Very interesting article about Hiitmi. Thanks for the extensive test! https://www.fitforfun.de/tests/produkttest/hiitmi-im-test-die-ideale-app-fuer-dein-intervalltraining-412328.html
Hiitmi on funzen.net
https://www.funzen.net/ge/2019/11/03/hiitmi-ist-eine-neue-kostenlose-fitness-app-die-sie-nicht-verpassen-durfen/