MY CALLS ARE BEING RECORDED FOR 30 SECONDS ONLY.WHAT IS TO BE DONE TO GET FULL VERSION OF THE RECORDER
The free version doesn't have the "auto record calls" feature, you should click the in-call button to manually start recording, the recording has no limit (indeed limited only by your disk space). In the free version you can test the "auto record calls" feature, during test it records only 30 seconds every time.
Please open the "About" screen in the app, click the Buy Now button to buy a license to upgrade to the pro version, then the "auto record calls" feature will be available at once, and the 30 seconds limit will be removed.