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Off the Leash
Fi Series 3+ Smart Collar, medium

Fi

Series 3+ Smart Collar, medium

£££WearablesGPS smart collar

A GPS dog collar with the tracker built in, and the first year of membership included. Best for tracking, ID and visibility and extra peace of mind on walks.

Why we picked it

With Fi the collar is the tracker, so there is nothing clipped on to snag. Live GPS and escape alerts come from virtual fences you set in the app, and the first twelve months of membership are included. Its behaviour tracking goes further than most, logging activity, rest, barking, licking, scratching, eating and drinking. It has a light for dark walks and works with an Apple Watch as well as iPhone and Android.

View on Amazon

Where to buy

Sold on Amazon. Live UK retailer price comparison will appear here once retailer pricing is available.

Affiliate link. As an Amazon Associate, Off the Leash earns from qualifying purchases.

Is the Series 3+ Smart Collar, medium right for your dog?

Best for

  • Tracking, ID and visibility
  • Extra peace of mind on walks
  • Owners of adventurous or roaming dogs

Who this suits at a glance

Dog size
Check the device weight against your dog's size. Small dogs need a light tag or tracker.
Age fit
Any life stage, especially reassuring for adventurous or recall-in-progress dogs.
Use case
GPS tracking, smart ID and being seen on darker walks.
Personality
Roamers, escape artists and off-lead adventurers benefit most from a tracker or smart tag.
Breed fit
Sized by device weight, not breed.
Value verdict
This is a premium wearable. A premium pick, and the features earn it.

Breed suitability

Wearables are chosen around behaviour and dog size rather than breed. Adventurous, roaming or off-lead dogs benefit most from a tracker. Small dogs need a lightweight tag or device that won't weigh down the collar.

The details

Overview

A GPS dog collar with the tracker built in, and the first year of membership included.

GPS tracking, smart ID and being seen on darker walks.

Sizing & fit

Check the device weight suits your dog's size and that it attaches securely to the collar or harness.

Dog size: Check the device weight against your dog's size. Small dogs need a light tag or tracker.

Life stage: Any life stage, especially reassuring for adventurous or recall-in-progress dogs.

Specifications
Type
Collar with built-in GPS tracker
Tracking
Live GPS with escape alerts
Behaviour
Activity, rest, barking, licking, scratching, eating, drinking
Light
Built-in LED
Compatibility
iPhone, Android, Apple Watch
Size
Medium collar, XS to XL available
Membership
First 12 months included, subscription after

Taken from what the maker states. Measure your dog stretched out, nose to tail, and add room to turn round before you pick a size.

Care & materials

Look for weatherproof, rechargeable devices with a secure collar fixing.

Keep it charged, wipe clean and check the attachment regularly.

Price & availability
Price band
£££
Sold at
Amazon
Category
Wearables

This is a premium wearable. A premium pick, and the features earn it.

Common questions

Is it suitable for small dogs?

Check the device weight, because small dogs need a lightweight tag or tracker that won't weigh down the collar.

Does it need charging?

Most trackers and smart tags are rechargeable. Check the battery life against how you'll use it.

Is it weatherproof?

Look for a weatherproof rating if your dog walks in all conditions, and check the collar fixing is secure.

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