Tracking your video game collection

Any feedback from those who keep track of all their video games, so you don't buy dupes, what you know you've played, what you want to buy, etc?

I was literally just keeping a text list in a task management program I use for ......task management.....since I could easily get to it on my phone.

Obviously a spreadsheet on Google Drive or Dropbox would be fairly easy, just haven't done it.

Thus, I started playing around in the Play store and found some video game tracking/collection apps:
https://play.google.com/store/apps/d...llection&hl=en
https://play.google.com/store/apps/d...ergratis&hl=en
https://play.google.com/store/apps/d...gamefree&hl=en

Anyone got feedback on any of those? Just as easy to make my own spreadsheet?

Part of it is I'd like to have it accessible on my phone easily, not have to pull up some website, log in, etc.

Thanks in advance for any comments!