The OrderPort Point of Sale applications on Apple devices require iOS (or iPadOS) version 15 or better. We have not yet tested iOS 26 or iPadOS 26. Please do not upgrade until you receive confirmation from OrderPort.
iOS 15 was released in 2021. For a list of iOS 15 compatible devices, please see this document from Apple: https://support.apple.com/en-us/103201.
Please note: This document has not been updated with the latest device releases. If you have a newer model than what is listed (eg. iPad 11th gen.), there won't be any issues regarding iOS versions.