Hi, I am a Malaysian App Developer, and my team and I are currently in midst of developing an iOS app, and have come across a few questions which I hope macrumors will be able to answer. 1) We have found that most POS Apps listed within the following article, Best iPad Restaurant POS Systems of 2016 | Top Ten Reviews, do not utilize the IAP for their monetary transactions. We have examined each App individually, and have found that their transaction methods range from Customized Payment Systems, Membership-Based Payment Systems, to Portal-Based Payment Systems. Considering Apple Inc's stance on Transactions, App Store Review Guidelines, Clause 11: Purchasing & Currencies, is their method of Monetary Transactions considered to be transgressing Apple Inc's standing policies and/or is illegal ? 2) We have also found out that Genius Pos, is hosting some previous iterations of their App in Page on mobi-pos.com which cannot be found in the Apple App Store, which will always display the latest version of the app. The normal method of installation of these previous iterations on an iPad Device still applies, even through it is using a non-app store approach, on top of the aforementioned Transaction Methods above. Considering the previously mentioned circumstances, and the fact that the developers have allowed their Customers access to the ability to Roll-Back their App, by extension, could this be considered another transgression towards Apple Inc's standing policies as well ? Please kindly advise on the queries that I have raised and explain in detail, if their actions are completely illegal or the result of abusing a loophole within Apple Inc's policies.