Occasions 3 vs One Calendar
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Occasions 3
Never forget important dates like birthdays, anniversaries, and holidays again. This app helps you track special events, set multiple custom alerts, and even send well wishes directly from your device. It offers seamless integration with your contacts and calendar, with options for customization and convenient access via widgets and Apple Watch.
- Sync events with Contacts
- Multiple custom alerts per event
- Categorized holiday selection
- Add events to device calendar
- Send messages directly from app
- Customizable themes and icons
- Widgets and Apple Watch app
- Automatic iCloud backup
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Remembering birthdays, anniversaries, holidays and other special events is now easier than ever. Occasions is the best way to keep track of and remember important events in your busy life. You can also send your well wishes to friends and family, right from the app. Here’s what you can do with Occasions as your special-events manager: • Sync birthdays, anniversaries and other events with Contacts. • Set up to 3 alerts for each event, and customize alerts for individual events. • Choose from a wide selection of holidays, conveniently categorized by country and religion. • Add events from Occasions to your device’s built-in calendar. • Create events that are independent of Contacts. • Send messages to friends and loved ones via phone, email or text, right from the app. • Change the app's look and feel with themes and app icons. • Glance at the widgets and Apple Watch app to see timely event information. • Automatically back up your data to iCloud.
One Calendar
Consolidate all your digital calendars into a single, easy-to-read view. Manage appointments, events, and birthdays from various providers like Google, Outlook, iCloud, and more, all within one application.
- Integrates multiple calendar providers
- Easy-to-read overview
- Manage appointments and events
- View birthdays
- Cross-platform availability
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The most popular app to view all your calendars like Google, Live, Outlook, iCloud, Exchange, Office365, Yahoo, Nextcloud, Synology, GMX, Mailbox.org, ownCloud and more. OneCalendar integrates all your calendars into an easy-to-read overview. View and manage all your appointments, events and birthdays. OneCalendar is available on all platforms.
Screenshots
Verdict
The clearest difference is price: One Calendar at Free against Occasions 3's $2.99. One Calendar also leads on update cadence (fortnightly vs every 3 months) and ratings volume (21K vs 2.4K). Occasions 3's advantage is in-app purchases (none vs 1). On rating, review sentiment, ads and device support 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
One Calendar is free to download; Occasions 3 costs $2.99 up front. One Calendar sells 1 one-off in-app purchase. Occasions 3 asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.8 for Occasions 3 against 4.8 for One Calendar. That said, the two scores are not equally well evidenced: One Calendar has 21K ratings behind it against 2.4K, so its average is the more settled of the two. Written reviews are what separate them: 75% of Occasions 3's written reviews are positive against 81% of One Calendar's.
Occasions 3 ships an update every 3 months, One Calendar fortnightly. Both last shipped on November 1, 2026.
| Parameter | Occasions 3 | One Calendar |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 4.8 (2.4K ratings) — better | 4.8 (21K ratings) |
| Positive reviews | 74.6% of reviews | 80.6% of reviews — better |
| Number of ratings | 2.4K | 21K — better |
| Update frequency | Every 3 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 18.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 18 MB | 89 MB |
| Age rating | 4+ | 12+ |
| Developer | Hand Carved Code, LLC | Code Spark |
Customer experience
Occasions 3
One Calendar
User reviews
Occasions 3
From 2.4K App Store ratingsWhat we love
- 🚀 Useful calendar
- 👍 Outstanding app
- 👍 Excellent app
- 👍 Great app
- 👍 Reliable and fun to use
Room to improve
- 🐛 Annoying app
- 🐛 Duplicate notifications
- 🐛 Sync issues
- 🐛 Duplicate notifications
- 🐛 Duplicate notifications
One Calendar
From 21K App Store ratingsWhat we love
- 🚀 Easy to use
- 👍 Clean and simple interface
- 👍 Integrates multiple calendars
- 🚀 Syncs across devices
- 👍 Customizable colors and themes
Room to improve
- 🐛 Syncing issues
- 🐛 Bugs and glitches
- 🔒 Lacks security features
- 🔋 Drains battery
- 👎 Restrictive features in free version
Bugs and requests
Occasions 3
Reported bugs
5 issues- Duplicate notifications
- Sync issues
- Data loss
- Compatibility issues with older devices
- Facebook SDK error
Requested features
6 requests- Add military birthdays
- Repeat functionality
- Sync with Apple Watch
- Separate categories for events
- Zodiac sign display
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- Public occasion lists
One Calendar
Reported bugs
5 issues- Sync errors
- Unresponsive buttons
- Incorrect time zone display
- Duplicate events
- Inability to delete future occurrences of recurring events
Requested features
6 requests- Multiple reminders for events
- Ability to edit recurring events
- Option to change event calendar after creation
- Printing support
- More customization options
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- Widgets for better visibility
In-app purchases
Occasions 3
No in-app purchases
One Calendar
- OneCalendar premium$5.99
Questions
Is Occasions 3 free?
Is One Calendar free?
Which has better reviews, Occasions 3 or One Calendar?
Do Occasions 3 or One Calendar have ads?
Which is updated more often, Occasions 3 or One Calendar?
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