Spec
RAD Roller Original
Chirp RPM Massage Ball
Price
$25
$60
Rating
4.7 ★
4.5 ★
Diameter
2.75 in
3 in
Firmness
8/10
8/10
Vibration
None
4 speeds
Battery
N/A
3 hrs
Weight
6 oz
14 oz
+Spine-safe peanut design
+Stays in place
–Awkward for single points
–Mid-tier price
+4 speeds at $60
+3-hour battery
–Louder vibration motor
–Newer product, fewer reviews