1Byte Systems

Independent software studio

Software done right. No ads. No tracking.

1Byte Systems is an independent software studio that designs and builds fast, polished apps and games for Android — with programs for Linux and Windows on the way — that respect the people who use them: no ads, no analytics, no accounts — and every one of them in 21 languages.

  • No ads, ever
  • No tracking, no accounts
  • 21 languages
  • Phone, tablet and foldable
Explore the catalogue Become a tester
Apps and games for Android · programs for Linux and Windows on the way

Different products. One set of rules.

Apps for every day, games to unwind (or not) and, on the way, programs for your desktop. Each one has its own personality; none of them has ads or tracking.

Apps

Everyday tools, done properly.

All apps

  • 1B Files

    File manager for Android

    All your files. None of the junk.

    File manager with smart cleanup, remote servers (SFTP, SMB, WebDAV) and a secure folder.

    • 7 kinds of cleanup
    • SFTP · FTP · SMB · WebDAV
    • Access from your PC
    New · 0.3Early accessDiscover

  • 1B Terminal

    SSH client for Android

    Type less. Say the command.

    SSH client with tabs, Ed25519 keys, snippets, a touch-friendly key bar and voice dictation.

    • Dictate commands
    • Ed25519 & RSA keys
    • Tabs & snippets
    Early accessDiscover

  • 1B Docs

    Office suite and PDF for Android

    Your whole office. Zero ads.

    Office suite and PDF reader: open, edit and create DOCX, XLSX and PPTX, annotate and sign PDFs.

    • DOCX · XLSX · PPTX · PDF
    • No Internet permission
    • 325 spreadsheet functions
    Early accessDiscover

  • 1B Pass

    Password manager for Android

    Your passwords. Never online.

    Offline password manager with autofill, two-step codes, a password health check and an emergency recovery kit.

    • No Internet permission
    • AES-256-GCM + Argon2id
    • Autofill
    Early accessDiscover

  • 1B Music

    Music player for Android

    Every song. The right cover.

    Music player that finds the right covers, tags and lyrics — for your files and your own Navidrome, Jellyfin or Plex server.

    • 98.8% right covers
    • Recognises songs by ear
    • Gapless & lossless
    Coming soonDiscover

  • 1B Recorder

    Voice recorder with on-device transcription

    Every word on record. None of it online.

    Voice recorder that transcribes in 21 languages, separates speakers and summarizes on your phone — with no Internet permission at all.

    • No Internet permission
    • 21 languages, no minute limits
    • Speakers and summary
    Coming soonDiscover

  • 1B Weather

    Weather forecast and widgets

    The sky right now. The day in one sentence.

    Clear forecast with the day in one sentence, 10 days with honest confidence and five widgets that never pretend old data is new.

    • No ads, no tracking
    • Widgets that don't go stale
    • 10 days, honest confidence
    Coming soonDiscover

  • 1B Cut

    Edit & Effects · desktop

    One program instead of two. Editing and effects, together.

    A desktop video editor where the edit and the effects live in one project: double-click a clip to open its composition, and bring your own AI — or the local one that comes included.

    • Linux first · then macOS and Windows
    • Editing + effects in one program
    • The AI you choose
    Coming soonDiscover

Games

Relaxing puzzles and one very noisy shooter.

All games

  • 1B Mahjong

    Mahjong solitaire for Android

    Match the tiles. Watch them turn to light.

    Relaxing mahjong solitaire with premium tiles, animated landscapes, bosses to beat and big, easy-to-read tiles.

    • All-new premium look
    • A boss every 10 levels
    • Boards that never repeat
    New · 1.1Early accessDiscover

  • 1B Rotate

    3D ring puzzle for Android

    Spin it. Shatter it. Now in 3D.

    A brainy ring puzzle, now in 3D: spin glossy rings, pop the golden clamps and take on a boss every 10 levels.

    • All-new 3D look
    • A boss every 10 levels
    • Puzzles that never repeat
    New · 1.1Early accessDiscover

  • 1B Fold

    Puzzle game for Android

    Fold the paper. Make it one.

    An original puzzle: fold a sheet of numbered tiles so equal numbers land on each other and merge.

    • An original puzzle
    • Journey · Endless · Daily Fold
    • 12 origami to collect
    New · 1.1Early accessDiscover

  • 1B Zombie Hunter

    First-person shooter for Android

    The night is long. Bring a flashlight.

    First-person zombie shooter with hordes, monsters and a boss at the end of every level — on our own 3D engine.

    • 10 maps · 30 missions
    • 6 bosses
    • 11 weapons
    Early access18+Discover

Desktop: coming soon

1B Mail and 1B Note are on their way to Linux and Windows, along with native versions of 1B Note for GNOME and KDE Plasma.

Linux Windows

  • 1B Mail

    Email for Windows, Linux and Android

    Every account in one inbox. Nobody's cloud.

    An email program that looks and works like Outlook and talks straight to your own mail servers: real conversations across folders, one unified inbox with Focused and Other, fast local search, and remote images and trackers blocked. It imports your accounts from Thunderbird and classic Outlook. Early access 0.1. An Android version is on the way too.

    • Any IMAP account: IONOS, Gmail…
    • Imports Thunderbird and Outlook
    • Trackers blocked
    • WindowsMicrosoft Store
    • LinuxRPM · Flatpak
    Early access 0.1Coming soonDiscover

  • 1B Note

    Encrypted workspace for Windows and Linux

    Pages, databases and teams. Encrypted end to end.

    A Notion-style notebook: nested pages built from blocks, databases with table, board, list, calendar, gallery and timeline views, and team spaces with invitations. Sync is end-to-end encrypted, so the server stores your pages without being able to read them. On the desktop it adds keyboard shortcuts, a tray icon and system notifications.

    • End-to-end encrypted sync
    • Block editor with a / menu
    • Six database views
    • WindowsMSI
    • LinuxRPM
    Early access 0.7Coming soonDiscover

  • 1B Cerula

    1B Note for GNOME

    Your notes, at home in GNOME.

    A native GNOME app built with GTK 4 and libadwaita: notebooks, tags, shortcuts and reminders in an adaptive window that goes from three panes to one on narrow screens. The editor handles checklists, tables, images and code blocks with syntax highlighting; you can search your notes from GNOME Shell and print them or save them as PDF. Written in Rust, on the same encrypted core as 1B Note.

    • GTK 4 and libadwaita
    • Written in Rust
    • Search from GNOME Shell
    • LinuxRPM
    In development · 0.1Discover

  • 1B Tabella

    1B Note for KDE Plasma

    Your notes, at home in Plasma.

    A native KDE Plasma app built with Kirigami and KDE Frameworks: notebooks, tags, shortcuts and reminders with Plasma notifications, a tray icon and search from KRunner. The editor handles checklists, tables, images and code blocks, and notes print or export to PDF with selectable text. Written in Rust and Qt, on the same encrypted core as 1B Note.

    • Kirigami and KDE Frameworks 6
    • Rust and Qt 6
    • Search from KRunner
    • LinuxRPM
    In development · 0.1Discover

Promises you can check

Every 1B app and game is built on the same four rules, with no exceptions and no fine print. And the numbers back them up.

  • No ads, ever

    No banners, no interstitials, no “watch a video to continue”. Our games have no in-app purchases either.

  • No tracking

    No analytics, no tracking SDKs, no accounts. What you do in our apps is none of our business.

  • Offline-first

    Your files, documents and progress stay on your device. Most of our apps don't even request Internet access.

  • Every screen

    Designed for phones, tablets and foldables, in light and dark — with layouts that adapt when you unfold.

  • 0ads: no banners, no “watch a video to continue”
  • 0trackers, analytics or tracking SDKs
  • 0accounts to create with us
  • 0in-app purchases in our games
  • 7 of 11Android apps and games don't even have permission to use the Internet
  • 21languages, in every app and on this website

Try them before everyone else

All our apps are in closed testing on Google Play. Testers get every update first — and their feedback shapes what we build next.

  1. 1

    Write to us

    Email us the Google account you use on Google Play and tell us which apps you want to try.

  2. 2

    We add you

    We add you to the tester list — usually within a day.

  3. 3

    Join and install

    Open the test link on your Android device, tap “Become a tester”, then install from Google Play.

Request an invite How testing works

Need something built?

Besides our own products, we build custom Android and web apps and set up AI agent workflows for businesses.

About us