Ridge Tracker Card vs KeySmart SmartCard Pro

The KeySmart SmartCard Pro is the stronger tracker for most wallets: a 350mAh battery rated for 24 months, a metal frame, and a faster Atlas Gen 3 chip. The Tracker Card wins on thinness and weight, at 1.6mm and 0.5 oz, so it disappears in a slim wallet and sits flush in a card slot. Both work with Apple Find My and Google Find Hub with no subscription, and both recharge wirelessly. Owners of the KeySmart line praise the long battery and sturdy build; the Tracker Card's 4.9 rating from 371 ratings reflects satisfaction, but its listed 5-month battery life is the clear weak point against the Pro.

• Choose the Tracker Card if you want the thinnest, lightest card that slides into a tight wallet slot and you don't mind recharging a few times a year.
• Choose the KeySmart SmartCard Pro if you want to charge it roughly twice a year and prefer an aluminum frame over a plastic shell.