Your day's tasks, one corner away.
Move your mouse to the bottom-left corner of your screen — or press ⌥Space —
and your to-do list slides out on top of whatever you're doing,
without stealing focus. No Dock icon, no window to manage, no phone to pick up.
⬇︎ Download for macOS · Install guide · What it does · FAQ
Corner is a small macOS app for the tasks you keep forgetting: the ones you'd normally text yourself, or unlock your phone to write down. It lives in the corner of your screen and appears with a gesture, so writing something down costs you two seconds and never interrupts what you were doing.
- A gesture, not an app to open — dwell in the bottom-left corner for a quarter second and the panel slides out. Over fullscreen apps too. It never takes focus away from what you're working on.
- Or never touch the mouse — ⌥Space opens the panel; ⇧⌥Space opens quick capture, a floating field to drop a task into today and get back to work. No accessibility permissions required.
- Today and Week — a simple list for today, Monday-to-Sunday for planning ahead. Move a task to another day from its right-click menu.
- Nothing falls through — unfinished tasks roll over to today at midnight, marked with a small amber clock so you know they've been waiting.
- Categories with colors — one per task, with filter chips that remember your last selection.
- Subtasks — one-level checklists. Check the last step and the parent completes itself; check the parent and every step follows.
- Reminders at a time — right-click a task → Remind me → and it tells you.
- Your menu bar knows — pending count and your next task, always visible. Complete it from the menu without opening anything.
- On your iPhone, without an iPhone app — turn on Reminders sync and your tasks mirror into Apple Reminders, reaching your iPhone, Watch and Siri through your own iCloud. Each category becomes its own list; move a reminder between lists on your phone and the category follows.
- Bilingual — English and Spanish, following your system language.
- Private by design — no accounts, no telemetry, no background network. Your tasks live in a local file on your Mac and nowhere else. See PRIVACY.md.
Requirements: macOS 14 (Sonoma) or later. Every push is built and tested on macOS 14 and 15; day-to-day development happens on macOS 26.
Option 1 — Download (easiest)
- ⬇︎ Download Corner.app.zip and unzip it.
- Drag Corner.app into your Applications folder.
- First launch only: right-click the app → Open → Open. (macOS shows a warning because releases aren't notarized yet — see the FAQ. After this once, it opens normally forever.)
- The panel opens by itself to say hello. From the menu bar icon you can turn on Launch at login so it's always there.
Option 2 — Homebrew
brew tap andreetorres/corner
brew trust andreetorres/corner
brew install --cask corner(Homebrew asks you to explicitly trust casks from third-party taps — that's
the brew trust line.)
Option 3 — Build it yourself — see Building from source.
| Do this | To get |
|---|---|
| Move the mouse to the bottom-left corner | The panel |
| Type in Add task… and press Enter | Your first task |
| Right-click a task | Move it to another day, set a reminder, give it a category, add subtasks |
| Press ⇧⌥Space anywhere | Quick capture, without opening the panel |
| Menu bar icon → Sync with Reminders | Your tasks on your iPhone |
macOS says the app is from an unidentified developer. Is it safe? Yes — the warning means the release isn't notarized, which requires a paid Apple Developer account. Right-click → Open the first time and macOS remembers. Corner is fully open source: you can read every line here, or build it yourself instead of trusting the download.
I already use the bottom-left corner for a macOS Hot Corner. Both will trigger. Either remove the system one in System Settings → Desktop & Dock → Hot Corners, or just use ⌥Space instead.
⌥Space conflicts with another app. Shortcuts are fixed in this version. Configurable shortcuts are on the roadmap — open an issue if this blocks you.
How does Reminders sync work, and is it private?
It's off until you turn it on, and only then does Corner ask macOS for
permission. It manages its own lists (Corner, and Corner — <category>) and
touches nothing else in your Reminders. Your tasks travel to your devices
through your iCloud — nothing is ever sent to us. Subtasks and category
colors stay local. Details in PRIVACY.md.
Where is my data, and how do I back it up?
In ~/Library/Application Support/Corner/, a local database. Time Machine
covers it automatically. Deleting the app does not delete your tasks.
Why does a task from yesterday appear in today's list? Because it wasn't done — unfinished tasks roll over at midnight. The small amber clock marks them. It's a feature, not a bug.
Does it work on multiple monitors? Yes. The corner that responds is the one on the screen where your cursor is.
Requirements: Xcode 16+, XcodeGen
(brew install xcodegen).
git clone https://github.com/AndreeTorres/corner.git
cd corner
xcodegen generate
xcodebuild -scheme Corner test # domain test suite
xcodebuild -scheme Corner -configuration Release buildThe full developer guide — tech stack and the reasoning behind it, reproducible
releases, visual verification tooling, troubleshooting — is in
docs/DEVELOPMENT.md.
Three layers with one-way dependencies: Domain (pure Swift + SwiftData,
fully unit-tested), UI (SwiftUI, views with no persistence of their own),
and System (AppKit: the hot corner monitor, a non-activating NSPanel, the
menu bar, Carbon hotkeys, EventKit sync). No third-party dependencies —
everything is Apple frameworks.
| Document | What's in it |
|---|---|
docs/SPEC.md |
What the app does: behavior, states, edge cases |
docs/ARCHITECTURE.md |
How it's built: layers, data model, dependency rules |
docs/DECISIONS.md |
Every closed decision, dated, with its reasoning |
docs/DEVELOPMENT.md |
Setup, workflow, releases, troubleshooting |
CHANGELOG.md |
What changed in each release |
Project documentation is written in Spanish, the project's working language. Translations are welcome.
Issues and pull requests are welcome — see CONTRIBUTING.md
and our Code of Conduct. The short version: behavior
changes start with a docs/SPEC.md edit, the domain layer keeps its tests
green, and features go through a branch and a PR so CI validates them first.
Found a security issue? Please report it privately — see SECURITY.md.
MIT © 2026 Andree Torres
Designed and directed by Andree Torres;
AI-assisted development. Every product, architecture and quality decision is
documented and dated in docs/DECISIONS.md.
Corner es una app de macOS para las tareas que se te olvidan: esas que acabas mandándote por mensaje o anotando en el teléfono. Vive en la esquina de tu pantalla y aparece con un gesto, así anotar algo te cuesta dos segundos y no interrumpe lo que estabas haciendo.
Instalación: descarga Corner.app.zip,
descomprímelo, arrástralo a Aplicaciones y la primera vez ábrelo con clic
derecho → Abrir (los releases aún no están notarizados). También con Homebrew:
brew tap andreetorres/corner && brew trust andreetorres/corner && brew install --cask corner.
Requiere macOS 14 o superior.
Qué hace: gesto en la esquina inferior izquierda (o ⌥Espacio) para abrir el panel; ⇧⌥Espacio para captura rápida sin abrir nada; vistas Hoy y Semana; mover tareas a otro día; arrastre automático de pendientes a medianoche; categorías con color y filtros; subtareas con completado bidireccional; recordatorios con hora; siguiente tarea visible en la barra de menú; y sincronización opcional con Recordatorios de Apple para tener tus tareas en el iPhone, el Watch y Siri vía tu propio iCloud.
Privacidad: sin cuentas, sin telemetría, sin red en segundo plano. Tus tareas viven solo en tu Mac. Detalles en PRIVACY.md.
Documentación (en español): docs/SPEC.md qué hace ·
docs/ARCHITECTURE.md cómo está construida ·
docs/DECISIONS.md las decisiones y su porqué ·
docs/DEVELOPMENT.md cómo trabajarla.