Last week we implemented the the new Amazon in-app payment system into the Android and Kindle versions of Professor Palindrome! and Professor Zombie! Each now include ways to remove adds, purchase extra “Instant Solves” and add extra time. The Amazon In-App Payment system uses Amazon.com accounts to purchase in-app items. Previously the Android versions of the games did not include any way to get extra Instant Solves or to remove the network ads. Each game also features several bug fixes and performance improvements.
You can download the new versions (still free) here:
Professor Palindrome! http://www.amazon.com/Producto-Studios-Professor-Palindrome/dp/B009BS0EBC
Professor Zombie! http://www.amazon.com/Producto-Studios-Professor-Zombie/dp/B009BTBRWQ