# One Calendar vs GroupCal

The clearest difference is ratings volume: One Calendar at 21K against GroupCal's 884. On price, rating, review sentiment and update cadence there is nothing between them.

Both are free to download. One Calendar sells 1 one-off in-app purchase and GroupCal sells 9 in-app purchases, starting at $14.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.8 for One Calendar against 4.7 for GroupCal. That said, the two scores are not equally well evidenced: One Calendar has 21K ratings behind it against 884, so its average is the more settled of the two. Written reviews are what separate them: 81% of One Calendar's written reviews are positive against 79% of GroupCal's.

One Calendar ships an update every 3 weeks, GroupCal every 2 weeks. The most recent releases landed on November 4, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | One Calendar | GroupCal |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (21K ratings)](https://appshunter.io/ios/app/one-calendar/id1238379385/reviews)** | [4.7 (884 ratings)](https://appshunter.io/ios/app/groupcal-shared-calendar/id1472335927/reviews) |
| Number of ratings | **21K** | 884 |
| Positive reviews | **80.6% of reviews** | 79.1% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 91 MB | 74 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, Apple Watch |
| Age rating | 12+ | 4+ |
| Developer | [Code Spark](https://appshunter.io/developer/1238379384) | [24me](https://appshunter.io/developer/557745945) |

## What reviewers say

### One Calendar

[App page](https://appshunter.io/ios/app/one-calendar/id1238379385)

Consolidate all your calendars from various providers into a single, easy-to-read view. Manage appointments, events, and birthdays efficiently across all your devices. Offers a clean interface for seamless organization.

**Highlights:** Integrates multiple calendar providers, Unified calendar view, Manage appointments and events, Syncs across devices, Customizable colors and themes, Easy to use interface

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OneCalendar premium | $5.99 | one-time |

**What reviewers like**

- 🚀 Easy to use
- 👍 Clean and simple interface
- 👍 Integrates multiple calendars
- 🚀 Syncs across devices
- 👍 Customizable colors and themes

**What reviewers complain about**

- 🐛 Syncing issues
- 🐛 Bugs and glitches
- 🔒 Lacks security features
- 🔋 Drains battery
- 👎 Restrictive features in free version

**Reported bugs**

- Sync errors
- Unresponsive buttons
- Incorrect time zone display
- Duplicate events
- Inability to delete future occurrences of recurring events

**Requested features**

- Multiple reminders for events
- Ability to edit recurring events
- Option to change event calendar after creation
- Printing support
- More customization options


### GroupCal

[App page](https://appshunter.io/ios/app/groupcal-shared-calendar/id1472335927)

Easily create and share calendars for families, teams, or any community. Invite members via phone number or link and receive real-time updates on events. Integrates with existing calendars for a unified view.

**Highlights:** Create multiple shared calendars, Invite via phone number or link, Real-time event updates and notifications, Integrates with existing calendars, Public calendars for businesses and communities, Color-coded calendars and customization, Event attendance tracking

**Features:** Apple Watch app, Vision Pro support, iPhone Duo support

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $14.99 | per month |
| Pro | $14.99 | per month |
| Business | $74.99 | per month |
| GroupCal Pro | $119.99 | per year |
| GroupCal Pro | $119.99 | per year |
| Business + | $224.99 | per month |
| GroupCal Business | $599.99 | per year |
| Business | $599.99 | per year |
| Business + | $1000.00 | per year |

**What reviewers like**

- 👍 User-friendly interface
- 🚀 Efficient scheduling and coordination
- 💡 Helpful for families and small businesses
- 🙌 Great for shared calendars and event planning

**What reviewers complain about**

- 🐛 Occasional bugs and glitches
- 🔒 Concerns about privacy and data access
- 💸 Limited features in free version

**Reported bugs**

- Inability to delete shared calendars
- Calendar events not syncing properly
- Phone number verification issues

**Requested features**

- Color-coding for individual calendars
- Improved recurring event scheduling
- Integration with other calendar apps


## Frequently asked questions

### Is One Calendar free?

One Calendar is free to download, with in-app purchases available.

### Is GroupCal free?

GroupCal is free to download, with in-app purchases available.

### Which has better reviews, One Calendar or GroupCal?

One Calendar is rated higher. One Calendar averages 4.8 out of 5 from 21K ratings, while GroupCal averages 4.7 from 884 ratings.

### Do One Calendar or GroupCal have ads?

Neither One Calendar nor GroupCal shows ads.

### Which is updated more often, One Calendar or GroupCal?

One Calendar ships an update every 3 weeks, and GroupCal every 2 weeks. Most recently, One Calendar was updated on November 4, 2026 and GroupCal on November 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*