Unfold vs Prairial
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Unfold
Explore the mathematical and artistic beauty of 3D geometric solids on your device. Interact with 63 different symmetrical shapes, rotating and unfolding them to understand their geometry. Discover Platonic, Archimedean, and Johnson solids with an elegant interface and customizable colors.
- Interactive 3D solids
- 63 different geometric shapes
- Rotate and zoom functionality
- Fold and unfold solids
- 18 color options
Read full descriptionHide full description
Unfold brings the geometry of 3D solids to life on your iPad and iPhone in an elegant and intuitive way. The artistic and mathematical beauty of these symmetrical forms has been studied for thousands of years, and now it is easier than ever to learn about these shapes. • Beautiful and simple user interface • 63 different shapes · Platonic Solids · Archimedean Solids · Johnson Solids · Prisms · Rectangular Prisms · Antiprisms • Rotate the solids to explore and learn about their shapes • Pinch & Zoom to fold and unfold the solids • Switch between 18 gorgeous colors
Prairial
This utility converts between the standard Gregorian calendar and the historical French Revolution calendar. It offers a widget for the current date in the Revolutionary era and an Apple Watch companion with dual display options, including decimal time.
- Gregorian to French Revolution calendar conversion
- Today screen widget
- Apple Watch companion app
- Decimal time display
- Standard image representation of months
Read full descriptionHide full description
Prairial is a calendar utility that allows converting between the standard calendar (a.k.a. Greogorian) and the short-lived French Revolution one. The Today screen widget presents the present date of the Revolution era. The Apple Watch companion presents the present date of the Revolution era on 2 alternate screens, one with the standard image representation of the month, and the decimal time of the day (10 hours of 100 minutes of 100 seconds).
Screenshots
Verdict
The clearest difference is monetization model: Unfold at free against Prairial's paid. Unfold also leads on ratings volume (47 vs 3) and iOS requirement (13.0 vs 16.0). Prairial's advantage is review sentiment (100% vs 84%) and update cadence (every 6 months vs every 14 months). On price, rating, ads and in-app purchases 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
Unfold costs $0.99 and Prairial $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 4.2 for Unfold against 4.3 for Prairial. That said, the two scores are not equally well evidenced: Unfold has 47 ratings behind it against 3, so its average is the more settled of the two. Written reviews are what separate them: 84% of Unfold's written reviews are positive against 100% of Prairial's.
Unfold ships an update every 14 months, Prairial every 6 months. The most recent releases landed on October 29, 2026 and October 23, 2026 respectively.
| Parameter | Unfold | Prairial |
|---|---|---|
| Price | $0.99 | $0.99 |
| Rating | 4.2 (47 ratings) | 4.3 (3 ratings) — better |
| Positive reviews | 83.9% of reviews | 100.0% of reviews — better |
| Number of ratings | 47 — better | 3 |
| Update frequency | Every 14 months | Every 6 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 13.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 1 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Paul Hangas | Laurent Rodier |
Customer experience
Unfold
Prairial
In-app purchases
Unfold
No in-app purchases
Prairial
No in-app purchases
Questions
Is Unfold free?
Is Prairial free?
Which has better reviews, Unfold or Prairial?
Do Unfold or Prairial have ads?
Which is updated more often, Unfold or Prairial?
Other comparisons
