Kairon vs astrx Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Kairon
This app provides precise astrological calculations without interpretations. It offers extensive customization for house systems, aspects, and celestial bodies, with a wide range of charting methods and zodiacs. Users can cast charts for a vast historical period and view detailed positional data.
- Precise astrological calculations
- 26 house systems
- 29 Anayamsas
- 23 Aspects plus parallel
- Extensive ephemeris data
- Multiple zodiac and chart types
- Synastry, Composite, Transits, Progressions
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Kairon is an astrology calculation software for highest precision calculations. Kairon will not do any interpretations for you, nor will it teach you astrology. ************************************************ Kairon can be very individually configured, or it can be used with the standard settings as is. All settings take immediate effect and are no longer outside of the app like in previous versions. ************************************************ Features: Self updating atlas, that will go with every update of the iOS itself. 26 house systems 29 Anayamsas 23 Aspects plus parallel Kairon contains the Ephemeris data for - Sun - Moon - Mercury - Venus - Mars - Jupiter - Saturn - Uranus - Neptune - Pluto - true and mean Nodes. Additionally you have the following Asteroids and Objects built in: - True and Mean Lilith - Chiron - Pholus - Nessus - Lilith (Asteroid) - Ceres - Pallas - Juno - Vesta - Isis - Quaoar - Sedna - Vulcan - Part of Fortune - Part of Spirit - Vertex - and more, including Eris, Witte's planets and many asteroids... You can cast your charts from the years 1200 - 2399 for all the above objects. There are two Zodiacs, one with twelve equal signs, the other with those twelve equal signs surrounded by 13 differently sized signs which reflects the actual sky at night. Included is also the medieval square chart and the two basic vedic square charts. Retograde objects are (optionally) drawn in a separate color. The chartwheel and the aspectgrid can be scaled, colors can be stored in setting objects, so you can switch your look and feel with your moods. The following Methods are implemented: - Synastry - Composite - Combine - Solar - Lunar - Transits - Progressions. In text-View you get exact planet and house positions to one second of arc. Lists can be displayed showing Firdaria Listing in Text Mode, medieval dignities, vedic dignities, positions of cusps and objects.
astrx Calculator
This app simplifies the calculation of astrological lots, offering an intuitive interface for both practicing astrologers and enthusiasts. It provides a growing list of lot formulas, detailed calculations, and customizable display options for a personalized astrological experience.
- Calculate astrological lots
- Enter zodiacal placements
- Display decimal degrees
- Alternative calculation methods
- Pin and recall lots
- Searchable list of lot formulas
- Determine essential dignities
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astrx makes the calculation of astrological lots simple, allowing you to focus on the Astrology. You'll appreciate its simple, intuitive interface, and love the every growing list of lot formulas it puts in your pocket. Whether you're a practicing astrologer, or just an enthusiast looking to explore this fascinating technique with your own chart, you'll find astrx an invaluable tool if you have an interest in working with Astrological Lots. - Enter Zodiacal Placements - Displays Decimal Degree of Entered Placements - Provides alternative calculation (by counting of whole signs) option - Easily Swap Zodiacal Placements for Sect Reversal - Tap to Send the Calculated Lot Placement to the "Begin At" or "Count To" Field for the Next Calculation - Pin Lots you are working with for easy recall, and reference to Sign, Lord and Term Lord - Review many Lots Formulas in the List of Lots - Search the List of Lots by Name, Common Synonym and Keywords - Search the List of Lots with Logical AND|OR comparison of Significators - Set Display Colors to Increase Contrast, or Just Match Your Mood - Determines Whole Sign House of the Calculated Lot - Automatically Displays Modality of the House and Triplicity of the Sign -- Automatically Determines Essential Dignities of the Calculated Lot -- Domicile Rulership -- Triplicity Rulership -- Term Rulership -- Decan Rulership -- Calculates Dodekatemorion (12th part) of placement -- Calculates Antiscia and Contra-Antiscia -- Calculates Zodiacal Midpoint of "Begin At" and "Count To" Significators - Automatically Updates Rulerships Based on Selected Sect - Configurable Astrological Systems -- Triplicity Traditions of Dorotheus or Ptolemy -- Systems of Terms by the Egyptian's, Chaldean's or Ptolemy's -- Decans in Chaldean Order or by the Triplicity Method - Add to the Library of Lot Formulas at your Fingertips in the List of Lots -- Compare Formulas of Different Traditional Authors in the List of Lots CONTACT: Do you have questions, feedback or good ideas? Are there Lots you would like to see added to astrx, we are always happy to hear from you! Please contact us at info@PracticalEndeavors.com. Terms of Use see the Apple’s Standard License Agreement at: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is review sentiment: Kairon at 51% against astrx Calculator's 0%. Kairon also leads on in-app purchases (none vs 6) and ratings volume (8 vs 1). astrx Calculator's advantage is price (Free vs $9.99) and rating (5.0 vs 3.0). On ads, device support and iOS requirement 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
astrx Calculator is free to download; Kairon costs $9.99 up front. astrx Calculator sells 6 one-off in-app purchases. Kairon asks for nothing beyond the download.
astrx Calculator holds the better App Store score, 5.0 against 3.0. That said, the two scores are not equally well evidenced: Kairon has 8 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 51% of Kairon's written reviews are positive against 0% of astrx Calculator's, so the app with the better star average is not the one people write more warmly about.
Kairon ships an update every 6 months, astrx Calculator every 3 months. The most recent releases landed on November 10, 2026 and November 3, 2026 respectively.
| Parameter | Kairon | astrx Calculator |
|---|---|---|
| Price | $9.99 | Free — better |
| Rating | 3.0 (8 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 51.4% of reviews — better | 0.0% of reviews |
| Number of ratings | 8 — better | 1 |
| Update frequency | Every 6 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.0 | 16.6 — better |
| Further details — not scored | ||
| Size | 37 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Kairon K.S. | Alexander Genna |
Customer experience
Kairon
astrx Calculator
In-app purchases
Kairon
No in-app purchases
astrx Calculator
- Vettius Valens of Antioch$0.99
- Julius Firmicus Maternus$0.99
- Dorotheus of Sidon$0.99
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- Abu Ma shar al-Balkhi$1.99
- Avraham ibn-Ezra$1.99
- Guido Bonatti$1.99
Questions
Is Kairon free?
Is astrx Calculator free?
Which has better reviews, Kairon or astrx Calculator?
Do Kairon or astrx Calculator have ads?
Which is updated more often, Kairon or astrx Calculator?
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