I haven't come across any in-app purchase requirements.
Advertising is optional - you can get coin rewards for watching promo vids for other freemium apps.
As a game I like the design but it's one of those "gah, just one more go" time suckers.
(
wakeupandsmellthebacon, Tue 9 Dec 2014, 16:17,
Reply)
Will have to wait for the Android version and might give it a shot then.
(
Fadgebadger Sweaty sumo wanks for everyone!, Tue 9 Dec 2014, 16:19,
Reply)