I know that many folks would rather keep things simple using paper ledgers and don't want to bother with a computer. Heck, when I leave my IT job I keep telling myself I don't want to be around a computer, either, but know that will be difficult.
So, if I may add to the conversation, MS Excel is now in the business of a 'subscription' model, meaning you have to lease the license on a yearly basis as part of their Microsoft Office 365 portfolio of applications... corporate greed knows no bounds, it seems
Excel hasn't really added any "WOW" features that would be worth an annual subscription, anyway, but if you wanted to use an electronic spreadsheet while avoiding additional expenses, you could find an older version of Excel on probably an even older computer (who doesn't have an old computer that is hardly being used anymore -- and doesn't need to touch the internet). Another option is using the Google version called Google Sheets on the chrome browser. It is safe and secure (as any product on the internet) and would be my goto if I ever decided to launch my business, full time and it is still free.
Just my .035 worth (inflation)