Echo
For Every Mind — turn listening into learning.
The audiobook player that helps you remember what you heard — word-perfect read-along, one-tap flashcards, and a study system built on the real science of memory.
Built on a mail route
I deliver mail — in and out of the car thirty times a shift, an aux cable, an Apple Watch, and an AuDHD brain that learns from non-fiction audiobooks in stolen, interrupted minutes. No app would loop a single chapter until it stuck, stay ready on a watch after a long pause, or remember why a bookmark was made three driveways ago.
So I built it, nights and weekends around a full delivery route — an app that treats audiobooks the way students treat textbooks. And if you're just here to listen? You never have to make a single flashcard.
Read-along is where most apps stop
Sync gets you to the page. Echo gets it into your head.
Chapter sync — table stakes. Match your audiobook to your ebook chapter by chapter. A growing crowd of apps does this; Echo does too.
Word-perfect read-along. Echo follows the narrator word by word — true karaoke, aligned on-device to the real audio (WhisperKit + CoreML), not snapped to the nearest chapter.
Turn it into memory. One tap makes any passage a spaced-repetition flashcard with its audio snippet attached — reviewed on iPhone, Watch, and Mac until you own it.
What Echo does
A serious study system, out of the way until you want it.
Everything below is in the current TestFlight beta unless marked — Echo is in open development toward 1.0.
Smart Rewind
Hit play and Echo has already rewound — a little after a short pause, more after hours. Interruptions stop costing you context.
Chapter Looping
Repeat one chapter until you own it — the feature Echo was born for. Or loop the exact passage between two bookmarks.
Built-in Spaced Repetition
An Anki-style flashcard system with FSRS / FSRS-4.5 scheduling and the narrator's audio on the cards — daily review, hands-free on Apple Watch.
Synced EPUB Reader
Text scrolls with the narration. Tap a paragraph to jump the audio; search the book and leap to the spoken moment.
Voice & Photo Bookmarks
Hold a button and speak your thought, or attach a photo of where you are — memos play back inline when the narration returns there.
A Watch Remote You Design
Up to 25 buttons across 5 pages, Digital Crown scrubbing, plus a Pomodoro focus timer on your wrist.
Built for CarPlay
Full Now Playing plus a browseable library — with in-dash buttons to bookmark, record a memo, or mark a passage on the road.
Pitch-Corrected Speed
Narrators sound human at 1.25× — zero pitch distortion, and every book remembers its own speed.
Dyslexia-Friendly by Design
Lexend and OpenDyslexic built in, Dynamic Type, VoiceOver labels. Designed for interrupted, neurodivergent attention first.
Mark Now, Card Later
One tap marks a passage without stopping the narration; the Card Inbox turns marks into flashcards when you have the bandwidth.
Second-Brain Export
One tap exports a book's bookmarks, notes, memos, photos, and flashcards as clean Markdown — straight into Obsidian, Logseq, or Notion.
On-Device AI Narration
Natural narration for text-only EPUBs, generated entirely on your device — no cloud, no API calls. Books never recorded can still be heard.
Insights That Are Real
Listening time, streaks, chapter coverage, retention curves — honest numbers from your actual listening, never from a server.
Radically private
No accounts, no analytics, no tracking, no servers.
Open source
GPL-3.0, public on GitHub — the whole app.
No locked files
Built around DRM-free files you own and can see.
For Every Mind
Designed for interrupted, neurodivergent attention first.
Echo Pro, once
Optional power features as a one-time unlock. No subscription.
Echo is in open beta right now.
TestFlight builds for iPhone, Apple Watch, Mac, and CarPlay — guides, test plans, and a devlog included.