How to Build an AI Girlfriend App with OpenAI and Voice Tech

Last Updated: May 29, 2025 by Michael Kahn. Published: May 29, 2025.

A growing a growing number of people are interested in developing AI girlfriend apps. Some of them are trying to take advantage of the growing market for these services, while others are simply people that want to use the app themselves.

It makes sense that so many people want to develop these types of apps. One survey found that 28% of men under the age of 35 have had an AI girlfriend before. Around three out of five men that use AI girlfriend services do so every day.

The great news is that it is not hard to develop these types of apps if you have access to OpenAI and other relevant technology. Here are some steps that you will need to follow if you want to create your own AI girlfriend app.

Identify the Target Audience for the App

Some AI girlfriend services try to appeal to every prospective user. However, this might not be the best option for newcomers to the market. The industry is starting to become fairly saturated, which means that people are going to need to start focusing on specific niches if they want to be successful developing apps for people interested in creating girlfriends using AI. 

You will want to decide what market you will want to focus on. Some of the possible market segments include the following:

• You might want to focus on people that enjoy anime. A surprisingly high number of people report that they enjoy anime and would like to have an anime woman for an AI girlfriend.
• You might want to focus on serving people in certain countries that don’t have a lot of AI girlfriend services. This may include people in non-English speaking countries that might appreciate those services.
• You might want to design your AI girlfriend service to serve people in rural areas. This might include training it on datasets of content that uses the vocabulary and the tone of people that live there. This will make these services seem more reliable to people living in remote areas than a lot of other AI girlfriend services that tend to be tailored towards people living in more urban areas. 

You will have a much easier time standing out in this market if you identify a niche market. This is similar to how a lot of dating apps specialize in serving Christians, farmers and other niche demographics. 

Choose the AI Model that Will Be Responsible for Handling the Conversations

You will want to choose the right AI interface that will be responsible for handling conversations between humans and AI. This is known as the Natural Language Processing model or the NLP. You will want to use the fourth version of OpenAI to handle this. This is the most sophisticated NLP available, which can make sure that the AI girlfriend app can understand and interact with human users. 

Find the Best Voice Interface to Communicate with the Users

There are a lot of great voice interfaces that you can choose from to have verbal conversations between the human users and the AI. You will want to test different ones to see which sound the most realistic. 

Create Several Different Personas that Your Users Can Choose from

You need to keep in mind that every user is going to be looking for something different when they want to have an AI girlfriend. Some will want a nerdy, introverted girlfriend that shares their interest in Pathfinder, video games and other unconventional hobbies. Others will be looking for a party girl that would have a great sense of humor and enjoy chatting with their friends at a bar. 

You will want to create a few different personalities for your AI girlfriend, so your users will be able to choose the ones that are best for them. This will give people a better starting point when they use the service. 

Develop a Model to Convert Voice Chats

You are also going to need to develop a model that will be able to understand the user’s voice and process what they are saying. This is going to help them have fluid conversations with their AI girlfriend when they are having video chats with it. The best way to do this is to have an engine that automatically sends the user’s speech to OpenAI to understand what they are saying. OpenAI can then develop a response and speak it back to the user through the voice of the AI girlfriend. 

Develop a Storage Space for Important Details About the User and their Relationship

You will also want to set aside some storage space that will be able to retain key details about the user, such as their age and feedback that they have given to the AI girlfriend. This will help the app learn more about them and give more nuanced feedback in the future.