Pentagrom is perfect for Movable Do! In fact, it was born out of trying to integrate Movable Do with the traditional method or Fixed Do. When using Pentagrom, you can hear
what you play in relative terms, but if you look
at the screen you’ll be seeing what you’re playing in absolute terms. You’ll be able to do the transition from absolute to relative as smooth as…well, as looking.
If you’re interested in learning more about this, you may want to read this detailed article Jaime (Pentagrom’s inventor) explained at the Spanish National Congress of Music Conservatories. Disclaimer: this article is meant for musicians, therefore the language may be too technical for non-musicians..