# WhenAvailable vs Inventary

The clearest difference is update cadence: Inventary at every 2 days against WhenAvailable's monthly. WhenAvailable's advantage is iOS requirement (15.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. WhenAvailable sells 2 in-app purchases, starting at $37.99 per year and Inventary sells 4 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

WhenAvailable ships an update monthly, Inventary every 2 days. The most recent releases landed on October 7, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | WhenAvailable | Inventary |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (7 ratings)](https://appshunter.io/ios/app/whenavailable/id1552751218/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 days** |
| Monetization | Freemium | — |
| Size | 58 MB | 12 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [WhenAvailable LLC](https://appshunter.io/developer/1552751220) | [4eBusiness GmbH](https://appshunter.io/developer/1447877515) |

## 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 |


### Inventary

[App page](https://appshunter.io/ios/app/inventary/id6769693864)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Inventary Pro Monthly | $2.99 | per month |
| Inventary Pro Month | $5.99 | per month |
| Inventary Basic Yearly | $22.99 | per year |
| Inventary Pro Yearly | $49.99 | per year |


## Frequently asked questions

### Is WhenAvailable free?

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

### Is Inventary free?

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

### Do WhenAvailable or Inventary have ads?

Neither WhenAvailable nor Inventary shows ads.

### Which is updated more often, WhenAvailable or Inventary?

WhenAvailable ships an update monthly, and Inventary every 2 days. Most recently, WhenAvailable was updated on October 7, 2026 and Inventary on September 26, 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.*