# Ancient slavic calendar — Ancient slavic calendar > Ancient Slavic calendar based on hexadecimal calculations and 144-year cycles. (iPhone/iPad app by Arturs Jaskevics.) - Source: https://appshunter.io/ios/app/ancient-slavic-calendar/id1593752564 (this page in markdown: same URL + `.md`) - Developer: [Arturs Jaskevics](https://appshunter.io/developer/1593752566) - Category: Lifestyle - Price: Free with in-app purchases - Rating: 4.00/5 from 1 App Store ratings · 1 written reviews indexed - Age rating: 4+ - Requires: iOS 14.1 · 9 MB - Languages: English, Russian - Released: 2022-01-06 - Data updated: 2026-06-05 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/ancient-slavic-calendar/id1593752564/reviews.md ## What is Ancient slavic calendar? The Old Slavic calendar (Krugolet) is built on the ancient hexadecimal system of calculation, 16 years of the Krugolet pass through 9 Elements, creating the Circle of Life, which has 144 years. The beginning of Years of the Circum-Golet falls on the day of the Autumnal Equinox. On this day, the great ancient holiday New Year began. The full Solar Circle was divided into three periods of time - Autumn, Winter and Spring, and when combined they give a solar circle - Summer. Summer lasts 365.25 days, so 15 Years is 365 days each, and the 16th Summer is 369 days, that is, 4 days are added to the 16th Summer. This periodicity is called the Circle of Years (15 simple + 1 Sacred Summer = 16 Years), and passing through the figurative nine elements create a periodicity of 144 Years - the Circle of Life (16 * 9 = 144). The widespread use of the ancient Slavic Calendar ceased in 1700, when Peter I introduced a foreign calendar. The week was shortened to seven days, and the number of months in the year increased and their names changed. Our project invites you to explore the ancient Slavic calendar and its applications, to try to feel its cycles and dimensions. At the moment, the minimum information on the calendar values ​​is provided. We actively listen to our users and want to develop the project together with them. ## Key features - Hexadecimal calculation system - 16-year Krugolet cycles - 144-year Circle of Life - Autumnal Equinox New Year - Historical comparison to modern calendar ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Donations | $0.99 | one-time | | Donations | $4.99 | one-time | | Donations | $9.99 | one-time | | Donations | $14.99 | one-time | ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/ancient-slavic-calendar/id1593752564/reviews.md ### 4/5 — Good app *2025-04-14* It’s cool and it seems to accurately show the equivalent date of the Gregorian calendar by the old Slavic reckoning but unfortunately I can’t read the Cyrillic alphabet so it would be nice if there were an option for Latin transliteration ## Frequently asked questions about Ancient slavic calendar ### What is the Ancient Slavic Calendar? The Ancient Slavic Calendar, also known as Krugolet, is a historical timekeeping system based on ancient hexadecimal calculations. It features 16-year cycles and a larger 144-year 'Circle of Life'. ### When does the Ancient Slavic Calendar start its year? The year in the Ancient Slavic Calendar begins on the day of the Autumnal Equinox, which was celebrated as the ancient holiday of New Year. ### How does the Ancient Slavic Calendar differ from the modern calendar? The Ancient Slavic Calendar uses a 16-year cycle and a hexadecimal system, with its year beginning at the Autumnal Equinox. This contrasts with the modern Gregorian calendar, introduced by Peter I, which has a seven-day week and a different month structure. ### What is the 'Circle of Life' in the Ancient Slavic Calendar? The 'Circle of Life' is a periodicity of 144 years within the Ancient Slavic Calendar, derived from the 16-year cycles (Krugolet) passing through nine elements (16 * 9 = 144). ### What devices does the Ancient Slavic Calendar support? The Ancient Slavic Calendar is available for iPhone, iPad, and iPod devices. ### Is the Ancient Slavic Calendar free to use? Yes, the Ancient Slavic Calendar is free to download and use. It also offers in-app purchases for additional content or features. ### How often is the Ancient Slavic Calendar updated? The latest version of the Ancient Slavic Calendar is 1.1, which was last updated on March 12, 2022. The developer actively listens to users for future development. ### What is the age rating for the Ancient Slavic Calendar? The Ancient Slavic Calendar has an age rating of 4+, making it suitable for a wide range of users. ## Version history (last 2 releases) ### 1.1 — 2022-03-12 Updated app store page design ### 1.0 — 2022-01-07 No release notes. ## Apps similar to Ancient slavic calendar | App | Rating | Price | Category | | --- | --- | --- | --- | | [Navamsha: Moon Phase Calendar](https://appshunter.io/ios/app/navamsha-moon-phase-calendar/id1125810120) | 4.8 (231) | Free | Lifestyle | | [Astrological Charts](https://appshunter.io/ios/app/astrological-charts/id916564827) | 4.9 (14) | $23.99 | Lifestyle | | [Svetlana Dragan](https://appshunter.io/ios/app/svetlana-dragan/id6504160738) | 5.0 (8) | Free | Lifestyle | | [Ekadasi - Gaurabda Calendar](https://appshunter.io/ios/app/ekadasi-gaurabda-calendar/id6747092586) | — | Free | Lifestyle | | [GetBetter (Life Wheel)](https://appshunter.io/ios/app/getbetter-life-wheel/id1522666671) | — | Free | Lifestyle | | [Astrological Charts Lite](https://appshunter.io/ios/app/astrological-charts-lite/id918924399) | 3.0 (18) | Free | Lifestyle | ## More apps by Arturs Jaskevics - [Daily bliss - Affirmations](https://appshunter.io/ios/app/daily-bliss-affirmations/id1614825482) All apps by Arturs Jaskevics: https://appshunter.io/developer/1593752566 --- *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 2026-06-05.*