BookFusion Voice is a neural text-to-speech engine that brings natural-sounding AI voices to your Android device. Once downloaded, voices work completely offline — your text never leaves your device.
Browse and download from over 100 voices across 38+ languages, including English, Spanish, French, German, Italian, Portuguese, Russian, Ukrainian, Polish, Czech, Dutch, Danish, Swedish, Norwegian, Arabic, Hebrew, Farsi, Hindi, Chinese, Vietnamese, Turkish, Greek, Romanian, and many more.
Each voice is available in multiple quality tiers — low, medium, and high — so you can choose the right balance between naturalness and performance for your device.
FEATURES
- Natural-sounding neural AI voices
- 100% offline after download — no internet required for speech synthesis
- 38+ languages with multiple voices per language
- Low, medium, and high quality tiers for each voice
- Voice preview to test before choosing
- Download size shown for every voice
- Automatic performance testing after download — slow voices are flagged so you know what works best on your device
- Adjustable speech speed (0.5x to 2.0x)
Works with any app that uses Android text-to-speech: book readers, accessibility tools, TalkBack, navigation, and more.
PRIVACY
All speech synthesis happens locally on your device. Your text is never sent to any server. The app only connects to the internet to fetch the voice catalog and download voice files.
View on Google Play StoreFree or paid:
- Free
Accessibility and User Comments:
BookFusion Voice is a TTS engine for Android devices, supporting different languages. It uses Piper neural voices.
Upon installing BookFusion and launching it, the main screen contains the following layout:
- On the top-left, extending about halfway across the screen, is the title of the app — BookFusion Voice.
- On the top-right corner is the “Close” button, which closes the app when tapped.
- Below the title is a dropdown for language selection. By default, it is set to English. Do not swipe from the “Close” button, as doing so skips over the language selection dropdown.
- To the right of the language selection dropdown is the “Voice quality” option. When tapped, it shows three choices: Low, Medium, and High. By default, only the Low and Medium voices appear without opening the Voice quality menu. The High variants do not appear unless you open the dropdown and select “High.” Once selected, the High voices appear alongside the other voices. You must use the back gesture or press the Back button (if using button navigation), as tapping any of the three options does not close the menu and return to the main screen. This differs from the language dropdown, where selecting a language closes the menu automatically.
- Below that are the available voices.
- Each voice initially has a single “Download” button located on the right edge of the screen. Tapping it downloads the selected voice.
- After a voice is downloaded, the “Download” button is replaced by two buttons: “More” and “Play.” For example, if the English (U.S.) voice “Brice” is downloaded, the options shown next to “Brice” are “More” and “Play.” Tapping “Play” plays the selected voice. Tapping “More” opens a menu with a “Delete” option, which removes the downloaded voice.
It is also worth mentioning that tapping “Play” selects that voice as the active voice. When BookFusion is chosen as the TTS engine in system settings, the selected voice will be used.
Apparent Issues
As mentioned earlier, there is no option to preview a voice before downloading it.
When more than one voice is downloaded, selecting a different voice from the Text-to-Speech settings (via “Engine settings” next to “Preferred engine”) does not always persist. After returning to the Text-to-Speech screen, the engine may switch to another downloaded voice automatically. In my case, it defaulted to the Amy voice.
Additionally, there is currently no way to increase the speech rate beyond a certain value — a value that might be considered slow for some users.
As for responsiveness, the engine is responsive, though it does not yet reach the level of traditional TTS engines.
Accessibility
Regarding accessibility, no major issues were found.
It is good to see another TTS engine available that can be used either as a system-wide engine or for reading books.
Audio Demonstration
You can listen to my audio demonstration of BookFusion Voice here.
Last Tested App version and Android version:
App version: 1.1.3-0304-8489, Android 16
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