Walli is a smart wallet that connects to your phone and sends you a notification wherever and whenever you leave it behind. It will also notify you if you leave a card behind. Once you connect Walli to your phone, the Walli App continuously monitors your wallet activity.
Iti connects to your smartphone over bluetooth and works with Android & IOS. It sends signal to your phone when your credit card/ID is missing for too long. You can set a timer (through the app), after which the app will notify you about the missing card pocket.