Modern T9
Predictive T9 keyboard with no network access and no telemetry
- Developer
- Juan Castellon
- License
- GPL-3.0-or-later
- Package
io.github.jcastell7.modernt9- Category
- Keyboard & IME, Writing
- Latest version
- 1.0.4 · Oct 2, 2026
- Minimum Android
- Android 8.0
Screenshots
Description
Nine-key predictive text for current Android, and nothing else. Modern T9 declares no permissions at all — without the INTERNET permission the system would refuse a network connection even if the keyboard attempted one.
A keyboard is the most privileged app on a phone: it sees every password, every message, every search. Modern T9 is built so that privilege costs you nothing.
Privacy by construction
• No INTERNET permission and no networking code of any kind.
• No analytics, ads, telemetry or crash reporting.
• Learned words and saved phrases stay in app-private storage, as plain text files you can read yourself.
• Clipboard history is held in memory only and is never written to disk.
• Android's backup carries your settings and deliberately leaves your dictionary behind.
Typing
• Real T9 prediction over English (US) and Spanish (Latin America) dictionaries — one language at a time, or both at once.
• ABC multi-tap when you would rather spell a word out letter by letter.
• A strip down the left side for saying which letter a key meant, accented forms and ñ included.
• Saved phrases for email addresses, URLs and handles: tap the first few keys of the code and the whole thing is offered.
• It learns the words you actually use, so they move to the front over time.
• Long-press a key for accents and symbols; flick a key downward for its digit.
• Closing punctuation attaches to the word you just finished instead of drifting off after a space.
• Tap into a word to reopen it and choose a different spelling in place.
• An editing pane with cursor keys, selection, copy, cut, paste and undo. A clipboard history. An emoji picker.
• Adjustable keyboard height and clearance above the navigation bar.
The prediction engine sits behind a small interface and is a replaceable module, so a different backend can be dropped in without touching the keyboard itself.
Free software under the GNU General Public License, version 3 or later. The dictionaries are built from the OpenSubtitles 2018 word frequency lists published by HermitDave/FrequencyWords, used under CC BY-SA 4.0.
A keyboard is the most privileged app on a phone: it sees every password, every message, every search. Modern T9 is built so that privilege costs you nothing.
Privacy by construction
• No INTERNET permission and no networking code of any kind.
• No analytics, ads, telemetry or crash reporting.
• Learned words and saved phrases stay in app-private storage, as plain text files you can read yourself.
• Clipboard history is held in memory only and is never written to disk.
• Android's backup carries your settings and deliberately leaves your dictionary behind.
Typing
• Real T9 prediction over English (US) and Spanish (Latin America) dictionaries — one language at a time, or both at once.
• ABC multi-tap when you would rather spell a word out letter by letter.
• A strip down the left side for saying which letter a key meant, accented forms and ñ included.
• Saved phrases for email addresses, URLs and handles: tap the first few keys of the code and the whole thing is offered.
• It learns the words you actually use, so they move to the front over time.
• Long-press a key for accents and symbols; flick a key downward for its digit.
• Closing punctuation attaches to the word you just finished instead of drifting off after a space.
• Tap into a word to reopen it and choose a different spelling in place.
• An editing pane with cursor keys, selection, copy, cut, paste and undo. A clipboard history. An emoji picker.
• Adjustable keyboard height and clearance above the navigation bar.
The prediction engine sits behind a small interface and is a replaceable module, so a different backend can be dropped in without touching the keyboard itself.
Free software under the GNU General Public License, version 3 or later. The dictionaries are built from the OpenSubtitles 2018 word frequency lists published by HermitDave/FrequencyWords, used under CC BY-SA 4.0.
All versions
| Version | Released | Minimum Android | Size |
|---|---|---|---|
| 1.0.4 | Oct 2, 2026 | Android 8.0 | 3.6 MB |
How to install an older version of an Android app · How to install an APK file on Android
From the developer (GitHub)
APK files published by the developer on GitHub. They are signed by the developer and may not install over the other builds on this page (different signature). Links open github.com.
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