Could you recommend a mobile/web application to send and receive TTN messages?
Web App = Console - try it, you may be pleasantly surprised.
If it’s on a smartphone, it’s also mobile …
There is one somewhere on the forum, I’m all out of 3rd party searches for this year, feel free to try it yourself!
what does the app have to do
manually or scheduled events i take it is or controlling your class c devices
Controlling class C devices
there are 3 different approaches
build it yourself
get someone to build you a mobile app
or search the web most of the one i have seen are web based