glissando

A private, offline on-screen keyboard for Phosh

Glide typing · prediction & auto-correction · multilingual · emoji · clipboard · local voice typing

glissando brings the comfort of a modern phone keyboard to Linux phones — glide typing, smart suggestions, cursor control on the space bar — while staying fully on the device. It has no network access at all: no telemetry, no accounts, no cloud. Built for and tested on the FuriPhone FLX1s running FuriOS, and works with any Phosh-based system (Mobian, postmarketOS, PureOS…).

Preview release. This is the first public version. It is already pleasant for daily typing, but expect rough edges — feedback is very welcome!

Glide typing	Suggestions	Russian layout
Emoji with search	Settings app

Features

Typing

• Glide (swipe) typing with a fading trail — 87.7 % of real-world gestures decoded as the top suggestion, 95 % within the strip
• Word suggestions, next-word prediction and auto-correction that adapts to your touch; backspace right after a correction undoes it
• Multilingual typing: English, German and Russian; several Latin languages at once with automatic language detection
• Learns new words on the device; personal dictionary you can review and edit
• Auto-capitalisation, double-space period, smart punctuation

Gestures & keys

• Slide on the space bar to move the cursor, slide left from backspace to delete whole words, optional trackpad mode
• Long-press for accented letters, digits and symbols; key pop-ups; multitouch rollover; shift chording and caps lock
• Number row, one-handed mode, adjustable height, portrait and landscape
• Layouts for email and URL fields, number/phone/PIN pads
• Terminal keys (Esc, Tab, Ctrl, Alt, arrows) in terminal apps
• Choose apps where the keyboard does not open by itself (e.g. Calculator)
• Long press on the Phosh home bar shows and hides the keyboard

More

• Emoji panel with categories, recents and search (EN/DE/RU keywords), emoji suggestions while typing
• Clipboard history with retention time and pinned items
• Local voice typing with whisper.cpp (optional package)
• Light and dark themes following the system, haptic feedback with adjustable strength via feedbackd
• Settings app (GTK4/libadwaita) in English, German and Russian

Privacy

• No networking code; the keyboard service runs with the network forbidden by the kernel (RestrictAddressFamilies=AF_UNIX AF_NETLINK).
• Nothing you type is logged. Password and PIN fields get no suggestions and are never learned from.
• Learned words, recent emoji and pinned clips stay in your home directory and can be deleted from the settings.
• Voice typing records into memory and transcribes on the phone.

Automated checks prove it: the full end-to-end test suite runs with a socket guard that fails on any network attempt, and again inside an empty network namespace. Details: docs/PRIVACY.md.

Install on FuriOS / Phosh

Download the packages from the latest release on the phone, then:

sudo apt install ./glissando_*_arm64.deb ./glissando-voice_*_arm64.deb   # voice is optional
sudo update-alternatives --set Phosh-OSK /usr/share/glissando/io.github.x_vlad_x.Glissando.desktop
systemctl --user daemon-reload && systemctl --user restart mobi.phosh.OSK.service

Installing does not change your keyboard by itself; the second command does. To go back to Stevia:

sudo update-alternatives --set Phosh-OSK /usr/share/phosh-osk-stevia/mobi.phosh.Stevia.desktop
systemctl --user daemon-reload && systemctl --user restart mobi.phosh.OSK.service

If glissando ever fails to start three times in a row, the system keyboard starts instead, so you can't lock yourself out. Prefer to try it without root? See the trial mode in docs/DEVICE.md.

Building

cargo build --release
cargo test
python3 tools/build-dicts.py        # dictionaries (downloads public word lists once)
packaging/cross/build-arm64.sh      # aarch64 build in a rootless podman container
packaging/debian/build-deb.sh       # .deb packages

End-to-end tests run against a real headless Wayland compositor:

tools/devenv/fetch-sway.sh
dbus-run-session -- python3 tests/e2e/e2e.py
tests/privacy/check.sh

Architecture overview: docs/ARCHITECTURE.md · FuriOS input stack: docs/research/furios.md · Reference behaviour: docs/research/reference-behaviour.md

Contributing

Bug reports, layouts for more languages and translations are very welcome. Layouts are small TOML files in data/layouts.

Acknowledgements

• Word lists: Android Open Source Project (Apache-2.0)
• Word pair statistics: Leipzig Corpora Collection (CC BY 4.0)
• Emoji data and names: Unicode emoji and CLDR (Unicode License v3)
• Glide evaluation data: FUTO swipe dataset (MIT)
• Voice typing: whisper.cpp and the Whisper models (MIT)
• Thanks to the Phosh, Squeekboard and Stevia projects for the input method infrastructure glissando plugs into.

Licence

GPL-3.0-or-later. See LICENSE and the data licences in data/*/ and data/dict/SOURCES.md.

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По-русски

glissando — экранная клавиатура для Phosh (FuriOS и другие), работающая полностью на устройстве: ввод свайпом, подсказки и автоисправление, русская, английская и немецкая раскладки с одновременным вводом на нескольких языках, эмодзи, буфер обмена, локальный голосовой ввод. Никакой сети, телеметрии и учётных записей. Установка — выше, в разделе «Install»; настройки и интерфейс переведены на русский.