GoKawiilMatthew Miller/ZDNET
Follow ZDNET: Add us as a preferred source on Google.
Deal: ZDNET readers can exclusively save 20% on any KeySmart SmartCard purchases from Aug. 1-31 at Amazon with the code ZDNET20OFF at checkout. This includes the latest SmartCard (Gen 3) and the SmartCard (Gen 3) Ghost model.
Also: I found 4 Bluetooth gadgets that are highly functional - and cheap
With this offer, you can grab a KeySmart SmartCard for $36 (save $9), a 3-pack for $77 (save $19), or a 5-pack for $120 (save $30). KeySmart's Bluetooth tracking cards pair with both Apple and Android devices, and provide location tracking for any essential that can store it: wallets, purses, pockets, etc. These slim cards are most popular for popping into wallets to add location-tracking services without needing to account for other popular devices like AirTags.
KeySmart's cards are ultra-thin, rechargeable, and longtime favorites of ZDNET staff like me, writer Matthew Miller, and gadgeteer Adrain Kingsley-Hughes. ZDNET's team has tested several iterations of the SmartCard over the years, including the latest SmartCard Gen 3 model.
Also: This AirTag-like card tracker is my top choice for Android and iOS users - and it's rechargeable
Expert Matthew Miller says the battery is projected to last users for 11 months, though it recharges easily.
"The SmartCard charges up wirelessly, so you can just set it down on your wireless charger to top it off. I like that I can use my Samsung Galaxy Z Fold 7 with reverse wireless charging to power up the card," Miller says in his review.
Also: The best Bluetooth trackers of 2026: Our top picks to keep tabs on your stuff
... continue reading