Comparison

Prairial vs Interslavic

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Gregorian to French Revolution calendar conversion
  • Today screen widget
  • Apple Watch companion app
  • Decimal time display
  • Standard image representation of months
Features
Read 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).

About

Interslavic

Explore an improvised language that bridges Slavic tongues. Access a dictionary of Interslavic words with translations, search functionality, and transliteration tools. Learn about the history and development of this unique linguistic project.

Highlights
  • Download and view Interslavic words
  • Translations into Slavic languages
  • Search and filter functionality
  • Add words to Favorites
  • Transliteration between Latin and Cyrillic
  • Detailed word information
Read full description

What is Interslavic? - an improvised applied language that spontaneously develops in interslavic contacts; - a scientific interpolation of a hypothetical language that lies at the very center of the Slavic languages; - a modernized continuation of the common ancestor of the Slavic languages ​​(Proto-Slavic) or its close relative, Old Church Slavonic. A bit of history In 2011, Medžuslovjanski was chosen as a common nickname for all Interslavic projects. After the merger of Slovianski and Neoslavonic in 2017, it became Medžuslovjanski. The current version of Interslavic was created in the summer of 2017 by a committee consisting of: Vojtech Merunka, Jan van Steenbergen, Roberto Lombino, Michal Svat and Pavel Skrylev. What does this application give you? - the ability to download and view interslavic words with their translations into a number of Slavic languages; - the functionality of searching for words, adding to Favorites, filtering, choosing spelling, sorting direction, as well as viewing detailed information about a word; - a mechanism for transliterating interslavic words from Latin to Cyrillic and vice versa. When developing the application, part of the code from the GitHub projects interslavic and js-utils was adapted. All rights, including translations, belong to their legal owners. The application is inspired by the online dictionary interslavic-dictionary and the official website of the interslavic language.

Screenshots

Prairial4 screens
Interslavic3 screens

Verdict

The call

The clearest difference is price: Interslavic at Free against Prairial's $0.99. Interslavic also leads on rating (4.8 vs 4.5). Prairial's advantage is in-app purchases (none vs 1) and update cadence (every 6 months vs every 13 months). On review sentiment, ratings volume, ads 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

CostPrice · In-app purchases · Ads · Monetization

Interslavic is free to download; Prairial costs $0.99 up front. Interslavic sells 1 one-off in-app purchase. Prairial asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Interslavic holds the better App Store score, 4.8 against 4.5. Both are backed by a comparable volume of ratings — 4 and 5 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Prairial ships an update every 6 months, Interslavic every 13 months. The most recent releases landed on November 6, 2026 and November 4, 2026 respectively.

Scorecard6 real differences · 4 level
Prairial versus Interslavic: the parameters behind the verdict, then further details
ParameterPrairialInterslavic
Price$0.99Free — better
Rating4.5 (4 ratings)4.8 (5 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings45 — better
Update frequencyEvery 6 months — betterEvery 13 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, Apple WatchiPhone, iPad, Mac
Requires iOS16.0 — better26.0
Further details — not scored
Size4 MB15 MB
Age rating4+12+
DeveloperLaurent RodierDmitry Kanunnikoff

Customer experience

Prairial

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Interslavic

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Prairial

No in-app purchases

1 purchases

Interslavic

One-time1
  • Tip$0.99

Questions

Is Prairial free?
Prairial costs $0.99, with no in-app purchases.
Is Interslavic free?
Interslavic is free to download, with in-app purchases available.
Which has better reviews, Prairial or Interslavic?
Interslavic is rated higher. Prairial averages 4.5 out of 5 from 4 ratings, while Interslavic averages 4.8 from 5 ratings.
Do Prairial or Interslavic have ads?
Neither Prairial nor Interslavic shows ads.
Which is updated more often, Prairial or Interslavic?
Prairial ships an update every 6 months, and Interslavic every 13 months. Most recently, Prairial was updated on November 6, 2026 and Interslavic on November 4, 2026.

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