Open this on the phone that sleeps, ideally the same way you open the game — from the
home-screen icon if that is how you play. Press the button, put the phone down, and leave it.
If the screen dims or locks while the counter is running, the answer is on this page.
Checking…
—
not holding
What this device reports
Event log
Every acquire, release and visibility flip, with the time it happened. A
release you did not ask for is the interesting line.
What each verdict means
No Wake Lock API — this browser cannot keep the screen on at all. On iPhone the
API arrived in iOS 16.4; before that no web page can do it. The game silently does nothing,
which is why it looked like HTTPS had not helped.
Not a secure context — the page is on http://. The API only exists on
HTTPS. Both terratd.com addresses redirect to HTTPS now, but a home-screen icon saved
earlier can still open the old address; delete the icon and add it again.
Request refused — the API exists and said no. Low Power Mode is the usual reason on
iPhone; the log will show the error.
Held, and released on its own — the lock was granted and the platform took it back.
The log timestamps tell us what took it, and the game now re-requests when this happens.
Held the whole time and the screen still slept — then it is not the web page. Check
Settings → Display & Brightness → Auto-Lock, and Low Power Mode.