WhenAvailable vs Inventary
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
WhenAvailable
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.
- Create unlimited polls
- Invite guests via email or link
- Real-time poll results
- Add themes to polls
- RSVP to invitations
- Guest group storage
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Find the date/time that works best for a group of people. WhenAvailable helps you schedule your event based on when everyone can be there. Whether it is a dinner party, board meeting, or a guys' night out, the app makes it easy to find when works best for the group. Simply select dates and times you want to suggest for your event and then either send invitation emails to your guests through the app or copy a link to share with your guests on social media or via text messaging. Your guests do not need to have the app, sign in, or have an account to mark the times that work for them. WhenAvailable makes it quick and easy to find the best possible time for your event. Use the app for free to: - Create an unlimited number of polls - Invite up to 20 people to vote in each poll by either sending them an email invitation or sharing a link via text or social media to the poll - Real-time poll results - Add a THEME to your poll - View and send messages regarding a poll - RSVP to a poll others have sent you - Store a single guest group if you send a poll repeatedly to the same group of people - The app is always ads-free Optionally, you can buy a Premium subscription to the app. With the Premium subscription, you have a few added benefits, e.g.: - As an organizer, you can vote on behalf of your guests - Upload a cover image and logo for your poll - Invite an unlimited number of guests to the polls you create - Store an unlimited number of guest groups - Send reminders to guests who have not yet voted If you choose to purchase the Premium subscription, your subscription automatically renews annually. You can manage your subscriptions and can turn off auto-renewal by going to your iTunes Account Settings after purchase. The current subscription price is $37.99 USD per year plus tax where applicable. You may also choose to upgrade a single poll with a One-Time Premium purchase. The current price for a One-Time Premium is $9.99 USD plus tax where applicable. When you apply your One-Time Premium credit to a poll you get all the same benefits of the Premium Subscription apart from the additional guest groups. If you have any questions or feedback we are always happy to hear from you: https://whenavailable.com/contact or support@whenavailable.com Terms of Use: https://whenavailable.com/terms Privacy Policy: https://whenavailable.com/privacy
Inventary
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Your guests ask. Inventary answers. Inventary turns your home into a searchable inventory – so your guests find everything themselves, without asking. SET UP IN MINUTES – WITH AI Already have a guest guide? Import it and let the AI do the work: it automatically recognizes areas, information, places and addresses and fills in your digital guide. No more manual typing. YOUR PROPERTY, CLEARLY STRUCTURED Organize your property into areas – from the kitchen to the garage. As many levels as you like, nested as deep as you need. EFFORTLESS INVENTORY Tag devices and items with a few photos. Add the tags yourself – or automatically with AI object recognition in the Pro version. MADE FOR YOUR GUESTS Guests open a personal access via QR code and instantly find what they need: "Where's the hairdryer?", "Is there a corkscrew?" A smart full-text search understands natural language and returns the answer with photo and location. DEVICES & MANUALS Add appliances like the washing machine or coffee maker, attach the manual as a link or PDF, and assign each device to a room. Guests find the instructions exactly where the device is – PDFs open right in the app. LOCAL RECOMMENDATIONS Share your favorite restaurants, cafés and bars, day trips, waste disposal and more – with categories, contact details, opening hours (including an "Open now" filter) and menus. REPORT DAMAGE, STAY IN TOUCH Guests can report damage directly in the app – with photos, PDFs and severity. You handle everything in a shared, automatically translated message thread, with status filters, email notifications and PDF export. CHECK-IN & CHECK-OUT CHECKLISTS Create checklists for arrival, departure and more. Guests tick off each item in the app and confirm completion – you always see the progress and get notified by email. ALL HOUSE INFO IN ONE PLACE • Wi-Fi access with a scannable QR code • House rules, door codes & contact details • Devices with operating instructions • Restaurant and excursion tips • Gallery of every room ALL YOUR PROPERTIES AT A GLANCE Holiday homes, apartments or offices – managed centrally and always at hand. AUTOMATICALLY MULTILINGUAL You maintain everything in your language – Inventary translates the content automatically into 12 languages. Every guest sees everything in their own language. WHAT INVENTARY DOES • Digital guest guide – ready instantly with AI import • Smart full-text search for items • Guest access via QR code • (AI) inventory – manual or automatic (Pro) • Devices with manuals (link or PDF) • Local recommendations with opening hours & menus • Damage reports with chat & PDF export • Check-in & check-out checklists • Unlimited areas • Translated into 12 languages Perfect for vacation rentals, hosts and landlords. Later also for warehouses, hotels, offices and workshops. Terms of Use (EULA) can be found under https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
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.
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. 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.
| Parameter | WhenAvailable | Inventary |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (7 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 7 — better | — |
| Update frequency | Monthly | Every 2 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 58 MB | 12 MB |
| Age rating | 4+ | 12+ |
| Developer | WhenAvailable LLC | 4eBusiness GmbH |
In-app purchases
WhenAvailable
- Premium Membership$37.991 Year
- OneTime Premium$9.99
Inventary
- Inventary Pro Monthly7 Days trial$2.991 Month
- Inventary Pro Month7 Days trial$5.991 Month
- Inventary Basic Yearly14 Days trial$22.991 Year
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- Inventary Pro Yearly14 Days trial$49.991 Year









