Which To-Do List Apps Are Safe? The Best Privacy-Focused Options in 2026

Intro

A to-do list app stores more than just tasks. It may hold your daily routines, project deadlines, shopping lists, and even personal notes. If that data falls into the wrong hands—or gets sold to advertisers—it can reveal a lot about your life. Wirecutter’s 2026 guide to the three best to-do list apps focuses on features and usability, not data privacy. So it’s worth asking: how well do those top picks protect your information?

What Happened

Wirecutter’s guide to the 3 best to-do list apps of 2026 | Reviews by Wirecutter - The New York Times evaluates apps like Todoist, TickTick, and Microsoft To Do for their functionality, cross‑platform support, and reliability. But a privacy check of these same apps reveals a mixed picture.

  • Todoist uses encryption in transit (TLS) but not end‑to‑end encryption. Its privacy policy states that it collects account details, task content, and usage data for service improvement. It does not sell personal data, but it does share anonymised analytics with third parties.

  • TickTick goes further: it offers optional end‑to‑end encryption for notes and tasks (though it’s off by default). The free tier includes ads based on usage patterns, and the company has acknowledged collecting device identifiers and location data.

  • Microsoft To Do is integrated with the Microsoft ecosystem. Like most Microsoft services, it uses TLS encryption and offers no end‑to‑end encryption for task content. Data may be processed for “personalised experiences,” including advertising if you use a free Microsoft account. Enterprise accounts have stronger controls.

Wirecutter did not rank these apps on privacy, which is understandable for a productivity review. But for anyone handling sensitive information—work passwords, medical appointments, or financial reminders—privacy matters.

Why It Matters

Data breaches affecting productivity apps are not hypothetical. In recent years, services like Todoist have experienced credential‑stuffing attacks, and Microsoft has had its share of cloud misconfigurations. Even if your tasks seem harmless, consider that a list like “passport renewal,” “bank transfer,” or “doctor’s appointment” could be valuable to scammers or identity thieves.

Moreover, many free to‑do apps monetise by collecting and analysing your data. The more an app knows about your routine, the better it can target ads—or sell that profile to data brokers. A 2025 study by Consumer Reports found that several popular productivity apps shared user data with at least four third‑party trackers.

End‑to‑end encryption remains rare in this category. That means the service provider (and any attacker who compromises its servers) can read your task content in plain text.

What Readers Can Do

You don’t have to abandon your favourite to‑do app, but you can take steps to reduce privacy risks.

  1. Check the privacy policy. Look for explicit statements about data collection, third‑party sharing, and encryption. If an app says it may share data “with affiliates” or “for business purposes,” treat that as a red flag.

  2. Enable end‑to‑end encryption if available. TickTick offers it in the paid version. Todoist and Microsoft To Do do not, but you can use a separate encrypted notes app for truly sensitive items.

  3. Limit app permissions. On your phone, revoke unnecessary permissions like contacts, calendar, and location. A task manager doesn’t need your exact location to show a grocery list.

  4. Use a strong, unique password and enable multi‑factor authentication. Many breaches happen because users reuse passwords.

  5. Consider a privacy‑focused alternative. Apps like Standard Notes or Tusk (for Todoist) offer encrypted options. Or stick with a simple plain‑text system for tasks you don’t want to share.

  6. Review third‑party logins. If you sign up via Google or Apple, the app may receive additional profile data. Use an email address and password instead, or at least check what data is being shared.

Sources

  • Wirecutter, “The 3 Best To‑Do List Apps of 2026,” The New York Times (December 2025)
  • Privacy policies of Todoist, TickTick, and Microsoft To Do (accessed April 2026)
  • Consumer Reports, “Productivity Apps and Data Sharing,” 2025
  • Electronic Frontier Foundation, “Security and Encryption in Common Apps,” 2026