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 stackexchange 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 ?
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.