A Quick Look at In-App Voice Calling API with Work Strategy

audio call api

Communication technologies like app-to-app calling are driving higher user engagement for businesses. The use of in-app calling solutions is growing at the rate of 23% per annum because ‘communicating’ with customers is easy and cost-effective. 

Listeners were found to be attentive and speakers more accurate in conveying their emotions via voice-only calls, in comparison to visual and multimedia channels of communication.

Quickly switching to consumer experience enhancing services like app-to-app calling can only multiply your business! In the following sections let us look at the working of in-app voice apps and how your company can benefit from it…

What is In-App Voice Calling?

In-app calling is the specialty to integrate voice calling capabilities from within any app that is built. Voice over Internet Protocol(VoIP) with audio call API is used to connect the call directly to the receiver. Hence, these are called in-app calling or app-to-app voice calling, and even data calling.  For example, a rider can make an in-app call to the cab driver, ensuring his phone number is not revealed. Secondly, he will not have to pay the regular call charges to his network.  

6 Industries that are Using App to App Calling

Theoretically, the power of app-to-app calling is seen in the way old methods of calling are being replaced by  new business processes in many industries. Some  of them are discussed below: 

Marketplaces – Earlier websites and emails were formal connectives for buyers and sellers. However, with the use of in-app calling, all stakeholders – suppliers, buyers, sellers and peers are connected on the same platform. 
Financial Institutions – Voice API and SDKs – are extensively being used in banking apps, insurance service providers’ apps to resolve doubts of online investors and personalize their experiences with in-app calling.
Cab aggregators– In-app calling is effective in sorting issues for disgruntled customers using cab aggregators or to connect drivers and riders without having to pay for the calls.
Hiring Platforms –  In this type of use case, both applicants and recruiters can track their conversations from within the app itself.
Ecommerce –  Whether engaging peers or customers in-app and app-to-app calling will make a  profitable difference.
Healthcare – In-app calls on telemedicine platforms allow patients  to be comforted by  doctors using in-browser calling APIs. 

How Do In-App Voice Calling Work?

Most in-app voice calling follow two key steps,

Step 1: A voice-calling API is integrated successfully, it is ready for in-app voice calling feature. A user has to click on the call button and the call is triggered by the SDK.

Step 2: When the call is received, both the users are then connected over VoIP and the communication remains within the application. 

How Does your Business Benefit by Using In-app Voice Features?

When using a top voice API and SDK in your application you should check if SDK is activated only during incoming and outgoing calls so as to preserve battery life. Bandwidth used is as low as 24 kbps uplink and downlink offers HD Audio quality and does not have jitters, almost no latency. 

In using these app-to-app calling features your business will benefit in the following ways:

Clear and Prompt Communication

Risks that are common to audio communication such as misunderstandings due to unclear communication are overridden.  A simple in-app call allows people to communicate clearly.

Cost-Effective and economical

Your business gains from all the savings achieved from using cheaper data plans for the voice calls. At the enterprise level this is a major saving for both the company and the clients. Since best voice chat apps do not use expensive infrastructure as in the case of phone calls, there are no maintenance costs.


The internal emotional state of a customer is expressed by ‘cues’ such as speed, volume, cadence and pitch so customer agents are able to gain empathic accuracy about the feelings of the customers. Voice calls allow simple interactive processes by using the in-app contact list and ensure convenience since internet-based calls  are delivered at high speed. Besides, all types of device varieties are compatible with in-app calling improving ease of use.

Audio Conferencing

In-app calling feature can be expanded to support audio conferencing solutions by using a media server to include 4 to 12 users. Such additional users can be added even without media servers. It is also an ideal setup for all types of business meetings, HR interviews or medical discussions involving more than two people.

Additional Call Features

A large number of add-on features can be included on standard phone functions to improve the overall calling experience. The chat program includes instant messaging, contact lists, and a feature to set up group calls or add another person during the call. Since these are flexible solutions, they can be customized to match the needs of every business.


The range of benefits include high quality phone services for smooth and clear communication  where there is no interference or latency nor call drops become vexing issues.

Call Recording Service

Best voice chat apps one can record and save calls, ensure messages are not lost and aid in auditing by recording content of meetings. Additional features include call logs that list the duration of calls and the time of calls.


Though using external calling features, in-app calling remains secure since every interaction is encrypted and  sessions remain on the app itself. The approach used when building these apps is to make them enterprise first entities.  Privacy during in-app calls is optimized by keeping the customer information private.

Why Should your Business Use Voice API?

Voice-calls are the most converting tool to persuade investors to buy financial/insurance products or for hiring platforms to induct new employees or ecommerce platforms to  guide their buyers. Using voice chat API and SDK will secure your conversations and keep the interaction within the app itself, apart from ensuring there are no additional costs incurred for placing the calls or making the calls.