Edplus always remembers your child's ability level, no matter the device.
Yes. edplus is a fully-functional cross-platform service.
If you download the edplus app on the new device and enter your username and password on the "Sign In" page, your child can continue to play and learn using their own unique personal profile, picking up exactly where they left off. The edplus algorithm will remember your child’s ability level.
Moreover, for the standalone edplus games apps - Seal Saver, Match Shake and Planet Zorg - their game level is remembered cross-platform too! This means that if they were on Level 50 on Planet Zorg and break their tablet, they can immediately return to Level 50 on a different device.