Free
7 free hours every month. Every feature included.
Every technical term, caught.
The fastest, most accurate translation engine
Called on?
Claude has your line.
Live translation in your earbuds
Tidy recordings with a long press
Try it now
Play audio in any language — see for yourself how fast it is.
Live Lecture — Computer Science 101
Recording 12:34
Professor
Can anyone explain why we use recursion instead of iteration for tree traversal?
Can anyone explain why we use recursion instead of iteration for tree traversal?
⚡ Quick Answer
Recursion naturally mirrors the tree structure — each recursive call handles a subtree, so the code stays clean and the call stack tracks our position for us.
Recursion naturally mirrors the tree structure — each recursive call handles a subtree, so the code stays clean and the call stack tracks our position for us.
The fastest, most accurate translation engine
BufferMind's speech engine tops independent accuracy benchmarks. Every word hits the screen as it's spoken, and the translation lands about a second behind — through accents, fast talkers, and mixed languages.
Powered by Claude
Andy, your AI tutor, runs on Claude Sonnet 5 and Opus 5 — the most capable models Anthropic has ever shipped. Summaries, answers, and study notes with real understanding behind them.
Simultaneous interpretation
Put on your headphones and the translation is spoken to you, live — only you hear it, never the room. Like carrying a personal interpreter.
Synced to the cloud, on every device
Record on your phone, pick it up on your Mac or the web — every session syncs automatically. Audio uploads while you're still recording, so a dead battery or a crash can't take your recording away.
Hold to talk, translated both ways
For face-to-face moments: each side holds a button and speaks their own language — the translation appears and speaks out loud instantly. Travel, small talk, real conversations.
Better with friends
Chat, call, and share recordings with friends — send a whole lecture to a friend, swap notes, review together.
Free.
On every screen.
One app, every screen. Every feature unlocked.
iPhone · iPad · Mac · Web
Sign in with one account and everything syncs through the cloud. Record on one device, review on any other.
FAQ
Is it really free? What does it cost?
Yes. The free plan includes every feature — 7 hours of recording and about 20 AI uses a month — with no credit card to start. Pro raises that to 35 hours of recording and about 100 AI uses a month for $9.99/month or $19.99 per 3-month term; Max removes the cap on both recording and AI for $19.99/month or $44.99 per term. A question counts as 1 AI use; review notes or a course analysis count as 3. Cancel anytime from inside the app.
What languages are supported?
60+ languages are auto-detected for transcription and translation — including English, Chinese (Mandarin & Cantonese), Spanish, Hindi, Korean, Japanese, French, German, Arabic, Russian, and more — powered by a single unified real-time speech model. The BufferMind app interface is currently localized in 6 languages.
Which devices can I use it on? Is there a Windows or Android app?
Mac, iPhone, iPad, and any modern browser. The Mac app needs macOS 14 or later on Apple Silicon (M1 and newer); the iPhone and iPad app needs iOS 16.2 or later and an App Store account outside mainland China. Windows has a preview desktop app (a thin shell around the web app); on Android, open BufferMind in your browser. Sign in with the same account and your sessions sync automatically across every device.
Can it hear online meetings and videos, not just my own voice?
Yes, on Mac, iPhone, iPad and in the browser. The Mac app captures the audio playing on your computer directly, so a Zoom or Google Meet call, a lecture recording or any video is transcribed without going through the microphone. In a Chromium-based browser (Chrome, Edge) you pick the meeting tab and turn on “Also share tab audio”. On iPhone and iPad, switch the source to System Audio and tap Start Broadcast when iOS asks — whatever another app is playing is captured. Phone and FaceTime calls are the one thing iOS keeps off-limits: for those, stay on the microphone and put the call on speaker.
Do I need an internet connection?
Yes. Real-time transcription and translation stream audio to the cloud, so a stable internet connection is required. We're exploring on-device modes as lightweight models mature.
What happens when my monthly allowance runs out?
Recording and AI are two separate allowances, both resetting on the 1st of each month — the sidebar shows both. When one runs out, everything you have already recorded stays exactly where it is, and the other allowance keeps working: out of recording hours, you can still ask Andy about your notes; out of AI uses, you can still record. To keep going before the reset, move up to Pro or Max.
How well does it handle accents and technical terms?
Transcription runs on a real-time speech model built for accented speech and for speakers who switch between languages mid-sentence. For course-specific vocabulary — names, acronyms, formulas — paste your syllabus, notes or glossary into that course's Knowledge Base, and BufferMind uses it as context for its summaries and for Andy's answers.
What can I do with a recording after class?
Every session is saved with the audio, transcript and translation kept in sync — tap any line to jump back to that moment. BufferMind writes a title and a summary for each session, groups them by course, and Andy can answer questions about what was said. Transcripts can be copied or exported as text to share with friends.
Can BufferMind tell different speakers apart?
Yes. Enable speaker identification and BufferMind labels “Speaker 1,” “Speaker 2,” and so on within a session. Voiceprints are processed only during that session by our speech-recognition partner and are never stored by us.
Download for iPhone & iPad
Live captions in class, translated calls on speaker, and Andy to explain what you missed — in your pocket. Sign in with the same account and your sessions sync across every device.
Point your iPhone or iPad camera at the code to open the App Store.
App Store
Download for Mac
Live captions and translation for anything you hear on your Mac — lectures, meetings, videos, calls — floating above whatever you're doing.
Install steps & system requirementsStill on macOS 13? Download the legacy 1.1.5 build — it is frozen and no longer receives updates.
Download for Windows
The BufferMind you use in the browser, in its own window — live captions, translation and notes, with your account and sessions synced. Windows preview: microphone and system audio.
BufferMind
Pricing
Every plan includes every feature. The tiers differ only in monthly recording time and AI usage. Pay monthly, or cover a full term at once.
Pro
For a heavier course load
$9.99/ month
$19.99/ 3 months
Cancel anytime from inside the app.
That's $6.66 a month — save 33%. Cancel anytime from inside the app.
Get Pro- Includes everything in Free, plus:
- 35 hours of live transcription a month
- About 100 AI uses a month (a question counts as 1; review notes or a course analysis count as 3)
- Roughly five classes a week
Max
For the most demanding schedules
$19.99/ month
$44.99/ 3 months
Cancel anytime from inside the app.
That's $15.00 a month — save 25%. Cancel anytime from inside the app.
Get Max- Includes everything in Pro, plus:
- No monthly hour cap on recording (fair use)
- Unlimited Andy: questions, recaps and course analysis (fair use)
- Back-to-back lectures and meetings, with no hours to count
The free plan includes every feature, with a monthly recording and AI allowance and no credit card required. Start free. Max is the tier with no cap on recording or Andy.
Compare plans
Every plan has every feature. Choose by how much you record and how often you ask Andy each month.
| What you get | Free$0No credit card | Pro$9.99 / month$19.99 / 3 monthsCancel anytime | Max$19.99 / month$44.99 / 3 monthsCancel anytime |
|---|---|---|---|
| Live transcription & translation | Monthly allowance | 35 hours a month | No cap (fair use) |
| AI uses (questions, review notes, course analysis) | Monthly allowance | About 100 a month | Unlimited (fair use) |
| Top-up hours | Not available | 10 hours for $3.99, up to two a month | Not needed |
| 60+ languages, auto-detected | Included | Included | Included |
| Andy recaps and PDF export | Included | Included | Included |
| Syncs across iPhone, iPad, Mac, Windows and web | Included | Included | Included |
- Prices in USD. The App Store bills in your local currency. Taxes may apply depending on where you live.
- Subscriptions renew automatically until cancelled. Cancel anytime and keep your plan until the end of the period you paid for.
- Fair use: Max has no hour or question count, but every plan is subject to the fair-use ceiling in our Terms.
- Refunds and billing details: Terms §14.
Billing questions
How do I cancel?
Plans bought on this website: open Settings in the app and choose Manage subscription. Plans bought through the App Store: open your Apple account's Subscriptions. Either way, cancelling stops the next charge and you keep your plan until the end of the current period.
Can I get a refund?
For plans bought on this website, write to support@buffermind.com and we review every request case by case. Plans bought through the App Store are refunded by Apple, not by us: request a refund from Apple at reportaproblem.apple.com. See Terms §14.
How does the 3-month term work?
You pay once for three months at a lower rate than paying monthly. The monthly allowance is the same as on the monthly plan and still resets every month. The term renews every three months until you cancel.
Which currency am I charged in?
Purchases on this website are charged in US dollars; your card issuer converts at its own rate. Purchases through the App Store are priced and charged in your local storefront currency by Apple.
Does one subscription cover all my devices?
Yes. A plan belongs to your account, so it applies on iPhone, iPad, Mac, Windows and the web at once. The Mac app does not sell plans: buy on the website and it applies on Mac. Manage the plan where you bought it.
What is a top-up pack?
Pro subscribers can add 10 hours of recording for $3.99, up to two packs a month, from Settings in the app. Top-up hours never expire and are used after your monthly allowance runs out. If you need more than that every month, Max has no hour cap.
ZCC Labs
About
BufferMind is an AI translation copilot for everyone who lives, studies, and works in a second language.
The buffer in the name
Live a day in a second language and you know the feeling: the gap between hearing something and being ready to respond. You're still translating the last sentence while the room has already moved on. That gap is the buffer — and every international student knows it by heart.
BufferMind exists to close it. Live captions and translation keep you on pace with the room, and Andy — the AI copilot beside your notes — recaps what you missed and helps you speak up with confidence. This isn't a study hack; it's the tool we wished we had in our own lectures.
60+
languages, transcribed and translated live
Mac · iPhone · iPad · Web
one account, synced everywhere
Free
to start — no credit card
Built by ZCC Labs
BufferMind is made by ZCC Labs LLC, a small team that ships every week. Small keeps us fast — student feedback lands in the app in days, not quarters. We believe the best tools disappear: they get out of the way and let you focus on the room you're in.