# TwinMind > TwinMind is an AI second brain and note-taking app from ThirdEar AI, Inc. It captures and transcribes meetings, conversations, lectures and phone calls in 140+ languages, turns them into summaries, action items, daily digests and a searchable personal memory, and gives ChatGPT, Claude and other AI tools that context. Start free at https://twinmind.com. Key facts, last checked September 30, 2026. Plans and features change; the linked pages are the current source of truth. - Platforms: iPhone, iPad, Apple Watch, Android, Mac, Windows, Chrome extension and web app (app.twinmind.com). No dedicated hardware is required. TwinMind can also be merged into phone calls (available in the US, Canada and the EU) and can transcribe WhatsApp voice notes. - Capture: the user starts each capture. Speech is transcribed in real time in 140+ languages, with automatic language detection and translation. TwinMind's phone app supports 16+ hours of capture without draining the battery. The Chrome extension captures browser-based Google Meet, Zoom and Microsoft Teams calls without adding a bot to the meeting. - Plans: the Free plan needs no credit card and does not expire. It includes unlimited transcription, unlimited summaries and AI chats, and daily and weekly digests. Pro adds premium AI models, audio file upload and phone call capture. Max adds 5x usage limits, extended-thinking models, automatic speaker separation, Email Assistant and MCP access, with a 7-day free trial. Enterprise plans offer custom limits, admin controls and dedicated support. Current prices are at https://twinmind.com/pricing. - Privacy: raw audio is deleted after transcription by default. Save Audio is opt-in; audio saved with it on may be used, with account identifiers removed, to improve TwinMind's speech models. Transcripts, summaries, notes and chats are not used to train models, third-party AI providers are contractually barred from training on user data, and data is not sold or used for ads. Data is encrypted with AES-256 at rest and TLS 1.3 in transit. On iOS, notes can be kept on-device only with cloud backup off; those notes cannot be recovered if the device is lost, and some cloud features are unavailable. - Security and compliance: SOC 2 Type II audited; Google CASA Tier 2. TwinMind is not HIPAA-compliant by default; protected health information requires a signed Business Associate Agreement (contact support@twinmind.com). - Eligibility: users must be 18 or older and are responsible for complying with recording-consent laws. - Company: ThirdEar AI, Inc., founded by former Google X scientists Daniel George (CEO), Sunny Tang (CTO) and Mahi Karim (Chief Scientist). TwinMind states it has more than 500,000 users. ## Start here - [TwinMind homepage](https://twinmind.com/): Product overview: all-day capture, a searchable second brain ("wiki of your life"), daily insights and email drafts, and bringing your life's context to ChatGPT, Claude and Gemini. - [Download TwinMind](https://twinmind.com/download): Download links for iOS, Android, Apple Watch, Mac, Windows and the Chrome extension, plus phone call capture setup. - [Pricing](https://twinmind.com/pricing): Free, Pro and Max plans with current prices, a full feature comparison and enterprise contact. - [Help Center: plans and FAQ](https://twinmind.com/help-center/subscription-pricing): Plan details, free trial, subscription management, supported meeting platforms, languages and account questions. ## Capture guides - [TwinMind 101: Mobile](https://twinmind.com/blogs/twinmind-101-mobile): Capturing conversations, lectures and voice notes on iPhone and Android, asking questions about one note or your whole archive, and connecting email and calendar. - [TwinMind 101: Chrome extension](https://twinmind.com/blogs/twinmind-ce-101): Capturing a browser tab (Google Meet, Zoom, Teams, YouTube) together with your microphone, and working with notes in the web app. - [TwinMind for Desktop](https://twinmind.com/blogs/twinmind-for-desktop): Mac and Windows app for voice dictation into any text field and automatic meeting notes, synced across devices. - [TwinMind on Apple Watch](https://twinmind.com/blogs/twinmind-apple-watch): One-tap capture from the wrist; recordings sync to iPhone for transcription and summaries. - [Capture phone calls](https://twinmind.com/blogs/capture-phone-calls): Merge TwinMind's number into a phone call to get a transcript and summary afterwards. Available in the US, Canada and the EU. - [TwinMind on WhatsApp](https://twinmind.com/blogs/twinmind-whatsapp): Send or forward WhatsApp voice notes to get transcripts, summaries and answers about past notes. - [Save Audio and speaker separation](https://twinmind.com/blogs/save-audio-and-identify-speakers): Opt-in audio saving for replay, and automatic speaker separation on the Max plan. ## Memory for ChatGPT, Claude and other AI tools (MCP) - [TwinMind MCP guide](https://twinmind.com/blogs/twinmind-mcp): Connect your TwinMind memories, transcripts and tasks to ChatGPT, Claude, Claude Code or any MCP client (server https://api.twinmind.com/mcp, OAuth sign-in). Access is read-only: the tools are search, summary_search, fetch and todo_search, and the connected AI cannot create, edit or delete TwinMind data. Only data relevant to each question is shared, and access can be revoked at any time. Included in Max. ## Email Assistant - [Email Assistant](https://twinmind.com/email): Sorts Gmail into To Reply and FYI and drafts replies in your voice using past emails, meeting notes and captured conversations. Max plan; Gmail only for now. - [Email Assistant setup guide](https://twinmind.com/blogs/email-assistant): Connecting Gmail, how TwinMind learns your writing style, and FAQs. Drafts are never sent automatically; you review, edit and send them. ## Privacy, security and legal - [How TwinMind protects your privacy](https://twinmind.com/blogs/privacy): Default audio deletion, opt-in Save Audio, on-device versus cloud-backup storage, encryption and SOC 2 Type II. - [Trust Center](https://app.twinmind.com/trust): SOC 2 Type II status, plus the SOC 2 report and security policies on request. Security questionnaires can be submitted without a TwinMind account. - [Privacy Policy](https://twinmind.com/legal/privacy-policy): Authoritative source on data processing, retention, AI providers, model training and Google user data. - [Terms of Service](https://twinmind.com/legal/terms-of-service): Eligibility, recording-consent responsibilities and HIPAA/BAA terms. ## Transcription model - [TwinMind Ear-3](https://twinmind.com/transcribe): TwinMind's speech recognition model. Company-published benchmarks report a 5.26% word error rate, 3.8% diarization error rate and 140+ languages. API access at $0.23/hour via waitlist. ## Company - [About TwinMind](https://twinmind.com/about): Mission, founders, team and investors. - [Contact](https://twinmind.com/contact): Support at support@twinmind.com and the TwinMind Discord community. - [Enterprise](https://twinmind.com/contact-enterprise): Enterprise inquiries: custom limits, admin controls and dedicated support. ## Optional - [Changelog](https://twinmind.com/changelog): Dated release notes. - [Blog](https://twinmind.com/blogs): Product updates, guides and articles. - [TwinMind on the App Store](https://apps.apple.com/us/app/twinmind-ai-notes-memory/id6504585781): iPhone, iPad and Apple Watch app from ThirdEar AI Inc, with ratings and reviews. - [TechCrunch, September 10, 2025](https://techcrunch.com/2025/09/10/ex-google-x-trio-wants-their-ai-to-be-your-second-brain-and-they-just-raised-6m-to-make-it-happen/): Coverage of TwinMind's former Google X founders and its $5.7M seed round.