# WhenAvailable vs Calendar.online

The clearest difference is review sentiment: Calendar.online at 94% against WhenAvailable's 50%. Calendar.online also leads on in-app purchases (none vs 2) and rating (4.7 vs 4.3). WhenAvailable's advantage is update cadence (monthly vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. WhenAvailable sells 2 in-app purchases, starting at $37.99 per year. Calendar.online asks for nothing beyond the download.

Calendar.online holds the better App Store score, 4.7 against 4.3. That said, the two scores are not equally well evidenced: Calendar.online has 40 ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 50% of WhenAvailable's written reviews are positive against 94% of Calendar.online's.

WhenAvailable ships an update monthly, Calendar.online every 2 months. The most recent releases landed on October 7, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | WhenAvailable | Calendar.online |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (7 ratings)](https://appshunter.io/ios/app/whenavailable/id1552751218/reviews) | **[4.7 (40 ratings)](https://appshunter.io/ios/app/calendaronline/id1607856409/reviews)** |
| Number of ratings | 7 | **40** |
| Positive reviews | 50.0% of reviews | **94.1% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | Freemium | **Free** |
| Size | 58 MB | 65 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [WhenAvailable LLC](https://appshunter.io/developer/1552751220) | [Kalender.digital](https://appshunter.io/developer/1584623403) |

## What reviewers say

### WhenAvailable

[App page](https://appshunter.io/ios/app/whenavailable/id1552751218)

Easily find the best date and time for group events. Suggest multiple options and let attendees vote, or RSVP to invitations. Guests don't need the app to participate.

**Highlights:** Create unlimited polls, Invite guests via email or link, Real-time poll results, Add themes to polls, RSVP to invitations, Guest group storage

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Membership | $37.99 | per year |
| OneTime Premium | $9.99 | one-time |


### Calendar.online

[App page](https://appshunter.io/ios/app/calendaronline/id1607856409)

This free online calendar facilitates team collaboration with shareable access links. Manage permissions, set passwords, and customize views for seamless group scheduling. Access your calendar from any device with a simple bookmark.

**Highlights:** Shareable access links, Role-based permissions (admin, editor, reader), Password protection for links, Customizable access link views, Dashboard for managing calendars, Device bookmarking

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is WhenAvailable free?

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

### Is Calendar.online free?

Calendar.online is free to download, with no in-app purchases.

### Which has better reviews, WhenAvailable or Calendar.online?

Calendar.online is rated higher. WhenAvailable averages 4.3 out of 5 from 7 ratings, while Calendar.online averages 4.7 from 40 ratings.

### Do WhenAvailable or Calendar.online have ads?

Neither WhenAvailable nor Calendar.online shows ads.

### Which is updated more often, WhenAvailable or Calendar.online?

WhenAvailable ships an update monthly, and Calendar.online every 2 months. Most recently, WhenAvailable was updated on October 7, 2026 and Calendar.online on October 14, 2026.

---

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