Nexus puts your tasks, calendar, notes, studying, money, training, offline knowledge, a personal gallery and local AI models in one workspace on your own computer: encrypted, connected to each other, and working with the network off.
Free and open source
Apache-2.0. Windows 10 and 11 and Linux on x64, and macOS on Apple silicon. Interface in Serbian and English.
Most people run their week across a dozen apps, each with its own account and its own server. In Nexus a task, an exam and an expiring passport share one calendar, one search box and one set of reminders.
A language model that runs on your computer and works through 207 of the app's own tools: it adds and changes tasks, notes, events, money and training, and asks before each change. It answers from your notes, your packs and offline Wikipedia, names its sources, and docks beside any page.
To-dos with priorities, subtasks, recurrence and dependencies, as a list, a board or a calendar. Month, week, day and agenda views, with events you drag and resize.
Notes with folders, tags, backlinks and version history. Private notes are encrypted so only you can read them, with a Recovery Kit of their own.
Exam countdowns, spaced-repetition flashcards, typeset maths and Anki import, plus a planner that books study time before each exam and re-plans when you fall behind.
Accounts, budgets and subscriptions, with every currency kept separate. Habits with forgiving streaks, and reminders weeks before your ID, passport or registration expires.
426 foods with the source of every number, 230 exercises, routines and personal records, and an energy estimate measured from your own weight trend.
Browse art from installed packs, images found in downloaded Reference libraries, and personal pictures kept in encrypted local storage. Search, filter, view full size, edit details and export them with the rest of your archive.
Calculators, thirty-two professional toolkits you opt into, an infinite canvas with live cards, and an electronics bench that writes the Arduino or ROS 2 code your wiring implies.
Translation between 202 languages as you type, by Meta's NLLB-200 model running on your computer. Load it only when needed and eject it to release memory when you finish. Maps cover any country, continent or the whole world at the detail you choose, with place search, pins and distances. Once downloaded, both work with the network off.
Your privacy in Nexus comes from how the code is built, not from a promise in a policy.
Everything lives in one encrypted SQLite database on your computer. An account can use a passcode or explicit device-convenience mode, with a Recovery Kit for recovery. Attachments are encrypted with AES-256-GCM, and Private notes keep a separate credential. Linux does not need a keyring: without a system vault, Nexus uses an owner-only local guard.
Nexus asks once, on first start, whether it may use the network at all. “Offline only” makes no network call of any kind, and CI enforces the boundary; “Offline + update checks” contacts GitHub only to check for and download a new version of Nexus itself; “Downloads” also fetches the content packs, map regions, Wikipedia libraries and models you choose, each from a compiled-in list of hosts. Your notes and data never leave the computer in any mode.
A new account opens with every module visible; you hide or reorder only what you do not use. Personal and business profiles keep their data apart, and several accounts can share one computer.
The interface runs sandboxed and never touches the database. It asks the main process through an allowlist of typed requests, each validated field by field, and every query binds its values.
Export everything into one sealed archive and restore it anywhere, or merge another archive into yours. Encrypted backups can run on a schedule.
Yes. Nexus is free and open source under the Apache License 2.0. It has no ads, no online account and no telemetry.
No. Everything you write works with the network off, and the default is “Offline only”: the app makes no network call at all, which a CI check enforces. You can opt in to update checks, which contact GitHub only for a new version of Nexus, or to downloads, which also fetch the content packs, Wikipedia libraries and models you choose from a short list of hosts. Your notes and data never leave the computer.
Yes. The interface ships in Serbian and English: on first run it follows the system language (Serbian when the system locale is sr*, English otherwise) and remembers the choice, which you can change in Settings. The code and documentation are in English.
Windows 10 and 11 (a per-user installer) and Linux (an AppImage, a tarball and a Gentoo ebuild) on x64, and macOS on Apple silicon (an unsigned dmg). Linux needs no keyring; without a system vault, Nexus uses an owner-only local guard.
Everything is stored in one encrypted database on your computer. An account can use a passcode or explicit device-convenience mode, and a Recovery Kit provides recovery. Attachments are encrypted with AES-256-GCM. Private notes always require their own credential and are encrypted so that only you can read them.
Yes. Nexus exports everything into a single sealed archive that you can restore later, on the same computer or another one, or merge into an existing profile. Encrypted backups can also run on a schedule.
Nexus