Comparison

Note Share vs Proton Calendar

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

Head to head
About

Note Share

Create and share digital notes overlaid onto the real world using augmented reality. Point your camera, tap to add notes, and share AR maps with other users. Save maps offline without an account.

Highlights
  • Create unlimited AR post-it notes
  • Share AR note maps with other users
  • Load saved and shared maps anytime
  • Save AR note maps offline
  • Augmented reality note placement
Read full description

Noteshare AR is an augmented reality app that allows you to create and share notes in the physical world with other iOS users. Simply point your camera at a point of interest, tap the screen, and you can add a post-it note in the real world! Features include: -Creating an unlimited amount of post-it notes per AR map -Sharing AR note maps with other iOS users who have the app -Loading saved and shared maps with no time restrictions (e.g., load maps that were saved or shared days, weeks, months, or even years ago!) -Save an AR note map offline without an account Optional Auto-Renewable Subscription Plus Plan - Monthly or Annual -Save an unlimited amount of note maps A subscription charge will be applied to your Apple ID account at confirmation of purchase. Subscriptions will automatically renew unless canceled within 24 hours before the end of the current period. You can cancel subscriptions anytime in your Apple ID account settings after purchase. Any unused portion of a free trial, if offered, will be forfeited if you purchase a subscription. Terms of Service URL: https://appzario.com/terms-of-service.html

About

Proton Calendar

This app helps you manage your schedule with privacy in mind. It offers various viewing options, reminders, and recurring event creation. All your data is protected by end-to-end encryption and strict Swiss privacy laws, ensuring your personal information is not tracked or harvested.

Highlights
  • Agenda and day view
  • View and reply to invites
  • Automatic event addition from email
  • Light and dark mode
  • Multiple reminders
  • Recurring events
  • Cross-device sync
Features
Read full description

A calendar is a record of your life: Proton Calendar helps keep it private. Make the most of your time - See your upcoming events as you like with agenda or day view - View and reply to invites - Events and invites are automatically added to your calendar from your Proton Mail inbox - View your schedule in light or dark mode - Add multiple reminders for your events - Create recurring events on a daily, weekly, monthly, yearly, or custom basis - Keep your calendar in sync across all your devices Private by default - No ads, no trackers, and no data harvesting - We can’t spy on your calendar or misuse your data - Protected by the same end-to-end encryption used in Proton Mail - Event names, descriptions, and participants are stored with zero-access encryption - Based in Switzerland, all your data is protected by strict Swiss privacy laws People before profits - Funded by users, not advertisers — Privacy is our business model - Built by scientists and engineers who met at CERN and MIT and founded Proton Mail - Used by high-profile journalists and organizations globally What others say about Proton: “Proton has now made it stupid-easy to encrypt your schedule. Information about what you plan to do, where, and with whom, can be just as sensitive as the messages you send and receive.” Gizmodo Follow Proton on social media for all the latest news and offers: Facebook: /proton Twitter/X: @protonprivacy Reddit: /protonmail Instagram: /protonprivacy EULA: http://www.apple.com/legal/itunes/appstore/dev/stdeula

Screenshots

Note Share3 screens
Proton Calendar4 screens

Verdict

The call

The clearest difference is monetization model: Proton Calendar at free against Note Share's freemium. Proton Calendar also leads on ratings volume (1.6K vs 9). Note Share's advantage is update cadence (weekly vs every 5 weeks) and iOS requirement (13.0 vs 16.0). On price, rating, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Note Share sells 2 in-app purchases, starting at $2.99 per month and Proton Calendar sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.2 for Note Share against 4.1 for Proton Calendar. That said, the two scores are not equally well evidenced: Proton Calendar has 1.6K ratings behind it against 9, so its average is the more settled of the two.

UpkeepUpdate frequency

Note Share ships an update weekly, Proton Calendar every 5 weeks. The most recent releases landed on October 29, 2026 and November 1, 2026 respectively.

Scorecard4 real differences · 6 level
Note Share versus Proton Calendar: the parameters behind the verdict, then further details
ParameterNote ShareProton Calendar
PriceFreeFree
Rating4.2 (9 ratings) — better4.1 (1.6K ratings)
Positive reviews—40.7% of reviews
Number of ratings91.6K — better
Update frequencyWeekly — betterEvery 5 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better16.0
Further details — not scored
Size9 MB185 MB
Age rating4+4+
DeveloperAppzario LLCProton AG

Customer experience

Note Share

All ratings9 ratings
Positive77.8%
Neutral0.0%
Negative22.2%

Proton Calendar

All ratings1,415 ratings
Positive71.1%
Neutral13.7%
Negative15.2%
Written reviews641 reviews
Positive40.7%
Neutral26.4%
Negative32.9%

Bugs and requests

Note Share

Not enough reviews yet to summarise bugs or requests.

Proton Calendar

Reported bugs

3 issues
  • Issues with time zone settings
  • Notifications not working reliably
  • Inability to edit shared events

Requested features

5 requests
  • Widgets for quick access
  • Ability to invite and share calendars with others
  • Support for importing/exporting calendar data
  • Customization options (colors, alerts, etc.)
  • iPad-optimized version

In-app purchases

2 purchases

Note Share

Subscriptions2
  • Plus Plan - Monthly$2.991 Month
  • Plus Plan - Annual$29.991 Year
2 purchases

Proton Calendar

One-time2
  • Mail Plus (1 year)$59.99
  • Proton Unlimited$149.99

Questions

Is Note Share free?
Note Share is free to download, with in-app purchases available.
Is Proton Calendar free?
Proton Calendar is free to download, with in-app purchases available.
Which has better reviews, Note Share or Proton Calendar?
Note Share is rated higher. Note Share averages 4.2 out of 5 from 9 ratings, while Proton Calendar averages 4.1 from 1.6K ratings.
Do Note Share or Proton Calendar have ads?
Neither Note Share nor Proton Calendar shows ads.
Which is updated more often, Note Share or Proton Calendar?
Note Share ships an update weekly, and Proton Calendar every 5 weeks. Most recently, Note Share was updated on October 29, 2026 and Proton Calendar on November 1, 2026.

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