For people who can't connect with Omna cam, here are some hints.
The problem might be your network, not the camera. We all have to understand that we only get simple solutions when we're all behaving in a standard way, so if your network is slightly custom you may have problems.
So here's the situation. I unpacked and connected the cam and downloaded the app (not really necessary if you have HomeKit). The light turned flashing orange, and I clicked on Add. Nothing happened, and the cam won't connect at all. However, what I noticed on my IPscanner, the device briefly appeared on my network and then disappeared as connection was refused.
Explanations and workaround.
My LAN uses timed access and IP filtering + DHCP with fixed IP reservations. The cam won't connect to such network so we need to manipulate the LAN to let it work. The workaround below applies for an Apple router. You may find a similar solution for different routers yourself.
1. Set "Every day - All Day" access temporarily ON (if you're using timed access and your "Every Day - All Day" is = "No Access")
2. If you're using fixed IP only, it probably won't connect. Switch it off or use DHCP + IP reservation
3. Reboot your router
4. Try to connect the cam - it should work
5. Use any IP scanner or your router utility to see Omna IP and MAC address. It should appear as DSH xxx xxx on yor network where xxx xxx are last 6 numbers of the cam's MAC. Save or write down MAC and IP. NOTE that the MAC written on my cam's box was different from the real MAC so don't trust the box.
6. Go to your router and enter the info about your Omna into MAC filtering and timed access as you wish. Check if the IP it found doesn't conflict with other IP reservation and change it if it does.
7. Reboot the router. The camera should connect automatically. Check if it does using your IP scanner or router utility.
Just to note that MAC filtering + timed access is the most secure network configuration that you can have, even without password. However, you have to be conscious that it'll always require some manipulations when you're adding a new device or reconfigure your LAN. Please, don't blame manufacturers right away - they want to make life of 90% of [standard] users easier. So if you're part of these other 10%, just think a little! :-)
Peace