With our Covid-aware policy of allowing subscribers to share our material with their students (no charge), this offering is especially valuable.
Students can practice rhythm performance and instrumental technique on a smart phone/tablet or Chromebook. Unlike sending the students home to study a rhythm sheet, the RB format keeps the student in the right place in the music. They cannot get lost.
As soon as Apple allows production and sales of Ios applications (for Iphone and Ipad) outside of their economic universe, we will also produce that application. A recent court ruling gave some hope for that change in Apple's policies. Relief may be just around the corner.
All the best for a great return to normal.