Echo: Audiobook Study Player

June 10, 2026

Echo: Audiobook Study Player

For Every Mind — turn listening into learning.

Most audiobook apps are built for passive listening. Echo is the audiobook player that helps you remember what you heard: search across spoken content, jump to any passage, create flashcards from what you hear, and review with spaced repetition — all without leaving the audio.

Built on a mail route

Echo's creator delivers mail — in and out of the car thirty times a shift, no CarPlay, an aux cable, and an AuDHD brain that learns from non-fiction in stolen, interrupted minutes. No app on the internet would loop a single chapter until it stuck, stay ready to play on a watch after a long pause, or remember why a bookmark was made three driveways ago. So he built it. Designed for neurodivergent listeners first — and like curb cuts, better for everyone whose attention gets interrupted. Which is everyone.

What Echo does

Echo is in open development toward 1.0. Anything marked 🚧 Coming in 1.0 is being built right now; 🔭 Roadmap means planned after 1.0. Everything else ships in the current beta.

• 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.
• Photo Bookmarks: Attach a photo of where you are; the player artwork switches to your photo as you pass that moment again. Your brain files where alongside what — Echo turns that into a memory tool.
• Voice Memo Bookmarks: Hold a button, speak your thought. Memos play back inline when the narration reaches them.
• Spaced Repetition (SRS): An Anki-style flashcard system (SM-2) with the narrator's audio on the cards, daily review, and hands-free review on Apple Watch.
• Mark Now, Card Later 🚧 Coming in 1.0: One tap (phone or watch) marks a passage without stopping the narration; the Card Inbox turns marks into flashcards when you have the bandwidth — not mid-sentence.
• Decks, Tags & Anki Import 🚧 Coming in 1.0: Organize cards into decks, edit any card, review per deck — and import real .apkg Anki decks, scheduling history included.
• Brain Dump 🚧 Coming in 1.0: A thought hits mid-chapter? Park it — text or voice, even dictated from the watch — without pausing the book. Promote keepers to bookmarks or flashcards later.
• Context Memory 🚧 Coming in 1.0: Opt in and Echo quietly notes where you were — on bookmarks, sessions, and chapter starts. Approximate, on-device, deletable.
• Insights 🚧 Coming in 1.0: Listening time, streaks, chapter coverage ("Ch 7 — 86%, heard 3×"), retention curves, review forecasts — honest numbers from your actual listening, never from a server.
• Synced ePub & PDF Reader: The text scrolls with the narration, diagrams appear when mentioned, tap a paragraph to jump the audio, search the book and leap to the spoken moment.
• On-Device Auto-Alignment: Echo's speech recognition (WhisperKit + CoreML) aligns text to audio in tiers — chapter snap, drift detection, word-level repair. Entirely on your device.
• Second-Brain Export 🚧 Coming in 1.0: One tap exports a book's bookmarks, notes, voice memos, photos, and flashcards as a clean Markdown bundle — straight into Obsidian, Logseq, or Notion. No account, no lock-in.
• Study Sync via iCloud 🚧 Coming in 1.0: Flashcards, decks, bookmarks, and playback position follow you between iPhone, Mac, and Watch through your personal iCloud — Echo runs no servers.
• A Watch Remote You Design: Up to 25 buttons across 5 pages, Digital Crown scrubbing or volume, plus a Pomodoro focus timer on your wrist.
• Pristine Speed Control: Pitch-corrected speed — narrators sound human at 1.25×. Every book remembers its own speed.
• Dyslexia-Friendly by Design: Lexend and OpenDyslexic fonts built in, Dynamic Type, VoiceOver labels.
• Chapter Study Mode 🔭 Roadmap: Treat chapters like flashcards — listen, grade yourself, and your due chapters become today's listening queue.

Private by design: no accounts, no analytics, no tracking, no servers. Open source under the MIT license.

Available on iOS, macOS, and watchOS — with widgets, CarPlay, and Siri bookmarks.

Learn more

• Getting the Most Out of Echo — every feature plus the memory science behind it
• The Focus Field Guide — ADHD & AuDHD strategies: getting started, time blindness, organization, motivation, hyperfocus
• User Manual — the complete reference for every platform, including library organization
• Join the Beta — TestFlight guide and test plans
• Building Echo: The Devlog — how it was built, week by week
• Help & Support — FAQs and contact

View Source Code on GitHub | Project Site | Get Help & Support