Many a harried person (this writer included) has left a wallet in a taxi, bus, or even restaurant, so imagine if you got an alert each time you've been careless.
For that purpose, Singapore-based company Innova Technology has developed "anti-Loss" (aL), which is basically a Bluetooth smart card. Due to its thin and small form factor (similar to two credit cards stacked together), you can place aL in your wallet, bag, passport cover, or anywhere you fancy.
aL pairs with your smartphone via Bluetooth and is activated via an app. Using this app, you can set an alarm to go off each time aL is separated from your phone (the distance is set by the user).
Via the app, you can also triangulate the last known location of aL (and thus your wallet) via GPS. However, it is currently unable to track movements (e.g., if your wallet is stolen). … Read more