I cannot download a PDF file

PDF files are available for viewing only and cannot be downloaded.

Errors and issues

I did not receive an invoice for the purchase

Cannot click evaluation during learning

The answer key in the handbook does not match the exercises

Cannot activate code on iOS

I cannot download a PDF file

I cannot add a MemoCard

Problems with speech recognition feature

Error with iOS sound

Is there technical support for users?

Error with STT Android (old app) - "The app detects the wrong language in speech recognition, what to do?"

How to report an error or suggestion to the SuperMemo team?