Keep Screen Awake
Keep your screen from going dark: one button, a timer, and a full-screen clock.
The screen turns off as usual.
The button keeps your screen awake while this tab is open. Nothing to install and no phone settings to change: the browser asks the system not to dim the screen, and lets go when you press it again.
After switching away, the lock returns
The system lifts this lock as soon as you switch to another tab or minimize the browser, and does not restore it on its own. Tools that ignore this lie: the switch still reads "on", while the screen is already going dark.
Here the tab coming back is detected, and the lock is taken again. You can see how many times this happened next to the running time.
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