Best private reminder apps for iPhone (2026)

For most people, the most private reminder app on an iPhone is the one already on it: Apple Reminders with iCloud's Advanced Data Protection turned on, which Apple says makes your reminders end-to-end encrypted, for free. If you want no account and no company in the loop, Due keeps reminders on your phone and syncs only through your own iCloud or Dropbox; if you want one reminder locked behind Face ID while the rest of your notes get help, that is what private notes in Notif, the one I built, are for.

Seven apps follow, judged on the same five things: account, storage and sync, what reaches an AI or the maker's servers, Lock Screen and widgets, and each company's own description of its encryption. I make one of them, so weigh that section accordingly. Prices are as of October 2026.

How I judged them

Every App Store listing I opened says its privacy label comes from the developer and has not been verified by Apple, so what follows comes from each company's own privacy, security and support pages, quoted. Where they don't answer, I say so.

Apple Reminders

The baseline. Apple's iCloud guide for Reminders says reminders are stored in iCloud and appear on every device signed in to the same Apple Account; you can also add Exchange or CalDAV accounts.

The question is who holds the keys. Apple's iCloud data security overview says that under standard data protection your data is encrypted in transit and at rest, but the keys are stored in Apple data centers so Apple can decrypt it when you need it. Reminders is not one of the fifteen categories end-to-end encrypted by default.

Turn on Advanced Data Protection and Reminders joins that list; Apple's wording is "No one else can access your end-to-end encrypted data, not even Apple." Three catches from the same pages: reminders synced using CalDAV don't support end-to-end encryption, and Contacts and Calendars never do, so a calendar alert is never covered; you must set up a recovery contact or recovery key first, because Apple doesn't have the keys to help you recover the data; and every device on the account must run software that supports it, iOS 16.2 or later on iPhone. Apple's Reminders listing mentions Apple Intelligence suggestions, and Apple's Apple Intelligence and privacy page says data processed in Private Cloud Compute is not stored or made accessible to Apple.

Notif

Notif is the reminders app I built for iPhone (iOS 18 or later), iPad (iPadOS 18 or later) and iPhone Duo. Notif has no accounts, no analytics, no advertising, and no cross-app tracking. Every note is a real reminder in Apple Reminders, in Notif's own list, and every note gets an Insight, one line of help, and a button. Your note's button opens the app you already use, like Uber Eats, Uber or Kindle, and remembers your pick.

A private note is never sent to Notif's server or to any AI. A private note stays inside Notif. Marking it private takes it out of Apple Reminders, and it is never written there again. Opening a private note asks for Face ID, Touch ID or your passcode. Private notes are encrypted on your iPhone with AES-256, opened with Face ID. Private notes come with you through iCloud Keychain. Keep it on in Settings, or a new iPhone can't open them. Like the rest of Notif's data on your iPhone, a private note is part of your own iPhone backup.

Only the notes you mark private are private. A note you haven't marked private can be sent, one at a time, to Notif's server and an AI provider to write its Insight; the privacy policy says "Notif's server does not store your note content, and Notif's logs never contain note text," and notes that look sensitive, like passwords or PINs, never get an Insight on their own.

Notif is free with an Insight a day. Notif Pro is an Insight on every note, smarter Action Buttons and private notes, at $4.99 a month or $39.99 a year, cancel any time. Marking a note private is part of Notif Pro.

Things 3

Things is a to-do app for Apple devices from Cultured Code. Its Getting Things page says Things 3 is a one-time purchase for each platform, sold separately for Mac, iPad, iPhone and Vision; the iPhone app is $9.99 on the App Store. You don't need an account on one device: the syncing page says you can skip Things Cloud if you only use Things on a single device, while syncing to other devices needs the free account. Synced to-dos live on Things Cloud, hosted on Amazon Web Services in the USA per the company's subcontractor list; the syncing page says all data is encrypted at rest on the server with 256-bit AES, and in transit. Nothing on its pages describes an AI feature, and the privacy policy says you can request deletion of your account and content from the settings in any app.

Todoist and TickTick

Todoist is a cross-platform task manager from Doist, built around an account on its servers. Its security page says "We use Amazon Web Services (AWS) servers to host all user data," that tasks are stored and encrypted at rest, and that data in transit uses TLS 1.2 and 1.3; it does not mention end-to-end encryption. The privacy policy says your information is processed in the U.S., that Todoist may disclose information to vendors that provide artificial intelligence services, and that it doesn't use your information to train generalized AI models. There is a free Beginner plan; Pro is $7 a month or $60 a year, per Todoist's pricing FAQ.

TickTick, from Appest Limited, reads much the same. Its privacy policy says "SSL protocol secures all data and information transmitted with Service," and nothing about stored data or where its servers are. On AI: "we utilize third-party AI service providers to process your inputs," but only after you start an AI task. Premium is US$49.99 a year on its upgrade page.

Due

Due is a reminders app in the strict sense, and the plainest privacy story here. Its privacy policy, version 2026.1: "Your reminders and timers stay on your device. We do not have a copy and cannot read them." Sync is through your own iCloud or Dropbox, and "Due does not hold the credentials to it." There is no Due account, and the app sends nothing to any AI model provider. Two things to know: usage statistics (a device identifier and which features you use, never reminder content) go to Due's server in Germany and to Amplitude unless you turn them off in Settings; and Due adds no encryption of its own to the synced copy, so it is as safe as your iCloud or Dropbox account. Due is $7.99 once on the App Store, plus an optional Upgrade Pass at $4.99 a year.

Lunatask

Lunatask is an encrypted to-do list, habit tracker, journal and notes app for Windows, Mac, Linux, iPhone and Android, and the only app here that says the maker cannot read your tasks. Its encryption page says the information in your tasks, notes and journal is end-to-end encrypted with keys derived from a master password you choose: "We don't have access to the private key required to decrypt your data." Its servers are in Virginia, and its privacy policy names no AI feature. The fine print matters for reminders: a task's status, priority and assigned dates are stored unencrypted, so the server can see when, not what; if you forget your password, "the only option is to reset your account," and your data is lost; and reminders on the phone come from time-blocking, per its notifications page, with task names shown since version 2.36.0 (release notes). Lunatask is free; Premium is $6 a month paid annually on its site, or $8 a month and $72 a year in the App Store.

Lock Screen and widgets

The iPhone controls most of what a phone face up on a desk gives away. Apple's notification settings page lets you set Show Previews to Always, When Unlocked or Never, for all apps or one, and its Lock Screen page covers turning widgets off under Allow Access When Locked. Every app here offers a Lock Screen or Home Screen widget except Lunatask, whose listing doesn't mention one. In Notif, three things are the app's own doing. Private notes never show up on your widgets. A private note's alerts never show its words on your Lock Screen. Private notes never show up in iPhone search. The step-by-step for the rest is in private reminders on iPhone.

Who should pick which

• The least change: Apple Reminders with Advanced Data Protection. Free, already on your phone, end-to-end encrypted in Apple's words. Set up the recovery key first
• Reminders in a Google or Exchange account: Advanced Data Protection won't cover them; move them to iCloud or keep them on the device
• No account, no company in the loop: Due, for $7.99 once. Turn off usage statistics if you'd rather send nothing
• Most notes helped, a few under Face ID: Notif. Private notes are part of Pro
• Windows or Android too, and a maker who can't read your tasks: Lunatask, if you accept unencrypted dates, reminders by time-blocking and no password recovery
• Projects shared with other people: Todoist or TickTick, with everything on their servers and AI features that use outside providers
• Apple-only, one-time purchase, one device: Things 3 without Things Cloud

The verdict

If private means nobody but you can read the reminder, two apps here say so in their own words: Apple Reminders with Advanced Data Protection, and Lunatask. Apple's is the better pick for almost everyone; Lunatask if you need Windows or Android. Neither is Notif, and I'd rather say so than pretend otherwise. If private means no account and nothing of yours on the maker's server, Due is the better pick, with Things 3 on a single device close behind.

Notif is for someone who wants help on everyday notes and a private note, locked behind Face ID, for the few that need it. If every note you write needs to be private, buy Due or turn on Advanced Data Protection instead; Notif's private switch is per note, and it is part of Pro.

More: Notif vs Apple Reminders, Notif vs Things 3 and Notif vs Todoist. Notif is free on the App Store: get Notif.

Questions

Is Apple Reminders private?

With iCloud's standard protection, Apple encrypts your reminders but keeps the keys, so Apple can decrypt them. With Advanced Data Protection turned on, Apple says Reminders becomes end-to-end encrypted, except for reminders synced through a CalDAV account such as Google or Exchange

Which reminder apps work without creating an account?

Due, Notif, and Things on a single device run without an account with the app's maker. Apple Reminders uses your Apple Account for iCloud sync, and Todoist, TickTick and Lunatask ask you to register before you can use them

Which reminder apps send my reminders to an AI?

Todoist and TickTick both say they use third-party AI providers for their AI features, and TickTick says that happens only after you start an AI task. In Notif, a note that is not marked private can be sent, one at a time, to Notif's server and an AI provider for its Insight; a private note never is. Apple, Due, Things and Lunatask describe no AI feature that reads your reminders

Which app keeps a reminder off the Lock Screen?

On any app, the iPhone's Show Previews setting decides whether a notification's words appear before you unlock, and Allow Access When Locked turns Lock Screen widgets off. Notif goes further for private notes only: a private note's alerts never show its words on your Lock Screen, and private notes never show up on your widgets

Is Notif encrypted?

Only the notes you mark private. Private notes are encrypted on your iPhone with AES-256, opened with Face ID, and a private note is never sent to Notif's server or to any AI. Every other note is a real reminder in Apple Reminders, in Notif's own list, and follows your iCloud settings

What happens to encrypted reminders if I forget my password?

Lunatask says the only option is to reset your account, and your existing data is lost. Apple says it does not have the keys to recover end-to-end encrypted data for you, which is why Advanced Data Protection makes you set up a recovery contact or recovery key first. Notif's private notes come with you through iCloud Keychain; keep it on in Settings, or a new iPhone can't open them