hope it will be continued. Again, big fan.(I hope the comment is too big. If it is, please don't be mad)
Hey Tightly, I have played around with this app for a while, like since Breast Expansion or earlier, played both PC and Android. I really liked what it has going on, and I'm hoping to see what can be added in the future.I sometimes see info about at the end of a thread we can go to Mia's room to do stuff but it just says the door is locked.I am really curious about the buildings and beach areas, and I want to see them get a lot of activities, same for home, like bath or shower scenes or interactions.I want more cool stuff in the shop. TP was the currency right? The Vampire plushie was fun, so any more of those would be cool, maybe a Rabbit plushie for a Bunny Girl for spring time. Hopefully more minigames too.Also, kinda strange to say I'm sure, but could you also make a Normal Route for Mia? My idea is we are exploring all of these options but we haven't even tried to just go with the flow without modifications, so why not simply put a tracker in the paths section of the game telling us we can just ask her out like a normal couple, maybe a joke where Tightly is our wingman or something, or this Route is not shown at all, a secret route, and we have to figure it out, maybe the coffee shop receipt could give tips or guidance.Anyways, these are things I think of when playing your game. Please be safe, thank your for this game, and good luck going forward in this games development.Oh and please consider all of what I brought up in this comment, the normal route felt clever and funny, and it was nagging me when I last played.

