One Calendar vs WidgetCal
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
WidgetCal
Perform calculations directly from your home screen with advanced functions. Customize your experience with multiple themes. Unlock premium features through a subscription.
- Home screen widget calculator
- Trigonometric and calculus functions
- Over 10 beautiful themes
- No ads
- Monthly/annual subscription for Pro features
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WidgetCal - Widget calculator allows you to calculate on your home screen - Supports trigonometric functions, logarithms, square root, square, reciprocal, π, and calculus tools for derivative at x and definite integral over [a, b] - Home Screen Widget Calculator (iOS 17 Interactive Widgets) - Over 10+ beautiful themes - No Ads ----- WidgetCal Pro is available with a monthly or annual subscription. You can subscribe and pay through your Apple account. Your subscription will automatically renew unless canceled at least 24 hours before the end of the current period. Auto-renew may be turned off after purchase. Terms of Use: https://www.zhihuke.com/widgetcal/terms.html Privacy Policy: https://www.zhihuke.com/widgetcal/privacy.html
Screenshots
Verdict
The clearest difference is update cadence: One Calendar at fortnightly against WidgetCal's every 32 months. One Calendar also leads on ratings volume (21K vs 1) and device support (4 vs 2). WidgetCal's advantage is rating (5.0 vs 4.8). On price, ads, in-app purchases and monetization model 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. One Calendar sells 1 one-off in-app purchase and WidgetCal sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.
WidgetCal holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: One Calendar has 21K ratings behind it against 1, so its average is the more settled of the two.
One Calendar ships an update fortnightly, WidgetCal every 32 months. The most recent releases landed on September 25, 2026 and August 27, 2026 respectively.
| Parameter | One Calendar | WidgetCal |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (21K ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 80.7% of reviews | — |
| Number of ratings | 21K — better | 1 |
| Update frequency | Fortnightly — better | Every 32 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 89 MB | 3 MB |
| Age rating | 12+ | 4+ |
| Developer | Code Spark | 杏娣 吴 |
Customer experience
One Calendar
WidgetCal
Bugs and requests
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
WidgetCal
Not enough reviews yet to summarise bugs or requests.
In-app purchases
One Calendar
- OneCalendar premium$5.99
WidgetCal
- WidgetCal Pro$0.991 Month
- WidgetCal Pro7 Days trial$3.991 Year
Questions
Is One Calendar free?
Is WidgetCal free?
Which has better reviews, One Calendar or WidgetCal?
Do One Calendar or WidgetCal have ads?
Which is updated more often, One Calendar or WidgetCal?
Other comparisons
