IVR allows callers to enter prompts so they're immediately directed to the right department. IVR systems are an example of computer-telephone integration (CTI). The most common way for a phone to communicate with a computer is through the tones generated by each key on the telephone keypad.
Interactive Voice Response (IVR) is an automated telephony system technology that interacts with the callers, gathers the required information and routes the calls to the particular appropriate recipient.
Yes you need to use Tringer ivr android app for setup purpose.
You need to use Tringer ivr setup app.
You can use mobile default recorder or use some website for text to speech converter here it is one like that url: https://www.indiadict.com/web/text-to-speech.html.