How it works: pop the big bubble to open the map. Dog Park, Duck Pond and Farm open one after another; each asks for three little picture goals and earns a sticker. Free Pop is the endless game with no goals.

No sound? Check the silent switch or Control Center mute, and turn the volume up.

Install: tap Share, then “Add to Home Screen”. Everything is inside this one page, so once it has loaded it keeps playing without internet.

Privacy: no ads, no tracking, no accounts, no links out. Settings, the zoo and level progress are saved only on this device. The sticker book picture is drawn here and goes only where you send it.