Beginner Question - Doing Charity app - Can it store users data so they can track progress

I have developed a system to help people with Mental Health by simple tick sheet for actions that help with producing key neurotransmitters such as Dopamine

Its a 28 day system that mostly like a spreadsheet with graphs, they tap check boxes and it keeps a log of what they have done each for their mental health

Very new to this coding (no coding) so apologies if question is a little basic