TTSLexx
TTSLexx Summary
TTSLexx is a mobile Android app in Tools by netttsengine. Released in May 2021 (4 years ago). It has about 15M+ installs and 24.2K ratings with a 3.73★ (average) average. Based on AppGoblin estimates, it reaches roughly 521.1K monthly active users . Store metadata: updated Dec 12, 2025.
Recent activity: 13.3K installs this week (67.6K over 4 weeks) showing steady growth , and 13 new ratings this week View trends →
Data tracking: SDKs and third-party integrations were last analyzed on Mar 25, 2025.
Store info: Last updated on Google Play on Dec 12, 2025 .
3.73★
Ratings: 24.2K
Screenshots
App Description
An app that allows you to create a custom dictionary for Google Text-to-Speech.
TTSLexx is an application that allows you to create and use a custom dictionary for Speech Services by Google.
It is most useful for languages with stress mark such as Russian, but can also help improve reading in other languages.
At least by making it easier to use "network" (online) voices.
Read more on the app site https://sites.google.com/view/netttsengine/main/ttslexx
Supported languages: Bangla, Chinese, English, French, German, Gujarati, Hindi, Indonesian, Italian, Japanese, Kannada, Korean, Malayalam, Marathi, Portuguese, Russian, Spanish, Tamil, Telugu, Thai, Turkish, Ukrainian, Urdu, Vietnamese.
It is a “quasi-TTS”, add-on on top of Google TTS, which changes the text according to your dictionary when transferring text from book reading applications to Google's text-to-speech service.
*********IMPORTANT WARNING**********
TTSLexx is not recommended for use with critical applications, such as TalkBack.
The possibility of TTSLexx work is totally dependent on Speech Services by Google.
TTSLexx does not support output to an audio file.
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Some of the features of TTSLexx:
- Built-in editor that creates a TTS.lexx dictionary in the app's internal storage. (It can be accessed using:
- notification
- the Share function, which is available in almost all readers
- FastSet (https://play.google.com/store/apps/details?id=sia.netttsengine.fastset).
In the editor, with a swipe left and right, you can see what TTSLexx is receiving from the reader app and what, after processing, is passed to Google TTS.
TTSLexx picks up all dictionary changes "on the fly".
The dictionary can be imported and exported to create a backup. (This is especially necessary before updating or reinstalling the app.)
- Selecting and remembering a voice to read, independent of the default Google voice.
- Removing periods at the end of sentences to avoid reading abbreviations (which are often not abbreviations).
- Additional text processing for the Russian language (cleaning, some standardization, replacing e with ё in unambiguous cases, etc. for the correct use of the dictionary).
- Support for "network" voices with the ability to use a separate NET.lexx dictionary for them. ("Network" voices require a quality Internet connection, in return reducing the number of errors in pronunciation b