As one of the most enduringly popular and diverse genres on mobile, we've covered the finest Android strategy games quite often.

But the thing with the biggest and best strategy games is that they tend to be extremely meaty, dare we say 'hardcore' experiences. And those tend to cost money.

So what about those Android strategy games that don't (or needn't) cost you a penny? That's what this list is dedicated to.

Naturally, in-app purchases play a part in the following strategy games. Some will only grant you the full package when you pay up. But all of these strategy gems will provide you with a satisfying strategy experience for no up front fee.

Is there a free Android strategy game that you feel should be on this list? Let us know in the comments below.