Try a single edition for 69p with an in-app purchase.

The game does have in-app purchases, but they're not aggressively marketed at the player.

The 205 and 103 trains are available as in-app purchases.

If so, it actually is very similar to any other type of in-app purchase from Apple's perspective.

The games were offered for free with in-app purchase to unlock the entire game.

It was released as a free game with additional in-app purchases.

You can also buy all 100 games for a single $14.99 in-app purchase if you're so inclined.

Although a free app, customers are able to buy in-app purchases.

Several of these are included with the application, while others may be acquired through an in-app purchase.

There is an in-app purchase to remove the ad for $0.99.