Please add Croos-divice synchronization – USMLE Step 1 Practice Q&A Review

I own all of your apps and also i pay for the in app pucharse, but i have another divices but i cant have my progress of other divices. please can you make something like add Croos-divice synchronization? we all pay for your content, please help us
Review by Charls DD on USMLE Step 1 Practice Q&A.