Upgrades & Payment ← Knowledge Base Is the upgrade a monthly subscription? What is included in the upgrade? I upgraded an app on my phone. How do I get the upgrade applied on another device? What is the difference between the free and "Pro" versions? If I restore the upgrade, will I be charged again? Can I apply the upgrade to multiple apps? It says I haven't purchased this app before, but I have My credit card was charged more than the app price How can I see what I've purchased in the past?