Support
Earhythm is built and supported by one person, and mail is read.
Contact: admin@earhythm.com
Reporting a problem
The most useful report names the screen you were on, what you expected, and what happened instead. If the problem is about playback of a particular file, the file's format and where it came from helps.
Earhythm keeps a small diagnostic log on your device — it never leaves your phone unless you export it yourself. If you want to attach it: Settings → About & Help → Export, which opens your file picker so you choose where it goes. By default the log hides your file paths; that is yours to change in Settings → Privacy.
Privacy questions
The short version: the app cannot send anything anywhere — it does not request internet access. The long version is the privacy policy.