Invoxia
Lost-pet prevention and monitoring — chosen by GPS, activity tracking, and subscription.
A GPS tracker works out its own position and sends it over a cellular network: you see the cat on a map, but it needs a subscription and a charge every few days. A Bluetooth tag such as an AirTag or Tile only emits a signal, and it surfaces when someone else's phone happens to pass nearby. The “GPS” column separates the two groups.
Tractive works in 175+ countries over 2G/LTE-M — on AT&T, Verizon and T-Mobile in the US — but now requires at least a year paid up front, and the basic plan covers one country only. Weenect covers 100+ countries including all of Europe and bills monthly. Add the device price to two years of subscription; the ranking often differs from the purchase price alone.
An AirTag reports through nearby iPhones. Coverage tracks iPhone share — roughly half of handsets in the UK and the Nordics, about 30–35 % across the EU on average — so cities update quickly while rural areas can go hours between fixes. Tile runs on both iPhone and Android but has a far smaller network. For a cat that roams beyond a built-up area, a tag is not a substitute for GPS.
Collars come off; an implanted chip does not. In England, microchipping has been compulsory since 10 June 2024 — cats must be chipped before 20 weeks and the keeper's details kept current on a database, with a fine of up to £500 for non-compliance. There is no federal requirement in the US, so check your state and city rules, and keep the registry entry up to date wherever you are.