One A4 sheet, 25 cards. Keep the deck sorted by the small corner numbers and always hand out from 1 upwards. If the Print button doesn’t respond, press Ctrl+P (or ⌘P).
Pick
Timer
3:00
3:00
Cards in play
Tap a card to choose it. Long-press (or right-click) to mark it missing; do the same again to bring it back.