It really only tracks your position reliably when wifi and GPS is on. This actually causes some battery drain, even if the app itself does not use much battery.
The most important point: no possibility to add missed locations and times. The day has 24h but the app doesnt show times when location wasnt tracked and there is no way for the user to add them manually.
Please, add this possibility.
jagehweida about Life Cycle - Track Your Time, v1.2