Your habit tracker shouldn't hold your data hostage
Most habit apps rent you access to your own streaks. Here's the case for an offline tracker that's just a file you own.
Every subscription habit app has the same quiet leverage: your streaks live on their server, so quitting means losing your history. That’s not a feature, it’s a lock-in.
An offline tracker flips it. The app is a file on your machine. Your habits, streaks and heatmap live in your browser’s local database — nothing is uploaded, there is no server, and there is nothing to cancel. Export everything to JSON any time; import it on another device.
Pay once, own the file, keep it forever. That’s the whole idea behind Habitline.