There are plenty of smart fitness trackers on the market. Not all of them are ideal for weightlifting. The FORM Collar is different. It uses 3 sensors to measure barbell lifts. The device knows when it is attached to the bar and gives you feedback on each and every lift. You also get to compare your results against others.
With cloud storage, you get to review your data at your convenience. FORM Collar lets you track your max hip drive for each lift and syncs to your phone via Bluetooth. You can find out more about it on Kickstarter.