ZOANMasterJS is a CryptoZoons browser extension that enhances the https://app.cryptozoon.io/ UX experience with helpful statistics. It includes a BNB fee tracker and a battle tracker.
ZOANMasterJS is open source, but access to the API requires a .01 BNB tip to the development team every 40 days.
You can still download and install this asset and enjoy a 14 day free trial without having to tip any BNB. The trial is tied to your MetaMask wallet address.