On iOS when reviewing in landscape mode the system clock is not visible. As both top and bottom bars are already customizable, it would be great if a clock could be placed there.
Rationale
While there are add-ons for pomodoro timers and what-not for Anki Desktop, this is often way more than needed. A simple clock to not get lost in time is very useful to pace yourself during review sessions. I also hope adding a clock wouldn’t be a huge change.