# Prairial — French Revolution calendar

> Converts between Gregorian and French Revolution calendars, with Apple Watch support. (iPhone/iPad app by Laurent Rodier.)

- Source: https://appshunter.io/ios/app/prairial/id697920083 (this page in markdown: same URL + `.md`)
- Developer: [Laurent Rodier](https://appshunter.io/developer/697920086)
- Category: Education, Reference
- Price: $0.99
- Rating: 4.30/5 from 3 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 16.0 · 4 MB
- Languages: American English, French (France)
- Released: 2013-09-14
- Data updated: 2026-07-16
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/prairial/id697920083/reviews.md

## What is Prairial?

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).

## Key features

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

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/prairial/id697920083/reviews.md

### 4/5 — Two things:

*2019-03-02*

First: a bug.
When converting the Revolutionary Calendar to the Gregorian calendar, the revolutionary year CCXXXVIII does not fit on the screen.

Second: This app does not convert the Romme Variant of the Revolutionary Calendar.

Thank you • Merci beaucoup
Thank you for reading this

## Frequently asked questions about Prairial

### What is Prairial?

Prairial is a calendar utility that converts between the standard Gregorian calendar and the French Revolution calendar. It also offers a widget and an Apple Watch companion app.

### Does Prairial have ads?

No, Prairial does not contain advertisements. It is a paid application that offers an ad-free experience.

### What devices does Prairial support?

Prairial is supported on Apple Watch, iPhone, and iPad. This allows for convenient access to calendar conversions and features across multiple Apple devices.

### How often is Prairial updated?

The latest version of Prairial is 1.12, last updated on February 16, 2025. This indicates a commitment to maintaining and improving the application.

### What is the age rating for Prairial?

Prairial has an age rating of 4+. This means it is suitable for children and adults, with no mature content.

### What is the price of Prairial?

Prairial costs $0.99 to purchase. This is a one-time fee for full access to the application's features.

### What is decimal time in Prairial?

Decimal time is a feature available on the Apple Watch companion app. It represents the time of day in 10 hours, each with 100 minutes and 100 seconds, as used during the French Revolution era.

### How does Prairial help with learning?

Prairial aids learning by providing a practical tool to understand and visualize the French Revolution calendar system. It offers a unique perspective on historical timekeeping and its differences from the modern Gregorian calendar.

## Version history (last 5 releases)

### 1.12 — 2025-02-16

- iOS 18, watchOS 11 support.
- Minor fixes.

### 1.11 — 2023-02-21

- iOS 16, watchOS 9 support
- Minor fixes.

### 1.10 — 2019-10-20

- iOS 13 support

### 1.9.0 — 2018-02-05

iOS 11 and iPhone X support

### 1.8.0 — 2017-05-15

- Fix Today widget
- Fixes for iOS 10 and iPhone 7

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## More apps by Laurent Rodier

- [Polyhedra 3D](https://appshunter.io/ios/app/polyhedra-3d/id741648895)
- [BaseCalc](https://appshunter.io/ios/app/basecalc/id791106163)
- [My RPN Calc](https://appshunter.io/ios/app/my-rpn-calc/id807032892)
- [Numerals 123](https://appshunter.io/ios/app/numerals-123/id966689313)
- [ITU Morse Codes](https://appshunter.io/ios/app/itu-morse-codes/id1150640591)

All apps by Laurent Rodier: https://appshunter.io/developer/697920086

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-16.*