Should I use ANT+ or Bluetooth?

Sensors and connection

ANT+ and Bluetooth are two different ways to connect sensors and trainers. The best option depends on your phone, adapters, and the devices you use.

If your phone does not have built-in ANT+, you will need a compatible adapter to use ANT+.
Bluetooth is usually simpler, but it can be blocked by another connected app.
ANT+ can allow several devices to read the same signal at the same time.
If one protocol fails, try the other if your hardware allows it.
Avoid connecting the same sensor twice via ANT+ and Bluetooth unless you know exactly what you are doing.