Anyone built an app for tracking workouts?

Hi everyone! I'm thinking about writing a simple B4A app to log my runs and see progress over time. There are tons of these apps in stores, but I want something personal — no ads, no bloat. Has anyone tried building something similar? I'm curious about the best way to store data — SQLite or just text files? And how to make simple charts — maybe there are existing examples? Don't want to reinvent the wheel if someone's already tackled this stuff.

SQLite is the best option. For graphs you can use google charts in a webview.

A few questions you could ask yourself:
- when do i log the information and how frequently?
- what kind of information do i log?
- what do i do with the logged information afterwards?
- how do i log the information: in a database, in a spreadsheet or in a (formatted) text file?
- do i only need an app for an Android smartphone or for a tablet too?

Give more information and you probably will get more answers.