AI is baked into how we work, communicate, and even unwind. Whether you’re editing a selfie, summarizing a meeting, or getting help writing your next blog post, there’s likely an AI app built to do it faster (and smarter) than you could on your own.

And the market is booming. According to PWC, AI could contribute up to $15.7 trillion to the global economy by 2030! With AI now powering everything from mobile apps to enterprise platforms, it’s no surprise that Apple’s App Store and Google Play are flooded with new tools promising to save time and boost productivity.

So how do you know which ones are actually worth downloading? In this guide, we’ll break down what AI apps are, why they matter, and which ones are leading the way in 2025. 

AIアプリケーションとは何ですか？

AI applications are platforms that use AI technology, machine learning (ML), and natural language processing (NLP) to perform tasks that usually require a human, such as editing photos. 

最も良い例はOpenAIのChatGPTです（後でお話しします）。これは、プロンプトや質問に応じて返答し、自身の間違いを認識する便利なツールです。 インターネット上のさまざまなソースからの大規模なデータセットを分析し、最も関連性の高い回答をまとめます。 

または、SiriやAlexaのようなバーチャルアシスタントを考えてみてください。 両方とも音声コマンドを理解し、ユーザーに情報を提供します。 

これらのAIアプリは、デスクトップとモバイルの両方で、iOSまたはAndroid用に見つけることができます。 それでは、次のセクションでトップのAIアプリを見ていきましょう。 

What are the Top AI apps?

The global AI software market will continue to grow rapidly in the coming years, with 58% of businesses expected to increase their AI investments this year, according to Hostinger. 

However, as the technology advances, more and more useful (and not so useful) apps will crop up, making it harder for you to choose one.

To make it easy, we’ve put together a list of the very best AI apps:

1. Guru — Best knowledge management and enterprise AI search tool.
   
   
2. ChatGPT — Best AI chatbot for answering questions.
   
   
3. Microsoft Copilot (formerly Bing Chat) — Best Microsoft assistant for Microsoft Edge.
   
   
4. FaceApp — Best AI app for editing photos and selfies.
   
   
5. Lensa — Best AI tool for generating artistic edits.
   
   
6. Google Assistant — Best virtual assistant for everyday tasks.
   
   
7. StarryAI — Best free AI image generator based on text prompts.
   
   
8. Socratic — Best free learning app for students.
   
   
9. Cleo — Best chatbot for budgeting assistance.
   
   
10. Read AI — Best AI tool for generated summaries and transcripts.
    
    
11. Gemini — Best experimental AI assistant by Google.
    
    
12. Deepseek — Best AI tool for developers and researchers.
    
    
13. Otter — Best AI meeting assistant for real-time transcription.
    
    
14. Seeing AI — Best AI app for visual assistance.
    
    
15. Synthesia — Best AI tool for creating videos from text.
    
    
16. Perplexity — Best AI search engine for trusted information.
    
    
17. Claude — Best AI chatbot for thoughtful, safe conversations.
    
    
18. Midjourney — Best AI image generator for artistic visuals.
    
    
19. Grammarly — Best AI writing assistant for clarity and tone.
    
    
20. Runway — Best AI-powered video editor for creators.
    
    
21. Fathom — Best AI meeting tool for instant summaries.
    
    
22. Filmora — Best AI video editor for social media content.

Ready to learn more about these apps? Head to the next section!

The 22 Best AI Apps of 2025

1. Guru

Guru is an AI-powered knowledge platform that acts as your company’s single source of truth, combining enterprise search, a wiki, and an intranet in one.

With Guru, you don’t have to toggle between tools to find answers. Its AI pulls info from across your connected apps and delivers verified, context-aware responses directly in your workflow. 

It’s trusted by teams who want instant, reliable access to internal knowledge without the chaos of outdated docs or scattered data.

主な機能

• AI enterprise search: Search across apps like Google Docs, Dropbox, Slack, Salesforce, and more.
  
  
• Knowledge Agents: Customizable AI agents deliver team-specific results (e.g., HR gets HR docs; Sales sees product updates).
  
  
• AI writing assistant: Helps you draft, edit, translate, and improve tone.
  
  
• Smart verification: Keeps info accurate with built-in review and expiration workflows.
  
  
• Workflow integrations: Use Guru inside Chrome, Slack, MS Teams, Zendesk, and more.
  
  

Use cases
Guru is perfect for fast-growing teams in sales, support, HR, IT, operations, and more who need instant access to verified information and want to reduce time spent searching or second-guessing what’s true.

2. ChatGPT

ChatGPTはOpenAIのインテリジェントチャットボットで、自然言語モデルを使用して、まるで友人と話しているかのようにユーザーと対話します。

ChatGPTには音声認識機能もあり、さまざまな言語やアクセントを理解することができます。 

通常、テキストプロンプトを介して動作しますが、最新のGPT-4 AIモデルでは、アイデアを画像で伝えることができます。 ChatGPT even has voice recognition, able to understand various languages and accents.

主な機能

• Image generation: With DALL-E, you can create any image you have in mind for your blog articles or social media posts.
  
  
• Summarize features: If you have long documents that need to be trimmed or want to simplify complex topics, ask ChatGPT to summarize them in a few paragraphs.
  
  
• Mobile app: You can access ChatGPT on your phone and get instant answers on the fly.
  
  

Use cases
ChatGPT is great for personal use, but also for any business in any industry.

3. Microsoft Copilot (formerly Bing Chat)

Microsoft Copilot is your AI sidekick for the Microsoft ecosystem. It works with Edge, Word, Excel, and Teams to help with everything from research to document creation.

You can ask it complex questions, get detailed summaries, and even create images on demand. Its creative writing features make it feel like a content assistant that’s always on call.

回答を要約したり、情報源へのリンクを取得したりすることさえ可能です。

• Conversation styles: Choose between creative, balanced, and precise response modes.
  
  
• AI image creator: Generate visuals by describing them in natural language.
  
  
• Office integrations: Draft emails, summarize meetings, and build presentations across Microsoft tools.
  
  

Use cases
Copilot is ideal for business professionals who spend most of their time inside the Microsoft ecosystem.

4. FaceApp

FaceApp is a selfie editor that uses AI to give your photos a digital makeover—whether you’re aging your face, changing hairstyles, or swapping genders.

With just a tap, you can apply realistic filters that save time compared to traditional photo editing software.

Lensa

• Impression filters: Add makeup, glasses, or facial hair to your selfies.
  
  
• Retouch tools: Smooth skin, remove blemishes, or whiten teeth instantly.
  
  
• Face morphing: Try out different looks, from old age to celebrity mashups.
  
  

Use cases
FaceApp is perfect for personal use, content creators, and anyone who loves playing with visual transformations.

5. Lensa

Lensa is an AI-powered photo editor known for its filters, effects, and AI avatar generator.

With its one-tap editing features, Lensa lets you enhance portraits, remove unwanted objects, and experiment with artistic styles.

主な機能

• Erase tool: Remove distractions or photobombers with a single tap.
  
  
• AI avatars: Turn selfies into stylized avatars using different themes.
  
  
• Retouching: Brighten eyes, smooth skin, and perfect lighting.
  
  

Use cases
Lensa is great for social media users, photographers, and anyone wanting quick, polished edits.

6. Googleアシスタント

Google Assistant is a voice-controlled virtual helper that answers questions, automates tasks, and integrates with your smart home devices.

From setting reminders to turning off your lights, Google Assistant is always a “Hey Google” away.

主な機能

• Smart home control: Manage lights, thermostats, and other connected devices.
  
  
• Gemini AI mode: Test out new capabilities in Google’s experimental AI version.
  
  
• Hands-free commands: Navigate your phone or ask questions using only your voice.
  
  

Use cases
Google Assistant is ideal for anyone looking to streamline daily tasks, automate routines, or control smart devices.

7. StarryAI

StarryAI is a text-to-image app that uses generative AI to create stunning artwork from simple prompts.

You can generate futuristic scenes, portraits, and abstract concepts just by typing what you imagine.

その結果、新しい概念をより早く学ぶことができます。ただし、Socraticには視覚的な説明もあり、より簡単にポイントを理解させてくれます。

• Custom image styles: Choose from realism, anime, surrealism, and more.
  
  
• Portrait generator: Design detailed characters or avatars with personality.
  
  
• Image enhancement: Refine outputs with high-resolution quality.
  
  

Use cases
StarryAI is great for digital artists, designers, and anyone exploring creative expression through AI.

8. 使用例

Socratic is an AI-powered education app by Google that helps students understand concepts in math, science, history, and more.

You can snap a photo of a problem or ask a question, and Socratic will pull up step-by-step solutions and explainer videos.

主な機能

• Visual explanations: Learn with diagrams, videos, and interactive content.
  
  
• Homework help: Use text, voice, or photos to ask questions.
  
  
• Powered by Google AI: Delivers reliable answers from vetted sources.
  
  

Use cases
Socratic is perfect for high school and college students looking to supplement their learning outside the classroom.

9. Cleo

Cleo is an AI financial assistant designed to help you manage your money, track spending, and hit your savings goals—all with a side of sass.

You can chat with Cleo in plain language, and it will provide budgeting tips, transaction insights, and even small cash advances.

主な機能

• Spending breakdowns: See where your money’s going by category or merchant.
  
  
• Proactive insights: Get financial advice, alerts, and weekly reports.
  
  
• Cleo chat: Ask money-related questions and get instant responses.
  
  

Use cases
Cleo is great for young professionals who want to improve their finances without the jargon or complexity of traditional tools.

10. AIアプリには多くの利点があります。最も大きな利点の一つは、AIアルゴリズムを通じて顧客体験が向上することです。

Read AI is your meeting sidekick—automatically recording, transcribing, and summarizing meetings across Zoom, Teams, and Meet.

With its smart playback features, Read AI makes it easy to review key moments and get insights fast.

これにより、アプリがすべての人にとってよりアクセス可能になります。 

• Video summaries: Turn an hour-long meeting into a 2-minute highlight reel.
  
  
• Smart scheduler: Find the best meeting time based on your calendar.
  
  
• Speaker coach: Get tips on how to improve your delivery and clarity.
  
  

Use cases
Read AI is ideal for remote teams, managers, and anyone looking to make meetings more productive.

11. Gemini

Gemini is Google’s new AI assistant that merges the capabilities of Bard and Google Assistant, helping you write, plan, search, and solve problems using both text and voice.

Top features

• Contextual help: Understands your screen and workflow.
  
  
• Multimodal support: Handles text, voice, and images.
  
  
• Workspace integration: Works across Gmail, Docs, and more.
  
  

Use cases
Gemini is great for productivity across Google’s ecosystem.

12. Deepseek

Deepseek is an open-source LLM optimized for code generation and technical tasks, helping you debug, explain, and write high-quality code in multiple languages.

主な機能

• Multi-language support: Works with Python, JavaScript, and more.
  
  
• Code explanations: Understand what each block of code does.
  
  
• Open source: Community-driven development and customization.
  
  

Use cases
Deepseek is perfect for developers, data scientists, and engineering teams.

13. Otter

Otter records and transcribes meetings on the spot, then auto-generates summaries and highlights to keep you focused and organized after every call.

トップ機能

• Real-time transcription: Capture what’s being said as it happens.
  
  
• Automatic summaries: Key points delivered right after the meeting.
  
  
• Integrations: Works with Zoom, Meet, and Teams.
  
  

Use cases
Otter is great for busy professionals, students, and journalists.

14. Seeing AI

Designed for people with low vision, Seeing AI narrates the world around you by identifying text, currency, faces, and scenes using your phone’s camera.

Top features

• Scene recognition: Understand your surroundings visually.
  
  
• Text reader: Reads documents, signs, and labels out loud.
  
  
• Facial recognition: Helps identify familiar faces.
  
  

Use cases
Seeing AI is ideal for visually impaired users who want more independence.

15. Synthesia

Synthesia turns your written scripts into professional videos with photorealistic avatars, making it ideal for training, product demos, or internal comms.

Top features

• AI avatars: Choose from diverse presenters.
  
  
• Script to video: Just type—no camera needed.
  
  
• Language support: Create videos in over 120 languages.
  
  

Use cases
Synthesia is great for L&D teams, marketers, and global companies.

16. Perplexity

Perplexity is an AI-powered research assistant that gives direct, cited answers from real sources—perfect for quick fact-checking or deep dives into complex topics.

Top features

• Source links: Know exactly where your answers come from.
  
  
• Follow-up mode: Ask related questions without losing context.
  
  
• Real-time info: Stay up to date with current data.
  
  

Use cases
Perplexity is ideal for writers, researchers, and knowledge workers.

17. Claude

Claude, created by Anthropic, is a friendly chatbot that excels at nuanced, context-aware responses, making it ideal for writing help, brainstorming, and Q&A.

主な機能

• Long memory: Handles extended conversations and documents.
  
  
• Safety-focused: Built with guardrails for safer interactions.
  
  
• Natural tone: Feels like talking to a thoughtful collaborator.
  
  

Use cases
Claude is great for professionals and teams that value thoughtful, secure AI.

18. Midjourney

Midjourney transforms your text prompts into surreal, high-quality images, making it a go-to tool for artists, marketers, and creatives of all kinds.

主な機能

• Unique styles: Great for surrealism and concept art.
  
  
• Fast rendering: Generate results quickly.
  
  
• Community support: Get inspiration from public galleries.
  
  

Use cases
Midjourney is perfect for creative teams, storytellers, and designers.

19. Grammarly

Grammarly uses advanced AI to check grammar, improve tone, and clarify writing in real time across your emails, documents, and messages.

トップ機能

• Tone detection: Adjust your message depending on audience.
  
  
• Writing suggestions: Catch grammar and clarity issues.
  
  
• Browser and app support: Works across all major platforms.
  
  

Use cases
Grammarly is great for professionals, students, and content creators.

20. Runway

Runway helps you create and edit videos using AI features like object removal, motion tracking, and auto-generative effects—no editing background required.

Top features

• Background removal: Erase objects and people with one click.
  
  
• Text-to-video: Generate short clips from simple prompts.
  
  
• Collaboration tools: Work with teams in real time.
  
  

Use cases
Runway is ideal for content creators, marketers, and small teams.

21. Fathom

Fathom automatically records and summarizes your Zoom calls, then syncs the insights to your CRM or note-taking app so nothing gets lost in the shuffle.

トップ機能

• Summary highlights: Get key takeaways and action items.
  
  
• CRM sync: Push notes directly into Salesforce and more.
  
  
• Time-stamped clips: Share exact moments with your team.
  
  

Use cases
Fathom is perfect for sales teams, customer success, and account managers.

22. Filmora

Filmora is a user-friendly video editor packed with AI tools like auto-cut, motion tracking, and text-to-video, making it perfect for YouTubers and content creators.

Top features

• AI Smart Cutout: Automatically remove backgrounds.
  
  
• Auto beat sync: Match visuals to music tracks.
  
  
• Text-to-video: Turn scripts into stylized video content.
  
  

Use cases
Filmora is great for beginner video editors and influencers on platforms like TikTok and YouTube.

Best AI Apps for iPhone

If you're an iPhone user, there’s no shortage of powerful AI apps to help you work smarter, stay organized, or have a little fun. Many of these apps are fully optimized for iOS and integrate seamlessly with your Apple ecosystem.

What are the best AI apps for iPhone?

Some of the top AI apps for iPhone include ChatGPT, Grammarly, Google Assistant, and Otter. 

These tools are designed to work well within iOS—whether that means supporting Siri Shortcuts, syncing with iCloud, or offering smooth performance across iPhones and iPads.

Apps like Lensa and FaceApp are particularly popular for editing photos on the go, while Read AI and Fathom are favorites among remote workers looking to summarize meetings and calls. 

If you want deeper integration with your Apple devices, Seeing AI by Microsoft is another must-try, especially for accessibility support.

Best AI Apps for Android

Android users benefit from a diverse app marketplace with more customization and open-source options. Many AI tools are built for flexibility and work beautifully across Android phones and tablets.

What are the best AI apps for Android?

Top AI app picks for Android include Microsoft Copilot, Perplexity, Socratic, and Gemini, Google’s experimental AI assistant. These apps take advantage of Android’s flexibility to offer robust voice controls, background syncing, and integration with Google Workspace tools.

If you’re into creative tools, Midjourney (via Discord), Runway, and Filmora provide image and video editing experiences that really shine on larger-screen Android devices. 

For productivity and writing, Grammarly and Deepseek offer useful mobile workflows. And if budgeting is your thing, Cleo is a highly-rated AI-powered financial app available for Android too.

Best Free AI Apps

You don’t have to spend a dime to get serious value from AI. Many of the best tools on the market offer free versions with powerful features—and plenty of flexibility.

What are the best free AI apps?

Some standout free AI apps include ChatGPT, Google Assistant, Cleo, Socratic, StarryAI, and Otter. These tools give you real functionality without forcing you to pay up front. For example, Socratic helps students solve math problems by simply taking a photo, and Otter offers free meeting transcriptions and summaries.

ChatGPT’s free tier lets you chat with GPT-3.5 (still wildly capable), while Google Assistant gives you robust voice automation out of the box. 

If you’re looking for free creative tools, StarryAI and Lensa also offer no-cost versions to generate AI art or enhance photos. Just note that some apps may offer premium tiers or paywalled features down the line.

Best AI Chat Apps

If your priority is conversation—whether for research, brainstorming, or support—AI chat apps are where this technology really shines.

What are the best AI chat apps?

ChatGPT, Claude, Microsoft Copilot, Cleo, and Perplexity are among the best AI chat apps available in 2025. These tools make chatting with an AI feel natural and intuitive, with real-time feedback, helpful summaries, and even code generation.

Claude stands out for its more thoughtful, safety-focused conversations, while Perplexity backs up its responses with real sources. Cleo is built entirely around chat, giving you a money-savvy financial assistant that talks like a friend. And if you’re already in the Microsoft or Google ecosystem, Copilot and Gemini offer powerful, context-aware chats that tie in with your email, docs, and tasks.

しかし、どうすれば最適なAIアプリを選択できますか？

AIアプリを選ぶ際には、次の点を考慮してください: