# Kairon

> Astrology calculation software for precise astrological chart generation. (iPhone/iPad app by Kairon K.S..)

- Source: https://appshunter.io/ios/app/kairon/id337746926 (this page in markdown: same URL + `.md`)
- Developer: [Kairon K.S.](https://appshunter.io/developer/337746929)
- Category: Lifestyle, Reference
- Price: $9.99
- Rating: 3.00/5 from 8 App Store ratings · 110 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.6 · 37 MB
- Languages: American English, German (Germany), Japanese
- Released: 2009-12-03
- Data updated: 2026-09-05
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/kairon/id337746926/reviews.md

## What is Kairon?

Kairon is an astrology calculation software for highest precision calculations.
Kairon will not do any interpretations for you, nor will it teach you astrology.

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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.

## Key features

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

## Recent user reviews (10 of 110)

All indexed reviews: https://appshunter.io/ios/app/kairon/id337746926/reviews.md

### 5/5 — Love this program!

*2026-04-19, version 2.14*

I absolutely love this program! However, right now, I cannot edit my list of people, clicking the edit button to add a new group or chart closes the program completely. I’d really love for this to be fixed! Also, the floating sidebar is a teensy bit annoying. Is there a way to have it optional as floating or fixed? Keep up the great work!

### 5/5 — Sehr gute Unterstützung in der Beratung

*2025-09-21*

Gutes Programm, es gibt wirklich nichts besseres um schnell mit Klienten arbeiten zu können. Daher 5 Sterne, wenngleich ich mir sehr wünschen würde, das Standard iOS Dialoge implementiert würden. Die aktuelle Methode ist kompliziert und wirkt veraltet hausbacken. Dabei sind die Standard-Dialoge doch in der Entwicklungsumgebung schon vorgefertigt vorhanden.

### 4/5 — 素晴らしい！のですが…

*2024-11-17*

ビュー表示にした時、チャートに文字が掛かる場合がある。フォントサイズが選べるとよいですね。

場所の指定もバグなのか地図でポイントを指すしかないようで現状不便。出来るのであれば日本での住所検索の正しいやり方を公開して欲しい。

オーブを天体別に指定できると嬉しいが、ほかの多くのアプリ同様、できません。

このバージョンは天文暦が1996年以降のようです。それを境に過去チャートは JST がクリアされます。

とはいえ、チャートはとても美しく大好きなアプリケーションです。

**Developer response:** Thank you for liking Kairon.
If you have questions, i answer immediately within one business day, but of course not here, this is not the place to ask questions. 
Yet, it is not true, that you can not set orbs for planets in iKairon: just go to settings:objects and click on each planet and see, what orbs are set and overwrite them to your liking. Sames goes for the aspects.
No charts are being deleted and calculations go back to 1200AD and up until 2400AD.
Please contact support if you encounter any problems, this is what support is good for.
Nobody is left alone with Kairon. 
And, last, but not leas: Observer your spam folder after you put a request, as unfortunately many of my answers are being filterered out.

### 3/5 — Somewhat good

*2023-12-23, version 2.13*

Calculations are very accurate everything is good it would be better if you had the divisional charts available. Other than that good for natal readings.

### 2/5 — アスペクトが一部表示されない

*2023-01-02*

ホロスコープをチェックしてて違和感を感じたので、他の天文歴を使ってホロスコープを出すと、トラインのアスペクトが表示されてませんでした。
設定でアスペクトを表示するようになっているし、オーブも12まで上げても表示されません。
こういうバグ?があると安心して使えません。
それ以外の機能は気に入ってるので、どうにかならないものでしょうか。

**Developer response:** Why don‘t you people contact support with your questions? In the settings every single aspect can be set to a maximum orb, same with every aspect… just by clicking the symbol of the object.

### 4/5 — Лучше всех остальных

*2021-08-08*

Это самая удобная в использовании их всех представленных на рынке. Интерфейс норм, ввод данных не сложный. И есть даже прогрессии и композит. 
Недочеты такие: 
1) не показывает в самой карте значок ретроградности. Вот почему?? Если я фото в своём блоге выкладываю, это ключевой момент. 
2) не понятно, что такое Combine. Что за такой метод совмещения карт? Жаль, что все на английском. В программе Зет ничему не соответствует….

### 3/5 — 一般般

*2021-02-22*

不能即时快速排出当下时间盘。星盘不能转动。总之界面不怎么友好。

### 2/5 — iPhoneとiPadで使っています

*2021-02-01*

見やすいのでとても気に入っているのですが、iPadだと詳細な出生地の選択ができないのが気になります。なんとかなりませんか？iPhoneだと細かく設定できるのはわかったのですが、、、

**Developer response:** In due time, more details of a location will be displayed on both, iPad and iPhone. If you may be having difficulties selecting or finding a specific location, please go to Settings:Calculation and choose "List by Countries" (and also try out if maybe "only exact search results" is better on or off for you. For support, please, use the support link, as i can not mail back on this form.

### 2/5 — Ich bin enttāuscht

*2020-03-07*

Dass es keine Texte und Erlāuterungen gibt, war klar und akzeptiert. 
Aber es fehlen Selbstverständlichkeiten wie die Einstellung eines Default Ortes und nicht alle Graphiken sind angemessen bezeichnet.
Für Anfänger völlig ungeeignet, für Fortgeschrittene unzureichend.

**Developer response:** Welche Grafiken vermissen welche Bezeichnung und warum benötigen Grafiken überhaupt Bezeichnungen?

### 3/5 — Stuck in Eastern chart mode

*2020-01-25, version 2.08*

Update: 1/25/20 One year after my 2-Star review I get a developer response. That’s a pretty terrible amount of time lost, temporarily adding one star cos it appears I can start using it again but lost time isn’t quite helpful. 3-Stars.

Just took a look at the newest update and the import charts feature of recovery is nice.

I wanted to adjust the look back to black or a darker more so i started with the customizations.

I also wanted to use Solar houses and once I changed a few options on this page the entire chart would not change back. It is stuck in Eastern chart mode and won’t return to a Western wheel.

Please fix! I’ve been using 8y.

## Frequently asked questions about Kairon

### What does Kairon do?

Kairon is an astrology calculation software designed for the highest precision in astrological calculations. It allows users to generate detailed astrological charts and provides extensive data on celestial body positions without offering interpretations or astrological lessons.

### What are the key features of Kairon?

Key features include a self-updating atlas, 26 house systems, 29 Anayamsas, 23 aspects plus parallel, and comprehensive ephemeris data for planets, nodes, asteroids, and other celestial objects. It supports various chart types, zodiacs, and calculation methods like Synastry, Composite, Transits, and Progressions.

### How much does Kairon cost?

Based on the provided information, Kairon is a paid application. There are no mentions of free trials, subscriptions, or in-app purchases, indicating a one-time purchase model.

### What astrological methods are supported?

Kairon supports a wide range of astrological methods including Synastry, Composite, Combine, Solar, Lunar, Transits, and Progressions. It also offers detailed text views with exact planet and house positions to one second of arc.

### What is the range of years for chart casting?

Users can cast astrological charts for all supported objects from the years 1200 to 2399. This extensive range allows for historical astrological analysis and future projections.

## Version history (last 5 releases)

### 2.14 — 2026-02-10

Fixed tab bar for iPad, so that it supports liquid glass, and the icon as well.
Same for iPhone.

### 2.13 — 2023-10-08

Fixed issue where positions would not be considered south before the degree was at least -1.

### 2.12 — 2023-03-13

Size-fix for iPhone 14
Newly created charts automatically open for editing
Data entry no longer loses input if no other field was clicked before
A quick edit button of the present chart on top right of the first screen
Texts with double quotes no longer disturb the import

### 2.11 — 2022-09-03

Bugfix: Prints now show the correct retrograde information in the list.
New feature: In Preferences:Grafics:Default chart type: Now you can also select Print view as default view or choose from contextual menu (pressing into center of chart view)
New feature: In Preferences:Grafics:Hide Aspectlines in round chart -> now a chart can be displayed without aspect lines, while aspects still stay in the grid view (looks best with option Draw Aspectlines on objects)

### 2.10 — 2021-12-12

Corrected display for iPhoneSE (2nd Gen).
Added AppleMaps to refine atlas results.

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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 2026-09-05.*