Remember The Milk is the smart to-do app for busy people.
Application for the web, Mac, Windows, Linux, Apple Watch, iPhone, iPad, Android phones & tablets, BlackBerry 10, and Fire.

How it work?

- Enter your task's properties in one line, including due date, priority, repeat, tags, and more.
- Get reminded by email, text, IM, Twitter, and mobile apps (Android, iOS, BlackBerry 10).
- Organize the way you want to. Create as many lists as you need. Make your lists both organized and colorful with tags.
- Subtasks break your tasks down into smaller, more manageable pieces.
- Share your lists and give tasks to others to get things done faster.
- Attach files to your tasks. Connect to Google Drive or Dropbox to keep documents, spreadsheets, presentations, photos, and files handily alongside the related tasks.

Integrations

This to-do app is even better when you connect it with your favorite apps and tools.
Add and manage your tasks from Gmail, Google Calendar, Twitter, Evernote, IFTTT, MS Outlook.

Pricing

There are two pricing plans - Basic & Pro.
Basic is free and offers:
- Web, desktop, and mobile apps.
- Seamless sync between your computers and devices.
- Integration with Gmail, Google Calendar, and Evernote.
- Add tasks with email, Alexa, Siri, and Twitter.
- Give tasks to others.
- Reminders via email, text, IM, and Twitter.
- Reminders via mobile apps (Android, iOS, BlackBerry 10).
- Share lists with up to 2 others.
- Archive of completed tasks last 7 days.

The costs of the Pro Plan are $39.99 per year and offers:
- Everything from the Basic plan.
- Reminders via mobile apps (Android, iOS, BlsackBerry 10).
- Unlimited share lists.
- Advanced sharing permissions.
- Subtasks.
- Advanced sorting and grouping.
- Choose from 100+ themes (web & desktop apps).
- Customizable tag colors.
- Attachments with Dropbox and Google Drive.
- Work offline in the web app.
- Badges and widgets for the mobile apps.
- Create shortcuts with the Shortcuts app (iOS).
- Apple Watch app.
- Sync with Microsoft Outlook.
- Integration with IFTTT & Zapier.
- Early access tester program.
- Priority support.
- Archive of completed tasks.