HTC has teamed up with Under Armour to launch UA HealthBox, a collection of three devices that it hopes will allow you to better monitor and track your activity, sleep, fitness and nutrition.

The set, which will go on sale on the 22 January in the US, and by the summer in the UK, will comprise of three devices: a wearable band, a heart rate chest strap, and a connected scale. They will be powered by Under Armour's fitness app, UA Record.

"This system contains everything a consumer needs to better manage their health and fitness," Wolfgang Muller, executive director connected products at HTC explained to Pocket-lint. "Whether you are a high performance athlete or simply committed to improving your health, UA HealthBox is the only system that delivers the complete picture and provides the information and motivation needed to achieve your goals."

The two companies are hoping that by offering a complete solution, they can make their mark on what is already a crowded market dominated by the likes of Fitbit, making it a one-stop shop for everything.

The collection, which will only be sold together initially, will cost $400, although HTC has told Pocket-lint that it expects that over time it will start to sell the UA Band, and the UA Heart Rate strap separately.

The UA Band, which looks very similar to the Nike FuelBand launched a few years ago, will double as a watch, and come with a hidden black and white display that disappears when not in use.

Available in black with a red textured underside, the band not only tracks the number of steps you take throughout the day, but will also track your sleep, and wake you based on your sleep patterns when requested. It also has the ability to take your resting heartbeat moments before you wake up, and record your activity.

The UA Heart Rate is a more precise heart rate monitor that has been designed to compliment the heart rate sensor in the UA Band, giving a much more specific set of data points when you are out on a run or doing exercise. You don't need to wear it all the time, but HTC is recommending it for enhancing sport recording.

The final piece in the hardware puzzle is the UA Scale. The gloss black scale is Wi-Fi enabled, automatically connecting data to the UA Record app on your phone, giving you a breakdown of your weight and body fat percentage.

The scale can support up to eight users and syncs with the UA Record app for individuals to view trends with weight as part of their overall dashboard.

Where the system has the potential to succeed is by tapping into Under Armour's huge pool of app users. The company already owns apps like MapMyFitness, and rather than insist you ditch those services for UA Record, you can, and are encouraged to, use the apps in tandem.

It means that you'll be able to get an accurate daily count of your sleep, your exercise, and your calorie intake. The app also encourages you to record things like how you are feeling so you can really start to build a picture of your health.

With a simplified approach and a complete out-of-the-box solution, from our brief time with the UA HealthBox, there looks to be masses of potential here. However, with a $400 price tag, presumably driven by the cost of the scales, this isn't going to be an impulse buy for most.

If HTC and Under Armour can convince consumers that the system works, they could have a success on their hands. But with such market dominance from existing players, that's going to be a tough sell.