Between them, Ketchapp and Voodoo pretty much rule the free iOS games chart. Both have a handy knack of churning out simple, bite-sized, casual time wasters that don't demand too much of the player.

Given their ongoing success and seemingly shared values in this competitive part of the market, we thought it would be a good idea to round up some of the best examples of their craft.

Here, then, are 25 of the best casual treats from Ketchapp and Voodoo. While they may be numbered, they're in no particular order of preference.