Dropped $380 on a used load chart app subscription and I feel like a sucker

So about 7 months ago I got talked into a yearly subscription for one of those load chart apps on my phone. The guy showing it to me made it sound like I could not run a lift without it. $380 later and I barely open the thing. Half the time my book in the cab is faster because I know exactly where to flip, and the app keeps bugging me to update when I am up on a pour. I finally sat down and tracked it for 2 weeks and I opened it maybe 4 times, and 3 of those were just to prove to myself I still had it. My old paper chart has grease on it and coffee rings and it has never once needed wifi. I am not saying the app is trash for everybody, but for me it was $380 for a screen I forget exists. Anyone else pay for a tool or sub they barely touch, or is it just me being dumb with money again?