nacn.appAbout this site
- Site name
- nacn.app
- URL
- https://nacn.app/en/
- Operator
- nacn
- Launched
- October 2026
- Price
- Free (no account or install needed)
Games
| Game | URL |
|---|---|
| Diet Diary | https://diet-diary.nacn.app/en/ |
| Muscle Diary | https://muscle-diary.nacn.app/en/ |
| Boba Shop Diary | https://boba-diary.nacn.app/en/ |
| Nostalgia Diary | https://nostalgia-diary.nacn.app/ |
| Isekai Diary | https://isekai-diary.nacn.app/?lang=en |
Each game is published on a subdomain of nacn.app, and all of them are run by the same operator.
Why I made this site
Most phone games make you install an app or create an account before you can play. Sometimes that hassle is enough to make you give up when you only wanted to try something. nacn.app is a place for casual games that start the moment you open the URL and let you continue where you left off after closing the page.
The games cover all kinds of themes, from everyday things like dieting and strength training to stories like being reborn in another world. Every game moves forward a little at a time, a day or a week at a time like a diary, and the choices you make lead to the results. I'll keep adding games that make you want to play "just one more time."
About the game content
The weight and calorie calculations in Diet Diary are based on formulas used in public health resources and research, but they are simplified estimates for a game. This site is not medical advice and is not intended to diagnose, treat, or give individual health guidance. Talk to a doctor, registered dietitian, or other health professional about real weight loss and health decisions.
The muscle and one-rep max calculations in Muscle Diary are also simplified estimates based on research and widely used guidelines, and are not intended as individual training guidance. Talk to a doctor, certified trainer, or other professional about real training and nutrition.
The startup costs, rent, wages, and payback times in Boba Shop Diary are simplified estimates for a game. They don't include your own salary or utilities. Talk to a professional about opening a real shop or planning its finances.
The trend timeline in Nostalgia Diary is compiled from public records, but its accuracy is not guaranteed. Product and title names are trademarks or works of their respective owners. They are named only to describe what was popular in a given year, and this site is not affiliated with any of them.
Contact
Please send feedback, comments, or bug reports about nacn.app and its games through the contact form below. It helps if you mention which game your message is about.
The form's questions are in Japanese, but messages in English are welcome. I'll review messages and reply as time allows. I may not be able to reply to every message. Any personal information you include will be used only to reply to you.
Related pages
- Games
- Privacy Policy (ads, analytics, and disclaimer)