Sleep Better with Runtastic is a well-polished sleep tracking app for Android and iOS that I’ve been using for the past year or so without issue. Unfortunately I found out a few days ago that Runtastic does not sync your sleep session data with their servers, which means that you lose everything if you uninstall the app or get a new phone. Having no export function also means that you are limited to the app’s visualisation and statistics features.
I started digging for a solution and soon found that the app stores its database at the following location (access to this directory requires root):
This turns out to be a sqlite database that you can view with any compatble program (I used DB Browser for SQLite) and from there you can easily export the data in each table as a CSV file.
As an example of what you can do with the data, I made a scatterplot of the number of hours I slept against my sleep efficiency:
If only companies would make it easier to access your own data.