Whilst we had Zig3 v1 a way to purchase and trade Zi, the feed back from the Stellar community was the login seemed like a scam: https://galactictalk.org/d/2090-launch-of-zig3-io-free-10k-zi-airdrop . So we took that on board, we work hard on our secure logins, entered our project in to Stellar Community fund round 11 and WON!. https://medium.com/stellar-community/scf-11-announcing-the-winners-8bcd5606fc09

Zig3 v2 allows users to login connecting their wallets with several methods include our ground breaking biometric, key local store, encryption, and retrieval solution. In Zig3 v2 you are able to connect to Stellar Anchors with Sep24 flows to connect to banks for faster payments. https://zig3.org

 

Zig3-v2
Connect your Wallet with biometrics