# Unfold vs Prairial

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.

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.

## The numbers

| Metric | Unfold | Prairial |
| --- | --- | --- |
| Price | $0.99 | $0.99 |
| Rating | [4.2 (47 ratings)](https://appshunter.io/ios/app/unfold/id557099803/reviews) | **[4.3 (3 ratings)](https://appshunter.io/ios/app/prairial/id697920083/reviews)** |
| Number of ratings | **47** | 3 |
| Positive reviews | 83.9% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 6 months** |
| Monetization | **Free** | Paid |
| Size | 1 MB | 4 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Paul Hangas](https://appshunter.io/developer/433121902) | [Laurent Rodier](https://appshunter.io/developer/697920086) |

## What reviewers say

### Unfold

[App page](https://appshunter.io/ios/app/unfold/id557099803)

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.

**Highlights:** Interactive 3D solids, 63 different geometric shapes, Rotate and zoom functionality, Fold and unfold solids, 18 color options

**Features:** macOS Compatibility

**In-app purchases:** none


### Prairial

[App page](https://appshunter.io/ios/app/prairial/id697920083)

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.

**Highlights:** Gregorian to French Revolution calendar conversion, Today screen widget, Apple Watch companion app, Decimal time display, Standard image representation of months

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Unfold free?

Unfold costs $0.99, with no in-app purchases.

### Is Prairial free?

Prairial costs $0.99, with no in-app purchases.

### Which has better reviews, Unfold or Prairial?

Prairial is rated higher. Unfold averages 4.2 out of 5 from 47 ratings, while Prairial averages 4.3 from 3 ratings.

### Do Unfold or Prairial have ads?

Neither Unfold nor Prairial shows ads.

### Which is updated more often, Unfold or Prairial?

Unfold ships an update every 14 months, and Prairial every 6 months. Most recently, Unfold was updated on October 29, 2026 and Prairial on October 23, 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.*