3x the rent as a revenue and 3 month deposit is also standard in Switzerland. However, the deposit is put in a special account and the bank releases it when you move out. It is not that easy for the landlord to get a part of it. About the rent not exceeding one third of the revenue, it’s of course not always easy to do, but if you exceeded it, you would risk having other financial problems which wouldn’t be good for you neither.

This sounds great. I would definitely love a splitwise alternative in particular!

You may want to think about using another name for your app suite though. Since it may bring confusion with the simple mobile tools (https://simplemobiletools.com/index.html) which for example also have a “Simple Notes” app.

Are you maybe using Windows? I’ve heard it can be slow sometimes, even on modern hardware.

I’d recommend a longer full time week. If the full time week is too short, many people well rely on overtime for their salary. This completely destroys the benefits of some of your other points, since you can’t do overtime during vacations, parental leave, sick leave, etc. Overtime should not be the norm if you want a good social/financial security.

Edit: part time job should of course always be possible if your revenue allows you to work shorter weeks