Tractive, an Austrian company that makes smart location and activity trackers for dogs and cats, is expanding its presence in the US by acquiring a competitor, Whistle, from Mars Petcare. As a result of the acquisition, the Whistle platform is being shut down and its pet tracking devices will stop working on August 31st, 2025. Existing Whistle customers can get a free Tractive tracker as a replacement, while remaining subscriptions “will transfer to your new Tractive device,” according to the Tractive website.

The free replacement devices will only be available until September 30th, 2025 and will require Whistle users to register on Tractive’s platform through its website, select a new Tractive subscription, and provide the serial number of their current Whistle tracker.

Tractive is also honoring remaining Whistle plans but will be adding the remaining time to new Tractive subscriptions. According to an FAQ the company shared about the acquisition, if you have over two months remaining on an active Whistle plan, your remaining subscription time will be transferred to your new Tractive plan and you won’t be charged immediately. If there’s less than two months remaining, you’ll need to pay for a new Tractive plan at sign up but you’ll get two free months of service (no matter how much time you have left) added automatically.

The company’s Basic subscription plan starts at $108 if you subscribe for just one year, but a two year plan is discounted to $144. That includes GPS location tracking, heart and respiratory rate monitoring, bark tracking, virtual fences and escape alerts, and activity and sleep monitoring. The pricier Premium plan is $120 for one year, $168 for two years, or $300 for five years and adds features like family sharing so additional people can track a pet, worldwide cellular coverage, year long location history, and the option to export the GPS data.

Although remaining Whistle subscriptions are being honored, Whistle device warranties are not. When the trackers are shut down at the end of August they will no longer be supported. However, the free replacement devices that Tractive is offering will come with their own two year warranties.