What are some app ideas that you think would benefit people on a perosnal level?

A financial chat for personal expenses. The user enters one number, how much money he has spent so far. The chat responds with a message:

1. List of expenses for today

2. Total expenses for today

3. Total expenses since the beginning of the month

4. Average expenses per day, calculated as total_since_the_beginning_of_the_month / current_date_of_the_month

5. Forecast of expenses for the month, calculated as average_expense_per_day * number_of_days_in_the_month

It is useful to add in advance on certain dates, scheduled loan payments and rent payments, which can be ignored in the average daily expense, so that it reflects only current expenses that can be reduced. It would be convenient to scan the QR code on receipts so as not to enter them manually.

This app will help people save money.

I've mentioned this here and elsewhere, but it's an app where you specify a word or phrase, and get a notification when someone else is nearby and has the same word or phrase set. Seems like a nice starter app. Good luck on your journey!

Something like PiHole for localhost only to run on phones when away from trusted WiFi.