My team is evaluating an iOS companion app for our own network-connected device, and we want to understand whether the planned architecture would likely create an App Review problem under Guideline 2.5.17. Our situation is: We are building our own device and our own companion app. We do not intend to market the device as a Matter-certified device initially. We do not intend to support Apple Home or broad third-party Matter ecosystem interoperability in the first release. We are under a tight schedule and are considering reusing Matter/CSA-derived libraries, data models, and protocol concepts internally to reduce engineering effort and move faster toward eventual certification. Our current understanding is that there are already many iOS apps that communicate with LAN-connected devices using proprietary protocols, so our initial assumption is that a vendor-specific local-network device workflow should generally be acceptable. The point we are trying to clarify is whether that changes if the implementation unde
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