Outdated app with ios 11

[Wristpin]

I have an app on my IPhone I use for setting up my sat dish when we camp and apple has blocked it from working with ios 11
The original developer of this app has long since closed their website ad has not updated the app, Is there anyone here that can update app's?
The app is DP AR PRO (dp short for dishpointer)

Is app is the only app that is very accurate when showing the satellites position in the sky
please help if you know someone that can update it.
Thanks

[Bryanlocksmith]

If the app is not in the appstore anymore unfortunately you can't do anything anymore even if you have the app installed or pending in the installation