AI Apps: The Best Free Mobile Applications in 2026

Artificial intelligence is no longer confined to desktops. In 2026, the best AI apps are available directly on your smartphone, for free. Whether you need a conversational assistant, an intelligent search tool, a virtual companion or homework help, there is a mobile AI app designed for every need.

The rise of optimised on-device models and polished iOS and Android applications has transformed the mobile AI experience. You can now chat with an AI, analyse photos, solve equations or get sourced answers, all from your pocket. This article reviews the seven best free AI applications available in 2026. For a broader overview of AI tools including desktop versions, see our parent guide on the best free AI.

Best mobile AI apps comparison table

The 7 best free AI apps for mobile

1. ChatGPT — The benchmark AI app

OpenAI's ChatGPT app remains the undisputed reference among mobile AI apps in 2026. Available on iOS and Android, it delivers a smooth experience with the GPT-4o model on the free tier, although daily usage is capped. The mobile interface is polished, fast and perfectly suited to touch interaction.

The advanced voice mode is one of the app's standout features: you can converse naturally with the AI as if on a phone call, with near-zero latency. Built-in image recognition lets you photograph a document, a dish or a maths problem and get an instant response. It is the most versatile AI application on the market, ideal for anyone who wants an all-purpose assistant always at hand. To learn how to make the most of the free version, see our free ChatGPT guide.

2. Claude — The AI app for writing and analysis

Anthropic's Claude app has established itself as one of the best free AI applications of 2026. Available on iPhone and Android, it offers the Sonnet model for free with a massive 200,000-token context window. This means you can upload an entire PDF document from your phone and receive a detailed analysis within seconds.

Where Claude excels on mobile is writing quality. Whether you are drafting a professional email, writing an article or summarising a report, the output is natural, nuanced and well structured. The mobile interface is clean and pleasant. Anthropic also enforces a strict policy against using data for training, a strong argument for professionals on the go. The limitations: no advanced voice mode and no built-in image generation. For more writing-focused AI tools, see our guide on AI writing tools.

3. Gemini — The AI app built into Google's ecosystem

Gemini is Google's AI application, pre-installed on recent Android phones and available on iOS. Its main advantage is native integration with Gmail, Google Maps, YouTube and Google Drive. You can ask Gemini to summarise your emails, plan a route or search for a video, all without leaving the app.

The Gemini 2.5 Flash model is free, fast and multimodal, handling text, images, video and audio equally well. On Android, Gemini can replace Google Assistant to become the phone's default voice assistant, creating a truly integrated experience. On iOS, the integration is less deep but the app remains capable. The weaknesses: writing quality lags behind Claude and hallucinations are more frequent. For image generation, Gemini is improving but remains behind the specialists — see our AI image generators guide.

4. Perplexity — The AI app for intelligent research

Perplexity is the must-have free AI app for research. Unlike conventional chatbots, Perplexity works as an AI search engine that systematically cites its sources. Every answer includes verifiable links, making it the most reliable tool for fact-checking or deep-diving into a topic from your phone.

The mobile app is particularly well designed with a clear, fast interface. The "Discover" feature offers a personalised news feed generated by AI. On the free plan, searches on the base model are unlimited, and a few Pro queries are offered daily. It is the ideal mobile AI app for students, journalists and curious minds who want accurate, sourced answers. The limitations: long-form content writing is not its forte, and a Pro subscription is needed for complex queries. Perplexity is also an excellent ChatGPT alternative for those who prioritise answer reliability.

5. Bing Copilot — Microsoft's AI app with free GPT-4o

The Bing Copilot app (formerly Bing Chat) from Microsoft is one of the most generous free AI applications on the market. It integrates GPT-4o for free with web search, DALL-E image generation and document analysis. On mobile, the experience is complete with no major restrictions.

The app stands out for its ability to generate images directly within the conversation, a practical feature that avoids juggling between multiple apps. Web search with Bing sources is natively integrated, making answers more factual than ChatGPT alone. The limitations: daily generations are capped, and the experience remains tied to the Microsoft ecosystem. For those who want an AI available immediately, Copilot is accessible without complex registration. Also check our full AI comparison to see how Copilot stacks up against its competitors.

6. Replika — The virtual companion AI app

Replika is a unique AI application: it is a virtual companion designed for conversation and emotional wellbeing. Unlike productivity-focused AI assistants, Replika offers an ongoing conversational relationship where the AI learns your personality, remembers your exchanges and adapts to your mood.

The app is available for free on iOS and Android. The free plan allows unlimited text conversations with your AI companion. Premium features include voice calls, augmented reality and interactive activities. Replika is not meant for productivity but addresses a genuine need for conversational companionship. It is popular with people who want to practise a language, manage stress or simply have someone to talk to. The limitations: advanced features require a subscription, and the AI remains limited for productive tasks.

7. Photomath — The AI app for mathematics

Photomath, now owned by Google, is the best free AI app for mathematics. Its concept is simple and brilliant: photograph a maths problem (handwritten or printed) and the app solves it step by step with detailed explanations.

The app covers arithmetic, algebra, trigonometry, calculus and statistics. Each solution is broken down into clear steps, making it a remarkable educational tool rather than a simple calculator. In 2026, generative AI integration also allows you to ask questions about mathematical concepts in natural language. The free plan covers most features. The limitations: restricted to mathematics with no help for other subjects. For developers looking for an AI for code rather than maths, see our guide on AI for coding.

How to choose the right mobile AI app

By use case

Choosing the right AI app depends above all on your primary need:

• Versatile general assistant: ChatGPT or Gemini are the top choices.
• Professional writing on mobile: Claude is superior.
• Factual sourced research: Perplexity is unbeatable.
• Maths homework help: Photomath is ideal.

By phone

All listed apps are available on both iOS and Android, but the experience can vary. On Android, Gemini has a clear edge because it can replace Google Assistant. On iPhone, ChatGPT's integration with Siri via Apple Shortcuts offers an interesting experience. Copilot is optimised for Microsoft ecosystem users regardless of operating system.

Combining multiple AI apps

The best strategy is to combine several free AI apps. Use ChatGPT or Claude for conversation and writing, Perplexity for research, Photomath for maths and Copilot for image generation. All these apps are free, so there is no reason to limit yourself to just one. To explore even more alternatives, see our ChatGPT alternatives guide or our page on Mistral AI, also available as a mobile app.