Fi Mini: Specs, Price, Pros & Cons
Fi built its trackers for dogs until this one. The Mini is the company's first cat-compatible GPS tracker, and it gets there by shrinking: a small puck that slides into a silicone sleeve or strap on an ordinary collar or harness, where the Series 3+ needs Fi's own collar band. For a small dog or a cat that goes outdoors, that change matters more than anything else on the sheet.
It works the way Fi's larger tracker does. GPS provides the fix, an LTE-M cellular link sends it to the app, and Bluetooth lets an existing Fi Base take over at home so the tracker can save power. Safe Zones act as virtual fences and send an alert when a pet leaves, and Lost Mode speeds up location updates until you find them. Activity and rest tracking come for both species. The AI behavior tracking that watches scratching, licking and barking is for dog profiles only.
The membership is part of the purchase. Fi sells the tracker and the plan separately, the plan unlocks the app, and it starts when you activate the tracker or seven days after shipping, whichever comes first. Anyone comparing it with a Bluetooth tag should count that running cost before the hardware.
The practical limit is charging. The Mini charges over USB-C, which is simpler than a dock, but the sleeve covers the port, so the tracker comes off the collar every time. Fi also publishes no charging time, no update interval and nothing about coverage outside the US for this model, so those rows stay empty below.
Category strengths
Where the Fi Mini beats the median
- Much longer battery life ?60 days vs 37 days (median)
- A lighter build ?16 g vs 28 g (median)
- Has suitable for cats ?
Where the Fi Mini trails the median
- Fewer connectivity options ?
How this VS Score was computed
Score 77: each known spec is measured against the median of all gps pet trackers (4 products), then weighted; 50 means level with that median. In classes of six or more, a value beyond the class’s 10th–90th percentile range counts as that limit, so one extreme product cannot set the scale. 26% of the scoreable weight could be used; unknown values, features not applicable to this class and proxies (battery capacity where a rated life exists) add or remove nothing.
| Specification | This product | Cohort median | Score weight | Points moved |
|---|---|---|---|---|
| Battery life | 60 | 37 | 1 | +31.0 |
| Weight | 16 | 28 | 0.8 | +30.4 |
| Suitable for cats | Yes | 50% of the class have it | 0.4 | +20.0 |
| Connectivity | 2 | 3 | 0.5 | −8.5 |
Not scored: Live tracking (standard for the class (100% have it)); Update interval (unknown: not scored); Positioning systems (unknown: not scored); Virtual fence (standard for the class (100% have it)); Escape alerts (standard for the class (100% have it)); International coverage (unknown: not scored); Subscription required (standard for the class (100% have it)); Monthly fee from (unknown: not scored); Charging time (unknown: not scored); Replaceable battery (too few comparable peers (2, need 3)); Waterproof (standard for the class (100% have it)); Find-at-night light (unknown: not scored); Sound beacon (unknown: not scored); Activity tracking (standard for the class (100% have it)); Sleep tracking (standard for the class (100% have it)); Health alerts (unknown: not scored); Family sharing (unknown: not scored).
Editor’s note
Weight is the Mini's whole argument, and it is a strong one. At 16 grams it is light enough that a cat owner can consider a GPS tracker at all, which the chunkier dog units never allowed. Fi rates the battery at up to two months per charge, and its own figures for the bigger Series 3+ suggest the best case assumes a pet that spends most of the day at home within range of a Base.
For cats I would keep expectations modest. The cat profile gets location, Safe Zones, activity and rest, and a timeline of trips beyond the Safe Zone. It does not get behavior tracking. A GPS fix also depends on open sky, so a cat under a shed or in a neighbor's garage may appear late or roughly placed. Every GPS tracker has that problem, and it matters more for animals that hide.
The attachment deserves a thought too. Fi says the strap and sleeve fit collars from about three-eighths of an inch to an inch and a quarter wide, and it advises against non-slip collars with no buckle. It says nothing about breakaway cat collars, so if your cat wears one, check the fit before relying on it.
Against the Tractive DOG 6, the Fi is lighter and lasts far longer between charges on paper, while the Tractive lists a sound beacon and a night light that Fi does not list for the Mini. Against Fi's own Series 3+, the Mini gives up the built-in collar band and the longer rated battery in exchange for fitting any collar and any pet.
Owners of big dogs who want the longest rated battery should look at the Series 3+. Owners of small dogs and outdoor cats have far fewer good options, and this is one of them.
Specifications
Quality bars show where each figure sits between the lowest and highest of the 4 gps pet trackers this VS Score is measured against.
Tracking
Battery
Design & durability
Health & activity
Sources and verification
Where the specifications come from
- Official product pagetryfi.com
- Datasheet or manualsupport.fitracking.com
- Independent testingtrailandkale.com
- Retailer listing (cross-check)amazon.com
Verification
- First published
- Specifications last checked
- Sheet completeness
- 14 of 23 specifications verified; the rest show as Unknown and are never estimated or scored
- Page type
- Product specification page — Compiled from the manufacturer’s published specifications and the cited sources; this is not a hands-on test.
- Basis
- Research-based: specifications and editorial text were compiled from the documents listed here and the manufacturer’s published data. We have not tested this unit ourselves; where independent measurements are mentioned they belong to the linked publication.
Where to buy
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Price history
GPS Pet Trackers with similar specs to the Fi Mini
Ratings & reviews
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The bottom line
The Fi Mini earns a VS Score of 77 on the 26% of specifications we could compare like for like — an indication, not a ranking.
- Who it’s for
- An owner of a small dog or an outdoor cat who wants live GPS location and escape alerts on a tracker light enough for the animal to ignore.
- Who should look elsewhere
- Anyone who will not pay a recurring membership, since the tracker needs one to work, or who wants a sound or a light to find a pet in the dark.
- The trade-off that matters
- Cats get the location half of Fi's app and not the behavior half, so a cat owner gets a narrower set of features from the same membership.
- The main alternative
- Tractive DOG 6: heavier, but it adds a sound beacon and a night light for dogs that slip out after dark.
The VS Score is calculated from the weighted specifications above, each measured against the median of comparable gps pet trackers — a shortlisting guide, not a substitute for your own priorities. See how we score.