The Piggy Bank is a bonus feature that appears from time to time during play. You can use the Piggy Bank to automatically save up a cache of bonus Tokens which can then be purchased (like a Token Pack) at a discount price.

While the Piggy Bank feature is active, every puzzle completed will add extra Tokens to the Bank. (You will still directly receive any Token rewards earned during play - the Tokens added to the Piggy Bank are awarded in addition to this.)

Once there are at least 200 Tokens in the Piggy Bank, you can make a real money purchase to open the Piggy Bank and claim the Tokens.

You can see how many Tokens are currently in the Piggy Bank by tapping the Piggy Bank icon that appears in the status bar area.

Please note that the Piggy Bank does not affect the normal Token rewards that you will receive during play - there is no penalty for choosing not to use the Piggy Bank feature.