BassDaddy
What brand and model are people using? I was going to get and Android tablet anyway so if I can see what people are getting the app to work on that would be great.

Any should work. I have Samsung phones. The issue is probably router related. I need help on how to check port 47809, but so far no one's offered any.
 
Here's my SO3 log:
 
2017/12/24 08:55:34.185 [Warning] (Studio One): UCNET:Enabled UDP multicast on official port 47809 (1 sockets)
2017/12/24 08:55:34.185 [Warning] (Studio One): UCNET:Local UDP port bound to 60602 (1 sockets)
2017/12/24 08:55:36.648 [Warning] (remoteservice): UCNET:Started listening on TCP port 49720 (1 sockets)
2017/12/24 08:55:36.649 [Warning] (remoteservice): UCNET:Server "Studio One/3.5.2.44603 Win x86" registration reply received.

Here are a couple of things to try:
 
A really simple thing which I sometimes forget: After opening the StudioOne Remote App on the iPad, you have to press the big "Studio One" button at the top of the app (should have the PC name and IP Address). This presumes the iPad and Studio One made a connection. Do you actually see this?  Also, try pressing the "scan" button a couple of times if the iPad app doesn't find Studio One.
 
On your PC, you can use the "Task Manager" to look for the network connection between Studio One and the iPad:
- Open Task Manager.  
- Open "Performance" tab, at the bottom click on "Resource Monitor",  then click on the "Network" tab. 
- Several performance windows will open.  In the "Network Activity" window there should be a row with:
    "Studio One.exe"  <process id> ... <your iPad name>.  
-  If you don't see that, it sounds like the network connection isn't being made.
-  FYI, on my computer the active port, for the remote control app, is port 49789.  Port 47809 is shown as open by Studio One, but it's not very active.  NOTE:  the number 49789 seems somewhat arbitrary and probably is assigned when the iPad and Studio One connect.
 
My system is Win7 Pro, but this shouldn't make a difference.  Luckily for me, the Studio One remote iPad app connected on the first try.  I was quite impressed.  The good news, once you get it working, the remote control app works well.
 
Hope this helps.
 
Edit: In the Resource Monitor "Processes with Network Activity" window, check the "Studio One.exe" box to filter-out data from other processes.
 
P.S.  Soens, saw you post on Studio One forum too.  I replied there with updated observations.

Thanks Tom. The "big Studio One button at the top" is what's missing and thus my delema. Will try your suggestions when I get home.

Seems there's no connection.
 
Network Activity:
Studio One.exe; PID 15980; Address 255.255.255.255; Send 34; Receive 34
 
TCP Connections:
<empty>
 
Listening Ports:
1. Studio One.exe; PID- 15980; Address- IPv4 unspecified; Port- 47809; Prtcl- UDP; Firewall- Allowed, not restricted*
2. " " Port- 50757; Prtcl- UDP; FW- Allowed "*
3. " " Port- 64151; Prtcl- TCP; FW- Allowed "*
*with firewall OFF. Not allowed, not restricted, with firewall ON.
 
Looks like firewall is not the issue.
 
SO RC on my Android phone can't connect either.
 
Since I've never had any remote apps work on my system it may be my router. PreSonus has a list of routers known to not work, mine might be one they haven't tested.
 
Netgear N600 WNDR3400v3 dual band

soens
Seems there's no connection.
 
Network Activity:
Studio One.exe; PID 15980; Address 255.255.255.255; Send 34; Receive 34
 
TCP Connections:
<empty>
 
Listening Ports:
1. Studio One.exe; PID- 15980; Address- IPv4 unspecified; Port- 47809; Prtcl- UDP; Firewall- Allowed, not restricted*

those IPv4 addresses look weird to me, but i can't check mine until this evening