This is the support page of SleepRec every question the suggestion is welcome, I remember that SleepRec is a totally free app developed by a single person, who in his free time enjoys maintaining and improving this app, and also without any advertising banners, if you like the app you can offer me a coffee I will be happy to accept it.
You can download SleepRec in AppStore https://apps.apple.com/it/app/sleeprec/id1528754113