Does Rhythm Lab require a subscription? January 19, 2018 by Jonathan Ensminger No. Once you purchase and download Rhythm Lab, there are no more fees to pay, ever. Does Rhythm Lab have in-app purchases? Jonathan Ensminger Related articles AirDrop and Rhythm LabRhythm Lab 3.2.4Custom Tuplets TutorialFAQs added to websiteRhythm Lab 3.2 is here…Rhythm Lab – Good MentionsNew website design