This app was mentioned in 12 comments, with an average of 1.17 upvotes
Collibo I like it for the seperation of categories, but it's also a little slow at updating new releases such as certain monster hunter ones
There is an Amiibo collecteor's app in the Google Play Store (Not sure about the App Store) Has all Amiibo released (even cards and Japanese Amiibo) up to Pearl and Marina.
I've been using an app on my phone and it's been kept up to date properly and it has an option to track all the amiibo cards separately rather than just marking the entire set as owned. :)
https://play.google.com/store/apps/details?id=air.com.applauz.amiibos
You sir are amazing.
Edit: I do wish that it supported Target, Toys R' Us, Gamestop, and Walmart. If it did I would have no issue with paying for it. $1.29/mo is totally worth though if the stock change gets you a cheaper amiibo.
Edit 2: https://play.google.com/store/apps/details?id=air.com.applauz.amiibos I have this app (complete version) currently because I was just looking for something to track what I have. I'll try amiibuddy because it looks to do what I want. I don't mind spending money in the play store with all the survey money I get through opinions :P THANKS A TON!
If you have an android phone or tablet, then this might work pretty well. https://play.google.com/store/apps/details?id=air.com.applauz.amiibos
https://play.google.com/store/apps/details?id=air.com.applauz.amiibos
This is an app that has all the amiibos and you can keep track on the ones you have.
Officially https://www.nintendo.com/amiibo/line-up/ but it's kind of obnoxious to scroll through.
You'll find we like sites and apps like https://amiibo.life/ and https://amiibochecklist.com/ and colliibo.
THere is another android app where all you need to do is tap the ones you have. https://play.google.com/store/apps/details?id=air.com.applauz.amiibos&hl=en
There is also a couple apps,
iOS - https://itunes.apple.com/us/app/collector-amiibo-edition/id984765441?mt=8
https://itunes.apple.com/us/app/collect-amiibos/id984333253?mt=8
https://itunes.apple.com/us/app/ucg-amiibo-edition/id969554875?mt=8
Android - https://play.google.com/store/apps/details?id=air.com.applauz.amiibos&hl=en