Comparison

Supernotes vs HEY Calendar

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Supernotes

Organize your thoughts and ideas with a fast, lightweight note-taking app. Create visually rich notecards with Markdown and LaTeX support, enhanced by AI writing assistance. Build interconnected knowledge networks and share them seamlessly.

Highlights
  • Shareable Markdown notecards
  • AI writing assistance
  • Bi-directional card linking
  • 2D/3D graph visualization
  • Spaced repetition flashcards
  • Real-time collaboration
  • Offline support
Features
Read full description

Free your thoughts with Supernotes, the fast, lightweight notes app. Write beautiful notecards that are perfect for personal, work, and educational use – all your ideas, meeting, and lecture notes at your fingertips. CREATE NOTECARDS THAT POP Tired of scrolling up and down long notes? Break down your ideas with Supernotes notecards – keeping you organized. Add colors, tasks, bold, italics, lists, equations, images, code snippets, and more. Want more? Connect a bluetooth keyboard, and harness the full extent of our Markdown and LaTeX editor. POWER UP WITH AI Try our thoughtful approach to AI. We call them Superpowers that help automate arduous tasks, such as tagging your cards, as well as train you to become a better writer, highlighting grammatical errors and offering rewording suggestions. ORGANIZE YOUR KNOWLEDGE Categorize your notecards using tags, reference popular cards with card links, and pop related notecards inside a parent card to build a network of interconnected knowledge. Multi-select, and edit notes in bulk, in the Table layout. Visualize your notes in both 2D and 3D graph layouts, helping you discover existing and new connections. Build your dream Zettelkasten system. REMEMBER WHERE YOU WROTE THEM Only on Supernotes, view all your notecards on a geographic Map. Opt-in to location sharing to automatically assign locations to notes when you create them to see where you had the most inspiring ideas or the most meetings! Or manually assign locations for trips, restaurant recommendations and more. BUILT-IN SPACED REPETITION Jump into Flashcard layout to instantly learn any of your notecards. Using our FSRS algorithm, cram your notes before an exam or learn them at a relaxed pace. We will show which notecards are due at the right times so you can learn as efficiently as possible. SHARE WITH FRIENDS Stop taking screenshots of notes – just share a notecard to generate a secure link. That note will be instantly accessible to anyone (even if they don't have Supernotes)! Add friends, classmates, or teammates on Supernotes to instantly share new notecards with each other, and see each other's cursors editing in real time. ON ALL YOUR DEVICES, OFFLINE OR ONLINE Pick up where you left off with our iPhone, iPad, and Mac apps. Keep taking notes wherever you are, even if your connection drops, with seamless offline support. FEATURE COMPLETE - Universal Search & Filters - Markdown / LaTeX Editor - Bi-directional Card Links - Calendar Heatmap - Assign Dates to Notes - Four Day & Night Themes - Share to Supernotes Extension - Export to Markdown, JSON & PNG - Keyboard Shortcuts - 24/7 Customer Support FREE FOR LIGHTWEIGHT USE Discover everything Supernotes has to offer with our generous free Starter plan; explore all the features and earn 100s cards. Or upgrade to the Unlimited plan for unlimited cards, feature previews, and more. Prices may differ depending on your location, and subscriptions will be charged to your App Store payment method. Your subscription will automatically renew and you may cancel at any time. Privacy Policy: https://supernotes.app/privacy Terms & Conditions: https://supernotes.app/terms

About

HEY Calendar

This calendar app organizes your schedule around days and weeks, reflecting how people naturally think. It supports habits, highlights important events, and accommodates flexible scheduling for tasks that don't have a fixed time. Enjoy a full-featured experience with unique twists on conventional calendar functions.

Highlights
  • Weekly view focus
  • Habit tracking
  • Event highlighting
  • Flexible scheduling for 'maybe' tasks
  • Event countdowns
  • Day labels for context
  • Color-coded sub-calendars
  • Flexible reminders
Read full description

Make your day. The all-new HEY Calendar puts time on your side. Week after week, not month after month People think in days and weeks, not months. What’s tomorrow? Later this week? Next week? The HEY Calendar is built around how you think, not how paper calendars were designed. Habits and highlights Establish a habit, stick with it. Circle important events so they stand out. Fill your days with memories or moments — not just events. “Sometime this week” mimics real life Need to get an oil change? Get some cash from the ATM? Write a thank you note? Maybe this week or next, just not exactly sure when you’ll have a chance? HEY knows “maybe” is a real thing. And plenty more The HEY Calendar is a full-featured calendar with many original twists on common — and not so common — conventions. Soon you’ll wonder why all calendars don’t work like this. - Set countdowns for anticipated events - Use Day Labels to add context to days - Set up color-coded sub-calendars - Flexible reminders so you don’t miss out

Screenshots

Supernotes4 screens
HEY Calendar4 screens

Verdict

The call

The clearest difference is in-app purchases: HEY Calendar at none against Supernotes's 3. HEY Calendar also leads on ratings volume (655 vs 122). Supernotes's advantage is review sentiment (91% vs 56%) and iOS requirement (15.0 vs 17.2). On price, rating, update cadence and ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Supernotes sells 3 in-app purchases, starting at $11.00 per month. HEY Calendar asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.8 for Supernotes against 4.7 for HEY Calendar. That said, the two scores are not equally well evidenced: HEY Calendar has 655 ratings behind it against 122, so its average is the more settled of the two. Written reviews are what separate them: 91% of Supernotes's written reviews are positive against 56% of HEY Calendar's.

UpkeepUpdate frequency

Supernotes ships an update monthly, HEY Calendar fortnightly. The most recent releases landed on October 18, 2026 and October 19, 2026 respectively.

Scorecard5 real differences · 5 level
Supernotes versus HEY Calendar: the parameters behind the verdict, then further details
ParameterSupernotesHEY Calendar
PriceFreeFree
Rating4.8 (122 ratings) — better4.7 (655 ratings)
Positive reviews91.2% of reviews — better56.4% of reviews
Number of ratings122655 — better
Update frequencyMonthlyFortnightly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemiumFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.2
Further details — not scored
Size106 MB64 MB
Age rating4+4+
DeveloperSupernotes37Signals LLC

Customer experience

Supernotes

All ratings122 ratings
Positive95.9%
Neutral0.8%
Negative3.3%
Written reviews57 reviews
Positive91.2%
Neutral1.8%
Negative7.0%

HEY Calendar

All ratings655 ratings
Positive90.1%
Neutral5.3%
Negative4.6%
Written reviews110 reviews
Positive56.4%
Neutral15.5%
Negative28.2%

User reviews

Supernotes

From 122 App Store ratings

What we love

  • ✨ Beautiful design and UI
  • 🚀 Fast and efficient
  • 👍 Easy to use and intuitive
  • 🧠 Powerful organization system
  • 💡 Unique card-based concept

Room to improve

  • 🤔 Learning curve for some
  • ⚠️ Limited initial note space
  • 🎛️ Lacks advanced features for some users
  • 📱 No iOS widgets
  • 🔄 Cumbersome tagging for some

HEY Calendar

From 655 App Store ratings

What we love

  • 🚀 Thoughtful and different approach
  • 👍 Lovely UI
  • 👍 Wonderful UI
  • 👍 Innovative features like 'Sometime this Week'

Room to improve

  • 🐛 Buggy and unreliable syncing
  • 🔍 Lacks integration with other calendars
  • 🔍 Missing key features like month/year view and search
  • 🔍 Clunky and unintuitive user experience

Bugs and requests

Supernotes

Reported bugs

2 issues
  • Blank white screen on app/web browser
  • App doesn't work on iOS 15.4.1

Requested features

6 requests
  • iOS widgets for home and lock screens
  • Alert for note space limit and prompt to edit/continue as journal entry
  • Better image and video viewing
  • Control center button
  • Split screen functionality
Show 1 more
  • Ability to create groups or collections of notes

HEY Calendar

Reported bugs

4 issues
  • Events not showing up on calendar
  • Notifications not working as expected
  • Frequent crashes and performance issues
  • Inability to edit events from external calendars

Requested features

5 requests
  • Two-way sync with other calendar services
  • Ability to set custom recurrence patterns
  • Integration with mapping/navigation apps
  • Family/shared calendar support
  • Calendar widget for quick access

In-app purchases

3 purchases

Supernotes

Subscriptions3
  • Supernotes Unlimited (1 Month)$11.001 Month
  • Supernotes Unlimited (Promo)7 Days trial$69.001 Year
  • Supernotes Unlimited (1 Year)$99.001 Year
None

HEY Calendar

No in-app purchases

Questions

Is Supernotes free?
Supernotes is free to download, with in-app purchases available.
Is HEY Calendar free?
HEY Calendar is free to download, with no in-app purchases.
Which has better reviews, Supernotes or HEY Calendar?
Supernotes is rated higher. Supernotes averages 4.8 out of 5 from 122 ratings, while HEY Calendar averages 4.7 from 655 ratings.
Do Supernotes or HEY Calendar have ads?
Neither Supernotes nor HEY Calendar shows ads.
Which is updated more often, Supernotes or HEY Calendar?
Supernotes ships an update monthly, and HEY Calendar fortnightly. Most recently, Supernotes was updated on October 18, 2026 and HEY Calendar on October 19, 2026.

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