With Jawbone's Up3 fitness band now shipping, the company has announced its latest offering, the Up4, which comes with an NFC chip that allows you to tap and pay directly from your wrist.

Jawbone Up4

At this stage, however, only American Express cardholders can avail the mobile payments service. The Up4 will be available sometime over the summer for $199, $20 higher than the asking price of the Up3. The fitness band has a similar feature-set on offer as the Up3, which includes heart rate monitoring, sleep tracking and differentiating between various forms of activity. Jawbone's Up app also comes with a coach feature that motivates you to achieve your daily workout goals.

Eligible American Express customers will be able to link their cards to the fitness band through Jawbone's Up app, which is available on Android and iOS. Transaction history will not be shown in the Up app, however, as American Express has mentioned that sensitive customer data will not be shared. As for security, the mobile payments solution uses a tokenization system that is similar to the cloud-based tokenization system Google uses for its NFC-enabled payments service.

While the Up4 offers a convenient way for existing American Express customers to pay from their wrist, lack of support for other vendors will be a roadblock for most potential buyers. This isn't the first NFC-enabled wearable we've seen, with manufacturers such as LG set to offer the Watch Urbane LTE, which also has tap to pay functionality via NFC along with standalone LTE connectivity.

In addition to the Up4, Jawbone also unveiled a budget fitness tracker, the $99 Up2, which is the successor to last year's Up24. The Up2 features a similar design as the Up3, and while it offers more features than the entry-level $50 Move, the band comes without a heart rate monitor. The Up2 is currently available in a Black Diamond variant from Jawbone, and will soon go up for sale at Amazon and Best Buy.

Buy Jawbone Up2

Source: Jawbone