Scan your cards
Lay them out two rows of four, flat, with a small gap between each one, and hold the phone upright so all four edges are in the picture. Eight in a single line makes a long thin photo and the numbers come out too small to read safely. Stack your paper piles in the same order as the numbers — across the top row, then across the bottom. Never tear or cut joined packs apart. Mixing colours is fine; each strip is sorted into its own game automatically. More than eight and the photo comes back for a retake, which normally costs you nothing.
One photo at a time — scan it, check it landed, then shoot the next. Go in game order (Game 1 cards first, then Game 2) so your piles match your photos, and afterwards check every number against your paper strips before you play.
📸 Up to 8 strips per photo — two rows of four, phone held tall.
Fill the photo. Only got 4 strips in there? Put 4 more in, even if they're a different colour — the app sorts each strip into its own game for you, and a half-empty photo costs the same scan as a full one.
Lay every strip out flat and apart. Peel them off each other so none are curled, folded or overlapping — a strip lying on top of another hides numbers, and hidden numbers can't be read. A small gap between each one is all it takes.
Keep your paper in the order you shoot it — top row left to right, then the bottom row. That's the order the app reads them, lists them, and points to when you win.
🧽 Wipe your camera lens on your sleeve first — a fingerprint is what blurs most photos, and a blurry photo still costs a scan.
⏱️ Reading a photo takes about 30 seconds, sometimes up to a minute — every number is checked twice.
Pick several photos at once if you like — each one uses a scan, and they're read one at a time in the order you took them.
Easier than a laptop camera — shoot with your phone, check the numbers here.