Most Android apps use standard text field provided by the Android system.
However, certain apps must use a heavily customized text field for certain purpose. For example, email client apps use custom text field to provide rich text formatting functionality.
Such custom text fields do not provide the necessary information for Typing Hero to detect keyword correctly.
If you must use one of those incompatible apps, you can use Snippet Copier to quickly search for a Snippet and copy it to the Clipboard.
The following is an incomplete list of known incompatible apps.
If you find other incompatible apps, please share them to email@example.com so it can be added to the list above.