I used the wallaby app on android for keeping track of quarterly bonuses for credit cards etc.

It would tell you which of your cards is the best to use at any particular merchant or category- it even could keep track of category bonuses with spend limits and let you prioritize cards to meet bonus offers, etc.

It seems that the app is no longer updated- it doesn't show Discover's current Amazon 5% bonus, and it doesn't have the updated Amex Gold reward structure. There's a note that they've sold to thepointsguy, but thepointsguy's app is only for iOS right now.

Does anyone know of an alternative online service that does something like this?