Something not working? Start here — then email us if it's still stuck.
Open Settings → Export save to file. Keep that file somewhere safe. To restore it later, use Import save in the same panel. Importing never destroys your current save until the new one has been written successfully.
The game keeps a backup of your previous save. Open Settings and look for Recover previous save. If your device cleared the app's storage — some systems do this when space runs low — the app restores from its own durable copy automatically the next time it starts.
Open Settings and set Graphics to Med or Low. The game picks a setting for your device at first launch, but you can always override it — your choice is remembered and takes priority from then on.
The game needs WebGL. On desktop, make sure hardware acceleration is enabled in your browser and your graphics drivers are current. If you're running it in a browser, try a different one — that isolates a driver problem from a browser problem quickly.
No. Everything runs on your device, and the game makes no network requests at all. You can play it in airplane mode.
No. There are no ads, no purchases, no subscriptions and no currency to buy. See our privacy policy.
Settings → Start a brand-new game. This erases your city, cash, towers, stores and coverage, and cannot be undone — export a save first if you might want it back.
The most useful bug report tells us three things: what you did, what you expected, and what happened instead. Add your device and the build number from Settings, and a screenshot if the problem is visual.