Lecsy - AI Lecture Transcriber

Lecsy turns lectures into clean, searchable notes — even from the back row of a 200-seat hall.

Hit record at the start of class. Lock your iPhone, take it to your next class, walk back to your dorm. Stop the recording, type
a title, and walk out with a full transcript and an AI summary. Built by an independent developer for university students who
refuse to retype their notes at midnight.

100% free. No ads. No subscription. No credit card. No sign-up required to record.

■ Built for actual lecture halls
• Tuned for distant speakers — quiet professor 30 feet away? Lecsy boosts up to +21 dB before transcription
• Background recording — keeps running when your screen locks, you switch apps, or take a phone call
• Records up to 3 hours per session
• Forget-to-stop notifications — get an alert 30 min and 5 min before auto-stop, plus a confirmation when it saves itself
• Smart auto-pause on phone calls, with auto-resume when the call ends
• Crash recovery — if the app dies mid-lecture, your audio is recovered on next launch
• On-device speech-to-text (WhisperKit) — works in lecture halls with zero Wi-Fi
■ 9 languages, all on-device
English, Japanese, Spanish, French, German, Portuguese, Italian, Russian, Hindi.
Record in any of these. Read your AI summary in any of them. International students: lecture in English, summary in your first
language.

■ AI features
• Key points, section outlines, definitions — extracted in seconds
• Exam Mode — AI generates likely test questions with model answers
• Multilingual output — record in English, get the summary in Japanese (or vice versa)
■ Privacy: your audio file never leaves your iPhone
Your .m4a file is never uploaded anywhere. There is no code path in Lecsy that sends your audio off your device.

■ What actually gets sent to a server (honest version)
◎ Audio (.m4a) — NEVER. Stays on your iPhone.
◎ Transcript text — only if you sign in AND enable Cloud Sync in Settings → Privacy. Off by default.
◎ AI summaries — when you tap the button, the transcript TEXT (not audio) is sent to OpenAI to generate the summary. OpenAI does
not train on API content.
◎ No ads. No advertising SDKs. No behavioral tracking. No IDFA.
◎ Anonymized crash diagnostics via Sentry to fix bugs.
◎ Your data is never used to train AI models.
■ Who Lecsy is for
• Undergrads who can't keep up with fast-talking professors
• International students — read English lectures as Japanese summaries
• STEM majors who need precise transcripts of dense lectures
• Pre-med, pre-law, and grad students prepping from recorded classes
• Privacy-conscious students who want their voice to stay on their device

■ What you get
Recording, transcription, AI summaries, Exam Mode, all 9 languages, optional web access at lecsy.app — all of it, free.

■ Requirements
• iOS 17.6 or later
• On-device speech model setup on first launch (about 1 minute). Much faster on subsequent launches.
• Recording and transcription work fully offline after that
• Cloud sync, AI summaries, and web access require internet

■ Support
Privacy: https://lecsy.app/privacy
Terms: https://lecsy.app/terms
Contact: support@lecsy.app

Built by one independent developer. Bug reports, feature requests, and "this saved my GPA" messages all welcome via the in-app
feedback form.