I usually only use a spreadsheet. I maintain one to keep track of interesting companies for the future (e.g. when I receive a cold email that seems interesting

I usually only use a spreadsheet. I maintain one to keep track of interesting companies for the future (e.g. when I receive a cold email that seems interesting but am not ready for a move yet), I also use it to list companies I don't want to do business with - either they were difficult to deal with in the past or their recruiters were not behaving professionally. When actively looking I list companies, contacts there, pros/cons, recruiting process. I would definitely not pay for an app I would use every other year at the most.