# WhenAvailable vs Availability Sync

The clearest difference is in-app purchases: Availability Sync at none against WhenAvailable's 2. Availability Sync also leads on update cadence (weekly vs monthly) and review sentiment (67% vs 50%). WhenAvailable's advantage is iOS requirement (15.0 vs 17.5). On price, rating, ratings volume and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.3 for WhenAvailable against 4.4 for Availability Sync. Both are backed by a comparable volume of ratings — 7 and 5 respectively. Written reviews are what separate them: 50% of WhenAvailable's written reviews are positive against 67% of Availability Sync's.

WhenAvailable ships an update monthly, Availability Sync weekly. The most recent releases landed on October 7, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | WhenAvailable | Availability Sync |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (7 ratings)](https://appshunter.io/ios/app/whenavailable/id1552751218/reviews) | **[4.4 (5 ratings)](https://appshunter.io/ios/app/availability-sync/id6670766226/reviews)** |
| Number of ratings | **7** | 5 |
| Positive reviews | 50.0% of reviews | **66.7% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Monetization | Freemium | **Free** |
| Size | 58 MB | 10 MB |
| Requires iOS | **15.0** | 17.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [WhenAvailable LLC](https://appshunter.io/developer/1552751220) | [David Fuerst](https://appshunter.io/developer/1754806202) |

## 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 |


### Availability Sync

[App page](https://appshunter.io/ios/app/availability-sync/id6670766226)

Easily share your free time slots for meetings and appointments. This app integrates with your existing calendars and allows for customized sharing messages and professional calendar invites. Streamline your scheduling process and avoid back-and-forth communication.

**Highlights:** Instant availability sharing, Calendar integration (iOS, Google, Outlook), Customizable sharing messages, Professional calendar invitations, Multiple time slot selection, Time zone management

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is WhenAvailable free?

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

### Is Availability Sync free?

Availability Sync is free to download, with no in-app purchases.

### Which has better reviews, WhenAvailable or Availability Sync?

Availability Sync is rated higher. WhenAvailable averages 4.3 out of 5 from 7 ratings, while Availability Sync averages 4.4 from 5 ratings.

### Do WhenAvailable or Availability Sync have ads?

Neither WhenAvailable nor Availability Sync shows ads.

### Which is updated more often, WhenAvailable or Availability Sync?

WhenAvailable ships an update monthly, and Availability Sync weekly. Most recently, WhenAvailable was updated on October 7, 2026 and Availability Sync on September 29, 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.*