> I am an app developer. How do I protect my users? > We are not aware of mitigation strategies to protect apps against Pixnapping. If you have any insights into mitigations, please let us know and we will update this section.

IDK, I think there are obvious low-hanging attempts [0] such as: do not display secret codes in stable position on screen? Hide it when in background? Move it around to make timing attacks difficult? Change colours and contrast (over time)? Static noise around? Do not show it whole at the time (not necessarily so that user could observe it: just blink parts of it in and out maybe)? Admittedly, all of this will harm UX more or less, but in naïve theory should significantly raise demands for the attacker.

[0] Provided the target of the secret stealing is not in fact some system static raster snapshot containing the secret, cached for task switcher or something like that.