Jartecs produces high quality free games and apps for smartphones and tablets. The gameplay or app functionality is never dependent on purchases through an in-game-store or forced waching of commercials.
The games are intended for children and adults alike. Something to enjoyably pass the time while waiting at the bus stop, the airport or during a long car or train ride.
This is also why data connection and WiFi will not be asked for unless it is part of the gameplay. A lot of what differs between Jartecs games and what else is out there, is what is not there; like asking for identity, Facebook account, contact list, or using commercial banners and in-game store.
Apps and Games are, when possible, aimed to work on all active devices. So you don't need the newest hardware to use them. Not everyone can nor should buy a new device all the time.