Just signed up for OTF. Do we really need to buy heart rate

Did anyone see this. I don't understand why this would be worth an investment from what we use now (I'm also a chest strap user) : r/ orangetheory

I went to an OrangeTheory Fitness Class and survived – It's Not Hou It's Me

Orangetheory Price and Other Info to Know Before Signing Up - Whimsical September

Looking to make a change?! The time is NOW! Sign up today for only $99! PLUS you will get your OTbeat Heart Rate Monitor for FREE! ($20

armband heart rate monitor soft strap width is 20mm, compatible with most heart rate sensors (ANT+, Bluetooth). Specially designed to work on Orange

4Pcs Heart Rate Monitor Replacement Armband Strap Compatible with OTF, OTF Burn, Orange Theory Fitness, OT Beat Heart Rate Sensor

OTF: Workout Data Export - FAQ

Apple Watch and Orangetheory app (new) integration not showing heart rate info. Is anyone else having this issue and/or know how to fix it? : r/ orangetheory

Honest Review of Orangetheory Fitness - Spoiler: I LOVE IT - Enlightened by Bravery

Orangetheory launches fitness tracker that connects to your Apple Watch - CNET