The Fitbit Versa tracks steps and activity as well as calories burned. It has some really cool additional features such as sleep tracking, on-screen workouts and 24/7 heart rate tracking. It is swim-proof and has a good battery life. With compatible phones it will notify you of incoming calls, texts received and upcoming calendar appointments. The Fitbit Versa comes in a number of different colours. It is easily synced to the WW app.

The Fitbit Versa Lite, as the names suggests is the 'lite' version of the popular Fitbit Versa. It tracks steps and activity, calories burned and it easily links to the WW app. It, too, has some great additional features including reminders to move, sleep tracking and 24/7 heart rate tracking. It comes in a variety of colours.

The Fitbit Ionic tracks steps, activity, heart rate, sleep etc but offers so much more than that. It will create personal coaching with on-screen guidance and has built in GPS allowing you to track pace, distance and routes. The Fitbit Ionic allows you to store and play over 300 songs and lets you make contactless payments whilst you are out and about. It syncs easily to the WW app and comes in three different colour combinations.

The Fitbit Charge is one of the cheaper fitness trackers in the Fitbit range. It tracks steps, activity, calories burned, floors climbed etc and syncs well with the WW app. It can be programmed to notify you of calls, texts to your phone etc but doesn't offer any on screen workouts or music access. It comes in a variety of different colours.

The Fitbit Inspire HR and the Fitbit Inspire (without heart tracking) are the cheapest of the Fitbit fitness trackers. The Inspire HR tracks steps and activity and calories burned. It recognises the type of exercise that you are doing and will send you reminders to move if you have been inactive for some time. It can also be set up to notify you of calls, sms etc to your smartphone. It may be one of the most basic of the Fitbit range but it still does the job! It comes in a variety of different colours and is easily synced to the WW app.

The Garmin Vivomove HR will track and display steps, calories, heart rate and distance covered etc.  It also includes a number of wellness monitoring tools including a sleep monitor. The watch has a touchscreen display and will send you notifications of incoming calls, text messages etc. The battery life is good (up to 5 days in its Smart Mode, longer in watch mode) and it comes in number of very tasteful styles. Prices vary depending on the casing and band. 

The Garmin Vivoactive 3 has the normal tracking for steps, activity, calories, floors climbed, distance travelled etc but it also does so much more. It has a number of heart rate features and gym and fitness workouts. If golf is your thing, it includes some golfing features including a digital scorecard and stat tracker. It will notify you of incoming calls, texts etc and offers a contactless payment solution. You are able to sync the Garmin Vivoactive to the WW app.

The Garmin Vivofit 4 is the cheapest of the Garmin fitness trackers. It tracks steps taken, distance covered and calories burned but does not monitor heart rate. It is safe for swimming and showering and has a 1 year battery life. It is available in a couple of different colours and sizes and is able to be synced with the WW app.

The Samsung Galaxy Watch Active will track steps taken, distance travelled and calories burned. It has an integrated heart rate monitor, monitors sleep and also claims to detect stress levels. You can sync it with some phones to stream your music and to notify you of calls, texts etc. It is thin and lightweight and comes in a variety of different colours. At time of writing this post people were unable to sync this watch with the WW app.

The Apple Watch Series 4 tracks steps taken, distance travelled and calories burned. It has an inbuilt heart monitor which notifies you if your heart rate drops or increases abnormally. It automatically detects the particular work out that you are doing such as running, yoga etc and will set personal coaching and challenges for you. This watch does far more than is possible to detail here! It comes in a number of colours and styles and is easily synced to the WW app with detailed instruction on the WW website on how to do this.

The Apple Watch Series 3 tracks steps taken, distance travelled, calories burned etc. It tracks popular exercises such as running & yoga and also can be paired with some popular gym equipment. It monitors heart rate and will alert you if your heart rate is too low or too high. As with the other Apple Watches, this one has too many features to outline here. It comes in a number of different styles and is easily synced to the WW app.

The Misfit Shine 2 tracks steps taken, distance travelled and calories burned as well as monitoring sleep. It is swim-proof and has a replaceable battery that lasts approximately 6 months. It can be programmed to alert you of calls, texts etc. There are instructions on the WW website on how to sync a Misfit fitness tracker with the WW app.

The Misfit Ray automatically tracks steps taken, distance covered, calories burned and sleep. It will vibrate to notify of calls and text messages and has a smart button that can be programmed to control connected household devices. It is swim-proof and has a replaceable non chargeable battery that will last up to 6 months. Instructions on syncing to the WW app are available on the WW website.

The Fossil Women's Gen 4 Venture Smartwatch will track steps taken, distance covered and calories burned as well as heart rate. It can be configured to notify you of calls, texts, emails etc as well as being Google Pay compatible. The watches come in a variety of different colours and styles. It is unclear whether this watch will sync with the WW watch.

The Withings Steel HR Hybrid Smartwatch has automatic step distance and calorie tracking. It recognises over 30 different activities and also tracks heart rates. It can be programmed to notify you of calls, texts etc to your smartphone. It comes in a number of stylish colours. It is possible to link this Smartwatch with the WW app and instructions are available on the WW website.

The Amazfit Bip is one of the cheapest fitness trackers listed here. It accurately tracks steps taken, distance travelled and calories burned. It also has a sleep monitor. It can be programmed to notify you of incoming telephone calls, texts and app notifications. It comes in three different colour combinations. It is unclear whether you are able to sync the Amazfit Bip fitness tracker with the WW app.

The Moov Now fitness tracker is the cheapest tracker in this list. It is a particularly good swim tracker but will also track steps taken, distance travelled and calories burned. It can monitor your heart rate and will report on your sleep patterns. It can be worn on your wrist or ankle. It comes in a variety of different colours. I have been unable to find whether the Moov Now fitness tracker can be synced with the WW app.

The Huawei Band 3 Pro is a relatively new fitness tracker on the market. It will track steps taken, distance travelled, calories burned alongside monitoring your sleep and heart rate. It is water resistant and its touch screen seconds as a camera shutter button for your smartphone! It is also one of the cheapest fitness trackers in this list. It is unknown whether this watch syncs with the WW app.