4Diary
Catering to your note needs with privacy and style
Created on 8th November 2025
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4Diary
Catering to your note needs with privacy and style
The problem 4Diary solves
In our modern day and age, the note-taking industry is growing faster than ever. Notes are like paper but better and faster. One's notes are the gateway to one's thoughts, beliefs and life but what if someone got access to these? Just what if someone knew your deepest darkest secrets?
Well with 4diary you don't have to worry anymore. With our E2E encryption model not even the server knows what you write. Password leaks? No problem, 4diary doesn't store your password in our databases.
Working on an obscure platform? 4diary is a web app so you only need a browser. (Bonus Kanban!)
Don't trust me? Well you dont have to! We are FLOSS and fully self-hostable.
Let's keep our thoughts to ourselves with 4diary.
Challenges I ran into
The biggest hurdle had to be developing, testing and doing everything from my phone alone. The second issue was probably finding resources to help me ship my app, Github Student Developer Pack helped me a lot along with Sentry, Vercel's free tier. Telling the AI exactly what to do was also a bit hard, also the fact that my annual exam was from 1st Dec.
Tracks Applied (2)
Best Use of GitHub
GitHub
Best Use of CodeRabbit
CodeRabbit.ai