Not sure how big your collection is and what mobile operating system you're on but if you don't have a lot of animals to keep track of and if your phone runs on Android, check out Time2Feed. It's free and you can keep track of all the basics (sheds, feedings, size/weight, gender, age, notes, etc.) and it also allows you to create groups (snakes/lizards/etc.) and has a neat 'quick feeding' feature if you wanna add a feeding record to multiple animals.
It's way cheaper than Reptile Scan and offers similar functionality - though I'll admit I've never used RS.
Here's a link from the Google Play store:
https://play.google.com/store/apps/d...feed.app&hl=en