What is AudiFlo?
AudiFlo is a free, privacy-first audiobook and AI text-to-speech (TTS) app for Android. It converts EPUB eBooks, PDFs, DOCX documents, TXT files, and web novels into human-grade AI audio with 100% on-device speech synthesis, zero-shot voice cloning, and zero data streaming.
1. Platform Architecture & Overview
Key pillars that define the AudiFlo reading & listening experience.Free Android Application
AudiFlo is the official audiobook and AI text-to-speech app on Google Play (com.audiflo.zrota.app) and at audiflo.app.
Built for Long-Form Reading
Designed for multi-character dialogue narration, custom speech pacing, auto-scrolling line focus, and sleep timers.
100% On-Device AI Execution
Neural speech models execute locally on smartphone hardware — zero data streaming, zero cloud upload fees, and 100% offline privacy.
2. Supported Content Formats
Import books, documents, articles, and web novels seamlessly.EPUB eBooks & Covers
Full EPUB document parsing with cover extraction, inline image rendering, chapter table of contents, and series grouping.
PDF OCR & Scanned Text
Optical Character Recognition (OCR) extracts text from scanned PDF pages, textbooks, research papers, and image documents.
Web Novels & .aflo Packages
Built-in web novel chapter auto-detection and encrypted .aflo package exports for easy document sharing.
3. Four Distinct Audio Player Modes
Tailored interfaces engineered for every type of reading preference.Narrative Player
Karaoke-style line highlighting follows spoken sentences with auto-scroll focus, page controls, and sepia/dark themes.
Character Drama Player
Assigns distinct AI voices to novel characters and narrator lines with Binaural 3D Surround Sound for headphone theater audio.
GenAI Lyrical Player
Converts books into a music-player interface complete with synchronized scrolling lyrics, equalizers, and ambient soundscapes.
Simple Saver Mode
Minimalist player optimized for minimum battery and RAM overhead during workouts, commutes, or lock-screen listening.
4. Halo Engine, Orion Engine & Voice Cloning
Dual neural voice architectures engineered for studio realism and high-speed multi-lingual speech.Flagship Voice Cloning
Zero-shot local voice cloning via a 5–15 second live mic recording or WAV file import. Delivers studio-quality acoustic intonation.
Halo Setup Guide →30+ Global Languages
High-efficiency offline AI speech synthesis across 30+ international languages with hardware auto-tuning (Low, Mid, High tiers).
Orion Setup Guide →AES-256 Encrypted Packages
Your uploaded voice samples and personal documents stay on your phone, protected by local AES-256-GCM package encryption.
Read Privacy Tech →5. Custom Pronunciation & Speech Pacing
Fine-tune word pronunciations, unit abbreviations, and acoustic silence pauses.Regex Pronunciation Rules
Create Regular Expression replacement patterns to fix mispronounced fantasy names, scientific terms, or acronyms.
\b(Dr\.)\b → Replace: "Doctor"
One-Tap Unit Presets
Import built-in dictionaries to pronounce standard unit measurements and symbols naturally during listening.
Millisecond Heading Pauses
Adjust exact pause duration (in ms) after headings, paragraphs, and sentence stops for natural acoustic pacing.
6. Community Referral & Rewards Program
Invite friends to unlock Custom Voice Cloning and Binaural 3D Audio 100% free!1 Month Free Premium
Unlocks Custom Voice Cloning slots instantly upon account activation.
+1 Extra Month Free
Unlocks Binaural 3D Surround Sound multi-character narration.
4 Months Free Total!
Unlocks maximum free Premium rewards and permanent leaderboard status.
7. Related Deep-Dive User Guides
Explore related technical articles and capability breakdowns.Best Free Audiobook App
See why readers choose AudiFlo for daily free listening over paid subscription apps.
Read Guide →Top TTS Player Guide
Review the criteria that define a high-quality text-to-speech reading application.
Read Guide →Free Audiobook & TTS App
Get a compact overview of core reader capabilities and offline trust signals.
Read Guide →8. Frequently Asked Questions
Quick answers about AudiFlo availability, privacy, and licensing.What is AudiFlo in one sentence?
Where can I download AudiFlo?
Does AudiFlo support custom AI voice cloning?
Where can I verify privacy and terms?
Download AudiFlo Today
Convert your eBooks, PDFs, and web novels into natural AI audio with 100% offline privacy.