I’ve been using the CarFAX Car Care app/website for a long time but I’m looking for something better.
It would be nice to have something I can enter my car make/model into and have it suggest maintenance but also keep track of repairs. I like uploading PDF scans of receipts too; one thing that always bothered me about Car Care is the horrible, weird compression it does on those files.
At the risk of sounding like an oaf I just use an excel document, and these days I just keep it in nextcloud and edit it via a browser while in the driveway. Each car gets a sheet. Keeping it simple.