Speed of the ios app has been mentioned several times in different areas of the forum and I have commented a couple of times. I want to mention the subject again since I've not seen recent conversation.
Before the BIG update, if the app was running in the background it would become "live" almost immediately. A fraction of a second. I could send the commands I needed to using my iphone, then simply put phone to sleep so the screen wasn't on. Then I would simply turn it back on...the app would be LIVE immediately AND it would be at the same screen I left it. If I used another app on the phone but left the c4 running, I could go back to c4 and it again would be LIVE and at the same screen that i last used. Was VERY convenient.
While the performance of the app has improved some it is no where near what I described above. If i use a different app the c4 app is likely to disconnect. When I go back to it it must again fetch the system info. Then I must select the bar that appears at the bottom to actually open the screen for the current activity or device in use. Before, I could use another app or turn the phone off, and when I went back to the c4 app, it would connect immediately AND be on the same screen of the device in use. I could use it instantly.
I know 2-3 seconds and then the need to press a button to get to the screen your were on doesn't sound like much but when there is a need to pause, stop or perform another function it becomes quite inconvenient. I use several other apps that stay connected or connect immediately. I know that all apps are different and need to perform different tasks but it worked before...I've gotta believe it can happen again!!