Just a quick note while we try to troubleshoot iOS app issues: you can always access the controller by using a web browser (Chrome etc.) and directly typing in the IP address into the browser. At least this allow you to continue using the controller while we troubleshoot the app. At the moment Samer and I neither of us can reproduce the issue: we’ve tested on iPhone 5, 6, X, iPad, and they all access the test OpenSprinkler fine without any problem. So we are still looking to reproduce the problem to begin the troubleshooting.