> The ability for an app to persist state and "start" in the last state the user saw has nothing to do with the OS's ability to kill an app to conserve memory.

> The ability for an app to persist state and "start" in the last state the user saw has nothing to do with the OS's ability to kill an app to conserve memory. I'd say it does. Pausing apps (as opposed to killing them) is another way of conserving memory, and battery, while preserving usability. But as you say perhaps Qt5 will handle this. Is the Ubuntu Phone restricted to only running Qt5 apps? I'm not clear on that.