DeGoogle Yourself

Hello everyone.

Currently me and my GF have our finances organized in a Google sheet file (hosted on Google drive), being that file integrated with a Google form.

What we do is having on our cellphones a shortcut to the form, where we input all our expenses, they are directly and automatically registered in the sheet, and on another tab we've built some sort of dashboard based on all the values the form registers.

So given this context, is there any option or group of options that are open source, and that achieve this same purpose / scenario?

If possible everything acessible on a cloud or at least onlinez so we don't lose this flexibility and accessibility on our cellphones.

Thanks in advance