Glossary
AI girlfriend and AI companion glossary
Short, plain-English definitions of the terms you will meet when you look into AI girlfriends and AI companions.
- AI companion
- An AI companion is a conversational AI designed for ongoing friendship, support or romance rather than for answering one-off questions. An AI girlfriend is one type of AI companion. Learn more
- AI girlfriend
- An AI girlfriend is a virtual companion powered by artificial intelligence that you chat with like a partner or close friend, usually through a mobile app. Many also offer voice calls, selfies, roleplay and customization. Learn more
- AI hallucination
- An AI hallucination is a confident-sounding reply that is wrong or invented. It is why you should not treat an AI companion as a reliable source of facts or advice.
- AI selfie
- An AI selfie is an image generated by AI to look like a photo your companion took, matching the appearance you designed for her. Learn more
- Context window
- The context window is the amount of text a language model can consider at once. When a chat grows longer than the window, earlier messages fall out of view unless the app adds a memory system. Learn more
- Data safety section
- The Data safety section is a part of every Google Play listing where developers declare what data an app collects, shares and protects. It is self-declared, so read it alongside the Privacy Policy. Learn more
- In-app purchase
- An in-app purchase is an optional payment inside an app for extras such as credits, features or subscriptions. Many AI girlfriend apps are free to download but offer them. Learn more
- Large language model (LLM)
- A large language model is an AI trained on huge amounts of text that can read a message and write a natural reply. It is the engine behind most AI companion conversations. Learn more
- Long-term memory
- Long-term memory is how an AI companion saves facts and events from past conversations, such as your job or pet, and uses them in later chats so the relationship feels continuous. Learn more
- On-device storage
- On-device storage means data such as chat history is kept on your phone rather than on the developer's servers. Replies may still be generated by AI services over the internet. Learn more
- Persona
- A persona is the personality, tone, backstory and interests given to an AI character. It guides how she speaks and reacts, and in many apps you can customize it. Learn more
- Roleplay
- Roleplay in an AI companion app means acting out a scene or story together, such as a date or an adventure, with the AI playing a character. Learn more
- Speech recognition
- Speech recognition converts your spoken words into text so an AI can respond. It is the first step in an AI voice call. Learn more
- Text-to-speech (TTS)
- Text-to-speech turns written text into spoken audio. Modern TTS voices add tone and emotion, which is what makes an AI voice call sound natural. Learn more
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