# Kairon vs astrx Calculator

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.

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.

## The numbers

| Metric | Kairon | astrx Calculator |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | [3.0 (8 ratings)](https://appshunter.io/ios/app/kairon/id337746926/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/astrx-calculator/id1609741077/reviews)** |
| Number of ratings | **8** | 1 |
| Positive reviews | **51.4% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 months** |
| Monetization | Paid | **Free** |
| Size | 37 MB | 6 MB |
| Requires iOS | 17.0 | **16.6** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Kairon K.S.](https://appshunter.io/developer/337746929) | [Alexander Genna](https://appshunter.io/developer/1609741079) |

## What reviewers say

### Kairon

[App page](https://appshunter.io/ios/app/kairon/id337746926)

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.

**Highlights:** Precise astrological calculations, 26 house systems, 29 Anayamsas, 23 Aspects plus parallel, Extensive ephemeris data, Multiple zodiac and chart types, Synastry, Composite, Transits, Progressions

**Features:** macOS Compatibility, Vision Pro support, iPhone Duo support

**In-app purchases:** none


### astrx Calculator

[App page](https://appshunter.io/ios/app/astrx-calculator/id1609741077)

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.

**Highlights:** Calculate astrological lots, Enter zodiacal placements, Display decimal degrees, Alternative calculation methods, Pin and recall lots, Searchable list of lot formulas, Determine essential dignities

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Vettius Valens of Antioch | $0.99 | one-time |
| Julius Firmicus Maternus | $0.99 | one-time |
| Dorotheus of Sidon | $0.99 | one-time |
| Abu Ma shar al-Balkhi | $1.99 | one-time |
| Avraham ibn-Ezra | $1.99 | one-time |
| Guido Bonatti | $1.99 | one-time |


## Frequently asked questions

### Is Kairon free?

Kairon costs $9.99, with no in-app purchases.

### Is astrx Calculator free?

astrx Calculator is free to download, with in-app purchases available.

### Which has better reviews, Kairon or astrx Calculator?

astrx Calculator is rated higher. Kairon averages 3.0 out of 5 from 8 ratings, while astrx Calculator averages 5.0 from 1 ratings.

### Do Kairon or astrx Calculator have ads?

Neither Kairon nor astrx Calculator shows ads.

### Which is updated more often, Kairon or astrx Calculator?

Kairon ships an update every 6 months, and astrx Calculator every 3 months. Most recently, Kairon was updated on November 10, 2026 and astrx Calculator on November 3, 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.*