The O vs Pentangle
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
The O
This museum companion app uses location awareness to guide you through exhibits, providing information on artworks, amenities, and performances. It allows you to virtually queue for exhibits, save your visit details, and express your opinions on art. Consider it your personal guide to exploring the museum.
- Location-aware exhibit information
- Virtual queueing for exhibits
- Artwork 'Love' and 'Hate' feature
- Museum map
- Food and drink options
- Save visit details
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We don't have labels on the walls at Mona. We have the O. The O uses location awareness to locate you in and around the museum. Use it to find out about artworks nearby, food and drink options, music performances, and other stuff. Love or hate what you see, join virtual queues and wander off, save your visit, and read and listen in your language. Think of the O as your own personal visitor guide at Mona. The O is also how you navigate the Phrontisterion, Mona's library. It replaces Dewey — charting a course through the collection and linking books by association, theme, or obscure whim. Point the camera at any book cover and reveal myriad connections to other items. Search by title, subject, or curiosity. Follow a thread from one book to another, and then somewhere you didn't expect to end up. The O knows where everything is and will take you there.
Pentangle
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Pentangle is a personal shelf for everything you love — music, movies, books, games, podcasts, and TV. Rank your favourites, build shelves by category, and discover what the people you follow are into. Add something, rank it, move on. Over time your shelf becomes an honest record of what you actually think is good — useful when someone asks, and satisfying to keep for its own sake. Follow friends and see their ranked lists. Send items directly to people you think would love them. Find others who share your taste. Your shelf. Your ranking. Your taste.
Screenshots
Verdict
The clearest difference is update cadence: The O at fortnightly against Pentangle's every 5 weeks. 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. Neither carries in-app purchases, so what you see is what you pay.
The O ships an update fortnightly, Pentangle every 5 weeks. The most recent releases landed on October 19, 2026 and October 6, 2026 respectively.
| Parameter | The O | Pentangle |
|---|---|---|
| Price | Free | Free |
| Rating | 3.5 (6 ratings) — better | — |
| Positive reviews | 23.1% of reviews | — |
| Number of ratings | 6 — better | — |
| Update frequency | Fortnightly — better | Every 5 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone | iPhone |
| Requires iOS | 18.0 | 18.0 |
| Further details — not scored | ||
| Size | 63 MB | 23 MB |
| Age rating | 17+ | 12+ |
| Developer | MUSEUM OF OLD AND NEW ART | Za Wa Da Pty Ltd |
In-app purchases
The O
No in-app purchases
Pentangle
No in-app purchases








