Not everyone needs a super expensive smartwatch to track his/her activity. The OUMAX T2 Activity Tracker is an affordable Bluetooth-enabled device that works with your iPhone or Android device to monitor your sleep, track steps/calories, and let you know when you have incoming calls and text messages.
This wearable device uses Bluetooth to let you take selfies even when your phone is not in your hands. You also get to sync your data via Bluetooth. Sets you back under $35.