[Beta Testing] Piper Neural TTS for Android – Fast, Offline, Open-Source Neural Speech

Hi everyone,

Many in the accessibility community know Piper as a fast, local neural text-to-speech engine. Following the launch of our iOS and macOS applications, we are excited to announce that Piper Android Mobile TTS has officially passed Google Play review, and our Closed Beta is now open!

What is Piper Mobile TTS?
Piper acts as a native system-level speech engine rather than just a standalone player. It brings high-quality, neural voice synthesis directly to your mobile device with zero cloud dependency. Once installed and configured, Piper integrates directly into Android's system Text-To-Speech settings, allowing it to drive TalkBack, screen readers, e-book readers, and assistive workflows seamlessly across the OS.

Key Highlights & Features:

• 100% On-Device & Privacy-First: All speech synthesis happens locally on your hardware. Your text is never sent to remote servers, and no telemetry or cloud tracking is involved. Once you download your chosen voice models, no internet connection is required.

• Native Accessibility Integration: Built specifically to work as a system TTS service. Once enabled in Android Accessibility settings, it functions across all apps using standard system speech interfaces.

• High-Fidelity Neural Speech: Powered by lightweight VITS/ONNX neural models, offering natural-sounding prosody, clear pronunciation, and smooth pacing without heavy CPU overhead.

• In-App Voice Management: To keep the initial download size light, voices are managed inside the app. You can sample, download, and manage a wide range of global languages and regional voice profiles directly from the catalog.

• Fully Free & Open-Source: GPL/MIT licensed with no hidden paywalls, subscriptions, or token limits.

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How to Setup and Join the Closed Beta:

To comply with Google Play's testing rules, please follow these two steps:

1. Join the Google Testers Group:
https://groups.google.com/g/piper-android-testers

2. Opt-in & Download via Google Play:
https://play.google.com/apps/testing/dev.ihorshevchuk.piper

Quick Setup Tip:
After installing, open the Piper app first to download your preferred voice models. Then navigate to your Android device settings (Accessibility -> Text-to-Speech Output) and select Piper as your Preferred Engine.

Explore Open-Source Code:
Check out our organization, app source code, and shared libraries on GitHub:
https://github.com/piper-tts-apps

We would love to hear your feedback on speech responsiveness, TalkBack navigation, voice clarity, or any issues you encounter during beta testing!