Bluetooth tags are not cellular GPS trackers
A crowdsourced Bluetooth tag can be excellent for finding objects and can sometimes help locate a pet when another compatible phone passes nearby. It does not continuously transmit its own location over a cellular network.
That distinction matters most when a dog leaves populated areas. A tracker that depends on other phones has a different failure mode from Fi or Tractive, which use their own cellular connectivity when an active plan is enabled.
Why Fi and Tractive require memberships
Fi states that a membership is required to enable Series 3+, Series 3, Fi Mini and Fi Ultra cellular tracking. Tractive likewise requires an active subscription to send location data over cellular networks.
The subscription is therefore not simply a software upsell. It is part of the communications architecture. Compare the recurring cost against how often you actually need remote tracking.
Radio systems are the real no-fee alternative
Dedicated handheld GPS/radio systems can provide true off-grid tracking without a monthly cellular plan, but the owner carries a separate receiver and pays much more upfront. They are a different use case from consumer collar trackers designed around a phone app.
Decision rule
Choose subscription-free only if its communication model fits your environment. If your priority is broad-area escape recovery with a phone app, compare cellular trackers on network coverage, battery burden and total subscription cost instead of trying to eliminate the fee at any cost.