"Sounds"? You are an expert in measuring value by vague comments?
Okay:
- The expense splitting app I made for myself, my friends, and maybe other people (no ide if it will be picked up), after I was managing a giant spreadsheet of our new year's trip costs. Now my app calculates everything, of any complexity, and it is used.
- The stock trading site has everything that I need from a stock trading site (to look for opportunities to buy), but I needed 3 or 4 before
- The weather app I made not because there's not enough weather apps, but because each and every app wants your data for 1000s of their partners, so I made my own thing that shows weather.
If it's not real life value, then I don't know