MightyDay vs Cairn
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MightyDay
Organize your day with a visual timeline that integrates your calendar, tasks, routines, and habits. Break down complex projects into manageable subtasks and receive timely notifications to stay on track. Capture ideas on the go and visualize your schedule across multiple devices.
- Visual timeline organizer
- Multi-level subtasks
- Task notifications
- Calendar and large views
- Inbox for quick capture
- Recurring tasks
- Task completion tracking
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Transform your day with an elegant visual timeline that combines your calendar, tasks, daily routines, and habit tracking in one place. Over 100,000 users have discovered how to feel more in control, boost their focus, and accomplish more each day. Whether you're managing work projects, studying, traveling, or navigating life with ADHD, MightyDay makes time-blocking effortless. A beautiful, intuitive timeline where you can organize your day and week with simple drag & drop Quick Inbox capture to jot down ideas now and organize them later Seamless sync across iPhone, iPad, Web and Mac—your plans follow you everywhere Project breakdown tools with notes and sub-tasks Productivity boosters like interactive widgets Full personalization with color-coding Key Features: Multi-Level Subtasks: Break down complex tasks into manageable steps with our intuitive multi-level subtask feature. Plan your tasks over several days, weeks, or months, and divide them into smaller, achievable goals. For instance, break a 10-day task into five 2-day subtasks, and further divide each 2-day task into daily subtasks. Task Notifications: Stay on track and never miss a deadline again! Mightyday provides timely notifications for each task, ensuring you're always aware of what needs to be done. Customize the notification settings to fit your preferences and never let an important task slip through the cracks. Calendar View: Get a comprehensive overview of your tasks with the calendar view. Easily visualize your upcoming schedule and plan accordingly. Seamlessly navigate through days, weeks, and months to stay organized and make the most of your time. Large Views: Gain a broader perspective on your tasks with the month and year views. Monitor long-term goals, track progress, and plan ahead effortlessly. Whether it's a project, event, or personal goal, Mightyday's large views keep you well-informed and in control. Task Subtask Hierarchy: Keep your tasks organized and track their progress with ease. Mightyday's intuitive interface displays subtasks within their parent tasks, providing a clear visual representation of your project's structure. Stay focused and accomplish each step efficiently. Inbox Feature: Capture your brilliant ideas and random thoughts on the go with our handy inbox feature. Don't let valuable insights slip away – jot them down quickly and organize them later. The inbox ensures that your ideas are safely stored until you're ready to transform them into actionable tasks. Recurrent Tasks: Tired of setting up the same tasks repeatedly? Mightyday allows you to create recurring tasks effortlessly. Set the frequency, duration, and any necessary reminders, and let the app handle the rest. Never waste time manually recreating repetitive tasks again. Task Completion Tracking: When all subtasks within a parent task are completed, Mightyday automatically marks the parent task as completed.
Cairn
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Cairn is a second brain for every random thought. The idea in the shower. The thing you promised to do. The name of that book. Dump it into Cairn in seconds and let your head go quiet. Cairn keeps it, understands it, and brings it back when it matters. No account. No cloud AI. Your thoughts never leave your iPhone. Use it however your brain works: ideas, plans, reminders, to-dos, things to remember, or the occasional 2am thought. No folders, no formatting, no rules. DUMP IT • Type, dictate or take a photo. Voice is transcribed on your device • Add a reminder that rings like an alarm, or pin the place you were • Home Screen widget, Siri Shortcuts and the Share sheet, so nothing slips away • Your own filters for ideas, plans, a morning to-do, anything FIND IT BY MEANING, NOT EXACT WORDS • Type "trouble sleeping" and find "can't sleep again" • Search by date: "last March", "June 2024", "this week" • Photos are searchable too. Cairn reads the text in them and knows what they show • Search with your voice • Optional: find your thoughts from iPhone Search CAIRN REMEMBERS, SO YOU DON'T HAVE TO • Echoes: write something you thought months ago, and Cairn shows you the first time • Open loops: plans you wrote down and never closed, brought back gently • On this day: what was on your mind a year ago today • One card a day, never more. Tap "Not useful" and you'll see less of it SEE YOUR MIND • List or Sky: every thought is a star, and related thoughts connect on their own • Today: build a cairn, a stone for every day you dump a thought • Your thinking archetype and the themes that keep coming back • A calendar of your days. Go back to any date in one tap • With Apple Intelligence, themes get names and answers read naturally, always from your own words, never made up PRIVATE BY DESIGN • Everything runs on your device: understanding, search, transcription, photo reading • No account, no sign-in, no ads, no tracking. Your thoughts stay on your device, and backups go only to your own iCloud • Face ID app lock • Free encrypted backup to your own iCloud Drive, and an encrypted export you keep • Nothing is ever deleted on a timer FREE, AND CAIRN+ ONCE Capture, search, the Sky, photos, voice, reminders, On this day and backup are free forever. Cairn+ adds Echoes, Open loops, insights and your archetype, your own filters and extra themes. Every new user gets all of Cairn+ free for 14 days, no card, nothing to cancel. After that, Cairn+ is one payment, yours for good. No subscription. Works on iPhone and iPad. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy: https://shreypinnada.github.io/cairn-legal/privacy-policy-ios.html
Screenshots
Verdict
The clearest difference is update cadence: Cairn at every 3 days against MightyDay's every 2 weeks. MightyDay's advantage is device support (4 vs 2) and iOS requirement (15.6 vs 18.0). On price, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. MightyDay sells 3 in-app purchases, starting at $5.99 per month and Cairn sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
MightyDay ships an update every 2 weeks, Cairn every 3 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.
| Parameter | MightyDay | Cairn |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (77 ratings) — better | — |
| Positive reviews | 64.7% of reviews | — |
| Number of ratings | 77 — better | — |
| Update frequency | Every 2 weeks | Every 3 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad |
| Requires iOS | 15.6 — better | 18.0 |
| Further details — not scored | ||
| Size | 101 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | RABBITEYE LAB LLP | Shrey Pinnada |
In-app purchases
MightyDay
- MightyDay Pro - Monthly$5.991 Month
- MightyDay Pro - Yearly7 Days trial$9.991 Year
- MightyDay Pro - Yearly$27.991 Year
Cairn
- Cairn+ Lifetime$14.99









