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Best Second Brain Sb Apps

244+ iOS apps curated and reviewed

4.6 avg rating
20 free apps
Updated June 2026

Second Brain SB is the household name in second brain sb, but it's far from the only option. We track 244+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.

Top Picks for Second Brain Sb

Perplexity - AI Search & Chat#2

Perplexity - AI Search & Chat by Perplexity AI Inc.

Ask. Research. Trusted Answers
Strong Contender
📊 Productivity
4.8😊(480K ratings)
FreeIn-App Purchases
#5in Productivity
Perplexity - AI Search & Chat screenshot 1
Perplexity - AI Search & Chat screenshot 2
Perplexity - AI Search & Chat screenshot 3
Perplexity - AI Search & Chat screenshot 4
Perplexity - AI Search & Chat screenshot 5
Perplexity - AI Search & Chat screenshot 6

Get accurate, source-backed answers to any question with this AI-powered search and chat tool. It leverages top AI models for deep research, drafting emails, and more, syncing across devices. Discover new information and organize your findings in a personal library.

What We Love

  • 🚀 Saves time, fast and efficient
  • 🔍 Comprehensive and detailed answers
  • 📚 Provides sources and citations
  • 🤖 Excellent AI-powered search

Room to Improve

  • 🐛 Occasional bugs and glitches
  • 🔒 Restrictions on VPN usage
  • 💰 Expensive subscription
Chat Smith: AI Chatbot & Agent#3

Chat Smith: AI Chatbot & Agent by Vulcan Labs Company Limited

Study, Writing, Research Agent
Worth Considering
📊 Productivity
4.6😊(166K ratings)
FreeAdsIn-App Purchases
#35in Productivity
Chat Smith: AI Chatbot & Agent screenshot 1
Chat Smith: AI Chatbot & Agent screenshot 2
Chat Smith: AI Chatbot & Agent screenshot 3
Chat Smith: AI Chatbot & Agent screenshot 4
Chat Smith: AI Chatbot & Agent screenshot 5
Chat Smith: AI Chatbot & Agent screenshot 6

This AI assistant offers advanced capabilities for writing, research, and image generation. It leverages multiple powerful AI models to provide deep insights, create content, and simplify tasks. Ideal for students, professionals, and creatives seeking enhanced productivity.

What We Love

  • 🚀 Efficient and fast
  • 👍 User-friendly interface
  • 💡 Helpful for writing and research
  • 🤖 Impressive AI capabilities

Room to Improve

  • 🔒 Limited free usage, requires subscription
  • 🐛 Inconsistent performance, sometimes inaccurate
  • 🤖 AI responses can be biased or lack context

More Second Brain Sb apps to explore

4
AI Chatbot: Pixi
AI Chatbot: Pixi
AI Chatbot: Pixi
Chat built on top Al models
Free

This AI-powered app offers a suite of tools for writing, content creation, and task simplification. It leverages advanced AI models to generate images, logos, summaries, and assist with various writing needs. Users can also interact with AI expert assistants for advice and support.

AI Writing AssistantText-to-Image CreationLogo Studio
📊 Productivity
(12K)
free with in-app purchases
5
BrainGain - Brain Training
BrainGain - Brain Training
BrainGain - Brain Training
Solve Puzzles & Quizzes Daily
Free

Engage in daily brain training with adaptive games and mental tests designed to improve memory, focus, problem-solving, math, and language skills. Choose short bursts or longer sessions to fit your schedule and track your progress.

Adaptive cognitive gamesDaily brain workoutsBuild memory and focus
📚 Education
(22K)
free with in-app purchases
6
Vidmor-AI Video Generator
Vidmor-AI Video Generator
Vidmor-AI Video Generator
AI Video Maker&Photo to Video
Free

This app uses AI to generate images and videos from text prompts and existing images. It offers a variety of creative tools, templates, and effects to help users create engaging social media content quickly and easily, even without editing experience.

AI Text-to-Image generationImage Style Transfer with 100+ filtersAI Text-to-Video creation
🎨 Graphics & Design
(4.2K)
subscription
7
Notion: Notes, Tasks, AI
Notion: Notes, Tasks, AI
Notion: Notes, Tasks, AI
Task & project management app
Free

This AI-powered workspace helps you write notes, manage tasks, organize projects, and collaborate with others. It offers features like AI meeting notes and interactive maps to streamline your workflow for personal, student, or professional use.

AI-powered note-taking and summarizationTask and project managementCollaborative workspace
📊 Productivity
(87K)
free with in-app purchases
8
Brainbuddy: Quit PMO
Brainbuddy: Quit PMO
Brainbuddy: Quit PMO
Site Blocker Addiction Tracker
Free

This app helps users break free from digital habits and addictive behaviors through a neuroscience-based approach. It offers educational programs, progress tracking, and community support to rewire the brain and improve self-control.

Neuroscience-based habit rewiring program100-day evidence-based educationProgress tracking and daily checkups
💪 Health & Fitness
(25K)
free with in-app purchases
9
AI Chat Assistant – ChatNow
AI Chat Assistant – ChatNow
AI Chat Assistant – ChatNow
Built on Gemini, GPT, Grok 4
Free

This AI assistant helps busy individuals boost productivity by handling tasks like writing emails, generating code, creating images, and summarizing documents. It supports voice input, file uploads, and image analysis, leveraging multiple advanced AI models for diverse needs.

Voice mode for real-time conversationsImage and video generationWriting and grammar assistance
📊 Productivity
(135K)
free with in-app purchases
10
Chatbot AI Assistant - Genie
Chatbot AI Assistant - Genie
Chatbot AI Assistant - Genie
AI Chatbot & Image Generator
Free

This AI-powered assistant helps with work, study, and creative projects. It offers advanced chat, image generation and editing, document analysis, and web search capabilities. Get instant insights and create visuals from text descriptions.

Advanced AI ChatbotAI Image GeneratorAI Image Editor
📊 Productivity
(198K)
free with in-app purchases
11
Kimi - Kimi K2.6 is Live
Kimi - Kimi K2.6 is Live
Kimi - Kimi K2.6 is Live
K2.5·Visual·Agent·Code·Office
Free

This AI-powered agent assists with coding, content creation, and office tasks. It can generate presentations, build websites from designs, and perform complex research with autonomous sub-agents for enhanced efficiency. Handle large documents and detailed conversations with its extensive context window.

Autonomous sub-agent creation for parallel efficiencyCode, create, analyze, and build presentationsAutomate workflows with scheduled tasks and long-term memory
📊 Productivity
(4.6K)
freemium
12
AI ChatBot Assistant: AskEasy
AI ChatBot Assistant: AskEasy
AI ChatBot Assistant: AskEasy
Top Chat Built on All Models
Free

This AI assistant helps with daily tasks, answering queries, writing content, and generating images. It can also summarize documents, translate languages, and create captions for photos, making life more efficient and fun.

AI Image GeneratorAI Writing AssistantUpload and Ask (PDFs)
📊 Productivity
(30K)
subscription
13
Chat AI 5: AI Agent & Video
Chat AI 5: AI Agent & Video
Chat AI 5: AI Agent & Video
One Chatbot All Top AI Models
Free

This app offers a voice-first AI assistant that leverages top AI models for tasks like document creation, research, image generation, and instant answers. It allows users to command AI with their voice to produce written content, analyze data, and manage documents.

Voice-first AI interactionImage generation from voice commandsInstant, accurate answers via Smart AI Routing
📊 Productivity
(1.5K)
free with in-app purchases
14
Chatbot AI Assistant ChatPrime
Chatbot AI Assistant ChatPrime
Chatbot AI Assistant ChatPrime
Top AI Models, Image Generator
Free

Access advanced AI models for text generation, coding, learning, and image creation in a single application. Engage in smarter conversations, get real-time insights, and produce stunning visual results with cutting-edge AI engines.

Advanced text generationMultilingual conversationsReal-time insights
📊 Productivity
(4K)
free with in-app purchases
15
Auri AI Keyboard & Assistant
Auri AI Keyboard & Assistant
Auri AI Keyboard & Assistant
Voice Dictation, Notes & Chat
Free

This AI-powered keyboard and assistant helps you write faster, smarter, and error-free in over 80 languages. It can draft emails, transcribe voice memos, create notes, check grammar, and translate conversations, all from your keyboard.

AI-powered keyboard with dictationEmail drafting and response generationVoice memo transcription and summarization
📊 Productivity
(1.3K)
freemium
16
Building a Second Brain
Building a Second Brain
Building a Second Brain
by Forte Labs, LLC
Free

This app helps you manage information overload and achieve your goals through personal knowledge management. Connect with a community focused on productivity and digital organization for a more peaceful and purposeful life.

PARA Method Mini-CourseCommunity HubExclusive event invitations
🌐 Social Networking
(10)
free
17
TeraBox: 1TB Cloud & AI Space
TeraBox: 1TB Cloud & AI Space
TeraBox: 1TB Cloud & AI Space
Data Backup & Smart AI Tools
Free

This app offers 1024GB of free cloud storage for automatic file backup and synchronization across devices. It also integrates a suite of AI tools for smart searching, image creation, transcription, video playback with subtitles, and document management.

1024GB Free Cloud StorageAutomatic Data BackupAI-Powered Search & Browsing
📊 Productivity
(19K)
freemium
18
Sider: AI GPT Deep Chat
Sider: AI GPT Deep Chat
Sider: AI GPT Deep Chat
Top AI Models All in One.
Free

This AI assistant offers access to multiple advanced language models for tasks like summarization, writing, image generation, and homework help. It also functions as a knowledge base, allowing users to chat with documents and websites, and engage with diverse AI characters.

Access to multiple top AI modelsSummarize documents and articlesGenerate creative images from text
📊 Productivity
(4.1K)
free with in-app purchases
19
ChatBox AI - Chatbot Assistant
ChatBox AI - Chatbot Assistant
ChatBox AI - Chatbot Assistant
Top Al models・Image Generator
Free

This AI-powered assistant offers a suite of tools for text generation, image creation, document processing, and real-time information retrieval. It can help with writing, problem-solving, brainstorming, and even generating music and stories.

AI text generationAI image generationDocument summarization and translation
📊 Productivity
(163K)
free with in-app purchases
20
AI Chatbot - Ask AI Anything‎
AI Chatbot - Ask AI Anything‎
AI Chatbot - Ask AI Anything‎
Built on OpenAI ChatGPT & GPT5
Free

This app provides a sophisticated conversational experience by leveraging advanced language models like ChatGPT, Grok, and Claude. It understands natural language and generates human-like responses for a wide range of topics and tasks. Features include email automation, document generation, and visual analysis.

Conversational AI assistantEmail reply automationDocument content generation
📊 Productivity
(121)
free with in-app purchases