How to Develop a Voice Translator App?

Updated on Mar 22nd, 2024


Imagine you are on vacation at some distant place, and you have an app that converts your speech into the native language of that place in real time. Wouldn’t that be extraordinary? Well, that’s what a voice translator app does!  

Mobile app development has today become an inevitable reality. Companies of different sizes and domains are investing in voice translation solutions to streamline cross-boundary deals, deliver better travel and hospitality services, enhance users’ online shopping experience, enhance healthcare services, etc.   

In fact, a trusted source reveal that by 2024 there will be 8 billion voice translation apps supporting different languages!  

However, companies seeking to invest in voice translation app development have some most common concerns. To name a few, we have:  

  • How does a voice translation app work?  
  • How to develop a voice translator app?  
  • What are the features and technologies involved in voice translator app development?  
  • How much does it cost to develop a voice translator app? 
  • How do translator apps make money?  

Are you also seeking answers to similar questions? Don’t worry; we have got you covered!  

In today’s blog, we will explore everything you need to know about voice translator app development! We will offer you the top competitors, market scenario, features, technologies, and voice translation app development costs.  

  • Voice translator app is becoming a major trend in the app development market. The industry will exceed $3 billion by 2027!  
  • Investing in voice translation app development has many benefits, like better brand reach, easy and better revenues, instant growth and concept adoption, and uses across various industries.   
  • To create a voice translator app, you must work with various technologies and tools, including machine learning, neural networks, speech-to-text, text-to-speech tools, etc.   
  • Security, engaging UI, expert consulting, and flawless testing services are some factors that impact the success of your voice translation app.   
  • Always partner with a reputed app development company to get a user-focused, high-quality digital product matching your expectations.   

What Is Voice Translator App, and How Does it Work?

Before we proceed with voice translation app development, it is vital to know about it. So, what exactly is this real-time voice translator app?  

Well, a voice translation app is a unique mobile application that translates your voice commands into another language you select. That means you can convert anything you speak in English to an Asian language, for instance, Chinese, in real-time.   

But how does a voice translation app work?  

A voice translator app uses advanced machine learning algorithms to interpret the message and generate a corresponding translation in another language.   

Seems complicated? Here is a general overview of how a typical voice translation app might work:

  • Speech Recognition: The voice translator app captures the spoken words using the microphone. The audio is then analyzed and processed to convert the spoken words into text using Speech Recognition. That is typically done using Automatic Speech Recognition (ASR) which uses deep neural networks to analyze the sound waves and produce text.  
  • Natural Language Processing: Once the message is converted into text, the voice translator app uses Natural Language Processing (NLP) algorithms to interpret the meaning of the words and sentences in the source language.  
  • Translation: The app then uses machine translation technology to generate a corresponding translation in the target language. That is typically done using statistical machine translation, neural machine translation, or a combination of both, depending on the app.  
  • Speech Synthesis: Finally, the translated text is converted into spoken words using Text-to-Speech (TTS) technology. The app then plays the translated audio back to the user.  

Why are Companies Investing in Voice Translation App Development?

According to some trusted sources, the market of voice translation apps already surpassed $650 million in 2020. The market is further expected to reach $3 billion by 2027! Moreover, the Global Voice and Speech Technology market will generate a revenue of $22.9 billion by 2026.   

Well, looking at the profitable market of voice translator app development, we can clearly see that the growing demand for enterprise mobility solutions and cross-country trades facilitated the growth of voice translator apps.   

Additionally, a few more reasons also justify the exponential growth of voice translator apps in 2023. To name a few, we have:  

Better Global CommunicationBetter Global Communication 

As businesses expand their reach globally, there is a growing need for communication across different languages. Voice translation apps provide an easy and efficient way to communicate across language barriers.  

Better ReachBetter Reach

Voice translator apps can help businesses reach new customers who speak different languages, opening up new markets and revenue streams.  

Improved Customer ExperienceImproved Customer Experience

By allowing customers to communicate in their language, businesses can improve the customer experience and build stronger relationships with their customers.   

Supporting Remote WorkSupporting Remote Work

With more people working remotely than ever before, voice translation apps can facilitate communication between remote workers across different regions and time zones.  

Enabling International Travel and TradesEnabling International Travel and Trades

Voice translation apps are also useful for travelers, allowing them to communicate with locals in their destination country and enhancing the overall travel experience. Companies looking to expand overseas can also utilize voice translation apps for better communication and effective collaboration.   

Overall, investing in voice translation app development can significantly benefit your business, including improved communication, increased revenue, and a more seamless and convenient customer experience.  

Top Voice Translator Apps of 2023

Now that you have decided to launch a voice translator app, it is time to study your competitors to prepare a high-performing strategy. As a leading app development company, we have listed the top five voice translator apps of 2023. You can explore the features and tech stack they use to lure users and win the competition.   

Google Translate

Google Translate is a free voice translator app that supports over 100 languages. It offers real-time translation, voice input, and output, as well as text translation and image translation. 


  • Translation of text, speech, and images in over 100 languages. 
  • Real-time translation using the camera for live translations. 
  • Conversation mode for real-time translation during a conversation. 
  • Language detection and auto-detection of input language. 
  • Phrasebook with frequently used expressions for travel. 
  • Text-to-speech and speech-to-text functionality. 


 TripLingo is a voice translator app designed for travelers. It supports over 100 languages and offers real-time translation, voice input, and output, as well as a phrasebook, culture guide, and language lessons.  


  • Language learning courses and lessons 
  • Interactive and gamified exercises 
  • Vocabulary and grammar quizzes 
  • Speech recognition and pronunciation practice 
  • Personalized learning plans and progress tracking 
  • Social features such as chat groups or language exchange partners 
  • Integration with external resources such as dictionaries or language learning blogs 

Microsoft Translate

Microsoft Translator is a free voice translator app that supports over 60 languages. It offers real-time translation, text and voice input, and output, as well as a phrasebook and conversation mode. 


  • Multi-device conversation 
  • Split-screen translation 
  • Single microphone to translate short and long phrases online 
  • Share translation over chats, pin your favorite phrases, and offline translation support 
  • Image translation and phrasebooks  


SayHi Translate is a voice translator app that supports over 90 languages. It offers real-time translation, voice input, and output, as well as text translation and a phrasebook. 


  • Hold the microphone to bring up the keyword and convert the text. 
  • The users can change the language, use male or female voices, and can slow or fasten the speed of the audio. 
  • The conversations can be copied and shared via email, or on social media.  
  • Push notifications to offer real-time updates to the user. 
  • In-app chat functionality. 


iTranslate is a popular voice translator app that supports over 100 languages. It offers text and voice translation, as well as a dictionary, pronunciation guides, and conversation mode. 


  • Text translator in over 100 languages. 
  • Text to speech translation in male and female voices. 
  • The users can easily switch between various dialects as they speak. 
  • Social sharing, favorites, and search history. 

What Features Should You Incorporate in Your Voice Translator App?

Voice Translator App Development -Top Features

Features play a crucial role in today’s competitive market. We all know there are countless options for people in a singular arena, and the voice translation app market is no exception. Besides the competitors mentioned above, many others can give you tough competition.   

Hence, when designing a voice translator app, you need to consider the users’ needs and the features that will make the app easy to use and effective in translating languages. As a leading app development company, here we have listed some features that you should consider incorporating into your voice translator app:  

Multiple Languages

The app should support multiple languages, including popular languages such as English, Spanish, French, Chinese, and Arabic. However, you can also use text-to-speech or speech-to-text options and add several other languages to your voice translator app.   

Voice Recognition

Today’s era is about AI development services, and voice translation app is no exception. Your real-time voice translator app should have a robust voice recognition system to accurately recognize and translate the user’s spoken words. You can even use NLP services to further enhance the conversational capabilities of your voice recognition tool.   

Also Read- How to Develop a Voice Recognition App?


The app should be able to convert translated text into speech, making it easy for users to hear the translation. You must also incorporate the reverse of that, i.e., a speech-to-text conversion that can help users appropriately convey their message.   

Offline Capability

The app should have the ability to work offline, which is especially useful for users traveling abroad who may not have access to Wi-Fi or cellular data. That means your app could seamlessly assist users and help you promote your brand even during the most difficult times of zero internet connectivity.   

Pronunciation Assistance

The app should provide pronunciation assistance to users, helping them learn how to pronounce words in the target language correctly.  


The app should include a phrasebook that contains commonly used phrases and sentences, making it easier for users to communicate in the target language. The saved words or phrases must also be highlighted in this feature.   

Customizable Settings

The app should have customizable settings that allow users to adjust the font size, language preferences, and other settings to suit their needs. Besides, you should also allow your users to change their usernames, contact details, and email address in the app.   

Integration with Other Apps

The app should be able to integrate with other apps, such as messaging apps or social media platforms, to make it easier for users to communicate in different languages. You can offer online payments, social sign-in, or even in-app communication functionalities with third-party integrations.   


Technologies to Consider for Developing a Voice Translator App  


You must work with several technologies and tools to implement such robust features in your voice translator app. Having in-depth expertise at various levels of app development is also essential for voice translator app development.   

Not just that, but you must also have adequate knowledge of next-gen AI development and cloud integration services that can help you build a real-time voice translation app.     

Hence, whether you want to begin from scratch or integrate a component in your voice translation app, here are the top technologies and tools you need to work with for successful app development.  

Automatic Speech Recognition (ASR) 

ASR technology allows computers to recognize and transcribe human speech. This technology is essential for developing a voice translator app because it allows it to understand what the user says.  

Natural Language Processing (NLP)

NLP is a branch of AI that deals with the interactions between computers and human languages. With NLP, the app can analyze and understand the meaning of the spoken language, which is critical for accurate translation.  

Machine Translation (MT)

MT uses computers to translate text or speech from one language to another. MT is an essential technology for a voice translator app because it translates the user’s speech into the target language.  

Text-to-Speech (TTS)

TTS technology allows computers to synthesize human-like speech from text. With TTS, the app can convert the translated text into spoken words, which is necessary for the user to hear the translation.  

Voice Recognition and Synthesis

This technology is important for the app to recognize the user’s voice and synthesize speech in a natural and human-like way.   

Cloud-Based Services

Cloud-based services can provide access to pre-built language models, which can significantly speed up the development process and improve the accuracy of the app’s translation capabilities.  

Overall, a combination of these technologies can be used to develop a robust and accurate voice translator app that can help people communicate across language barriers.   

How to Proceed with Voice Translation App Development – A Step-by-Step Approach

So, we are at the most awaited section of our article, the process of developing a voice translation app. As we discussed above, there are many things associated with voice translator app development, including features, technologies, architecture, etc., that one has to address.  

Not to mention, the task of hiring an elite app development team that has decade-long expertise in creating such apps can also be a daunting task for some companies. But here’s how you can make it a piece of cake by following some general steps:   

Step 1: Requirements Analysis & Market Research

The first step to begin with your voice translator app development is to understand your requirements and determine the scope of your app and the languages you want to support. You will need to decide whether you want the translation done in real-time or if it will be a two-step process where the user records their speech, and then the app translates it.  

Additionally, the main aim of developing the voice translator app must also be determined. For that, you can ask yourself questions like:  

  • Who is my target audience?  
  • How can they benefit from my voice translator app?  
  • What are other apps prevalent in the market?  
  • What are the top features of those apps liked by my target audience?
  • What technology and resources will I need to develop an app?
  • How can I market and monetize my voice translator app?  

Apart from everything mentioned above, you must also heed the latest app development trends. Leveraging the latest trends and effective marketing strategies could help you succeed and create a future-proof product for years to come.   

Alternatively, you can connect with a reputed digital transformation consulting company that can help you evaluate your idea and create a perfect roadmap for voice translator app development.  

Step 2: Hiring an Elite App Development Company  

The next big step to creating a real-time voice translator app is hiring an elite app development company. Well, that one’s obvious! Since you have analyzed your ideas, you will require a team of app developers and consultants who can transform those ideas into a reality. But what’s the case with an elite app development team?  

Creating an app, irrespective of the domain and size requires expertise. Your chosen app development team must be capable enough to know and handle all sorts of hurdles that might come during voice translator app development. Whether it be technology, next-gen models, selecting the right resources, or even offering a comprehensive range of services under one roof, an elite app development company does it all!  

Additionally, you can also get flexible engagement models, assistance in market research and competitor analysis, and needs-based scaling services by hiring a professional app development company. Well, at least that’s what we offer at Matellio for your mobile app development projects!  

Hence, we strongly suggest choosing a reliable partner that offers all those and other services required for the success of your voice translator app.  

Step 3: Technologies, Branding, and UI/UX 

Designing, branding, prototyping, MVP development, proof-of-concept, and more. Those are just a few terms that may seem foreign to you but, in reality, are the most important aspects of a successful voice translator app development!  

Your app needs a user interface that allows users to record their voice or input text, select the language they want to translate to and display or play the translated audio. Every button, text, and theme of your app should resonate with your brand value and future business goals. That’s where branding and UI/UX come into play!  

A professional app development company helps you explore the top trends in user interface and design that can elevate your app’s success rates. Moreover, they even have professional UI/UX experts that not only frame an incredible user journey but also assist throughout the designing and branding process, including architecture designing, UI/UX consulting, proof-of-concept, MVP and wireframe designing, etc.   

Besides that, you must also pay heed to the technologies used in your voice translator app development. We have already mentioned the core and next-gen tech models for creating a real-time voice translation app.   

However, you can connect with our experts to learn more about the innovative technologies that enhance your custom mobile application.   

Fill out our form to book a free expert consultation right away!  

Step 4: Voice Translation App Development

The next and most crucial step in developing a voice translation app is development. Once you hire your development partner, create designs, and verify your concepts, you can begin your voice translation app development.   

However, ensure your chosen app development partner follows the Agile development methodology before proceeding. That’s because the Agile method allows you to monitor your project constantly and eliminate surprises and rework situations.   

You can even scale your development team per the project requirements if you get a real-time project status, which the Agile methodology offers. Hence, always ask whether your app development partner offers the Agile method for creating a voice translator app.   

Step 5: Testing and Deployment

The final step in voice translator app development is to test and deploy your application. You must test your app under different conditions to ensure it is bug-free and works across devices and platforms.   

However, despite such importance, many companies often skip that step and eventually face app performance issues. That also leads to damaging their brand reputation. We are sure you do not want that for your voice translator app!  

Hence, you can choose between manual and automated testing (the first being human-dependent and the latter being human-independent) per your project requirements. Always remember to test your product before deploying it over the platform. Also, ensure that your app development partner offers post-launch support and maintenance services.   

In short, developing a voice translation app is a complex process that requires knowledge in several fields, such as machine learning, natural language processing, and app development. Consider consulting with experts in these fields if you do not have the necessary expertise.  

voice translation app development

Other Factors Impacting the Success of Your Voice Translator App  

So, you have finally begun your voice translation app development and may be seeking ways to get your product faster to the market. However, many other critical aspects can affect the success of your voice translator app, like the ones mentioned above.   

Hence, you must address them while developing your voice translator app and launching it in the market.   

Monetization-ModelMonetization Model

Every app needs a solid monetization model to generate revenues during the initial period. Whether you generate revenues from third-party advertising, freemium models, or in-app purchases, there should be a perfect plan to monetize your app; else, there would be no good reason to launch your app.   

Hence, you must explore the top monetization techniques for your voice translator app. An expert app development company can also help you choose the most suitable monetization model that fits your needs and helps you cater to your financial requirements.   


Another important factor to consider while voice translation app development is security. With the rise in digital transformation services, cybersecurity concerns have only increased. Hence, it becomes crucial to secure the data of your custom mobile app via data encryption, cloud consultation, and multi-layer authentication.    

So, connect with a reliable business integration and cybersecurity consulting services company to help you frame a solid security roadmap that protects your data and app from thefts, fraud, and online phishing.

Expert-ConsultingExpert Consulting

Last but not least, expert consulting plays an important role in determining the success of your voice translator app. With expert consultation, you can easily explore your concept’s feasibility and the latest market trends and identify your competitors.   

Things like features, technologies, resources required, and even the development approach can be determined via digital consulting services. Hence, always choose the company that assists in all those aspects mentioned above and helps you navigate the app development process.   

That’s Where Matellio Comes In!  

As a leading app development company having expertise in next-gen technologies, we can turn your ideas into a successful reality. Our decade-long experience working with multiple industries and knowledge of various tools and technologies makes us the top choice for businesses in mobile app development.   

Whether you need to create an app from scratch, check the feasibility of your concept, or enhance an existing digital product, we can assist you with all your business needs. We also offer a free 30-minute consultation, competitor research, market analysis, and a no-obligation quote for your project. You only need to fill out our form to get started!  

So, do not miss that golden opportunity. Reach us and transform your idea into a profit-generating machine.   

Lets Begin


In conclusion, developing a voice translator app requires a combination of advanced technologies, including Automatic Speech Recognition, Natural Language Processing, Machine Translation, Text-to-Speech, Voice Recognition and Synthesis, and Cloud-Based Services. These technologies enable the app to accurately recognize and translate speech from one language to another while synthesizing the translated text into spoken words.  

When developing a voice translator app, it’s important to keep in mind the target audience’s needs and the specific languages and dialects the app will need to support. It’s also important to thoroughly test the app’s accuracy and functionality to ensure it meets the highest performance standards.  

With the right combination of technologies, careful planning, and rigorous testing, it is possible to develop a highly effective voice translator app to help people communicate across language barriers, opening up new opportunities for cross-cultural collaboration, travel, and exploration.  

Hence, you must always partner with a talented app development company that, via a wide range of services and proper consultancy, can convert your ideas into a successful reality!

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