Currently you can only use the Mobile App on Apple devices. We are working on offering SPITCH on Apple devices for Mobile-Web as well.
The individual pairings are offered until the first game of a player from the pairing is whistled. It is therefore only possible to participate before the kick-off of the corresponding match. If the player’s team is already playing, the pairing will no longer be offered for participation. You need at least three pairings to complete a participation.