<p>Save $109 on a 3-pack of the KeySmart SmartCards.</p> <p>The post <a href="https://www.popsci.com/sponsored-content/keysmart-smartcard-wallet-tracker-airtag-alternative-sponsored-deal/">They made a wallet tracker like the AirTag, but thinner than a Ritz cracker</a> appeared first on <a href="https://www.popsci.com">Popular Science</a>.</p>