# Sidera: Korean Astrology — Saju and your birth chart

> Korean Saju and Western birth chart analysis with AI interpretation and compatibility features. (iPhone/iPad app by Su Jin Yang.)

- Source: https://appshunter.io/ios/app/sidera-korean-astrology/id6806914044 (this page in markdown: same URL + `.md`)
- Developer: [Su Jin Yang](https://appshunter.io/developer/6806914046)
- Category: Lifestyle, Entertainment
- Price: Free
- Age rating: 4+
- Requires: iOS 15.1 · 32 MB
- Languages: American English
- Released: 2026-09-07
- Data updated: 2026-09-20
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/sidera-korean-astrology/id6806914044/reviews.md

## What is Sidera?

Sidera computes the sky and the four pillars of the moment you were born, and talks with you about what is actually there.

■ Two systems, side by side
Saju is the Korean reading of a birth moment: the year, month, day, and hour written as eight characters. The Western birth chart reads the same moment as planets, signs, and houses. Sidera runs both from the same birth data and sets them next to each other. You choose which to read from; the default is both. Where the two systems point at the same thing, and where they disagree, are called out separately.

■ The AI does not do the math
Planetary positions and Saju pillars come from a deterministic engine. The AI reads what was computed and interprets it. The same birth details always produce the same chart.

■ Nothing is hidden behind the answer
You can open the raw Saju chart and the raw birth chart in the app. Heavenly stems and earthly branches, the balance of the five elements, planetary positions, house cusps, aspects — all of it. Tap the small number in an answer and you go straight to the placement that sentence rests on.

■ Held up against MBTI
Enter the MBTI type you know yourself by, and Sidera sets it beside the disposition read from your chart and names the axes that disagree. It does not rule one of them correct. The gap itself is what gets discussed.

■ You pick the method
There is more than one way to divide the twelve houses. Whole Sign, Placidus, Equal, and Porphyry are all here, each with an explanation of what it does. On the Saju side you can decide whether to use true solar time and whether hours after 11pm belong to the next day.

■ Compatibility
Register two people and Sidera lays the two skies and the two charts over each other, reading where they lock together and where they pull apart.

Signing up gives you five free questions. Viewing the raw charts and managing profiles stays free.

Sidera's readings are for reference. They do not replace medical, legal, or financial advice, or a conversation with a professional.

## Key features

- Dual Saju and Western birth chart analysis
- AI-driven interpretation of astrological data
- Detailed raw chart exploration
- MBTI type comparison
- Relationship compatibility readings
- Multiple house division methods

## Is Sidera safe?

Not enough ratings yet to assess Sidera.

## Is Sidera legit?

Sidera: Korean Astrology has limited verification signals. The AppsHunter Legitimacy Score for Sidera is 58 out of 100 points across 7 verification signals from App Store and developer data.

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/sidera-korean-astrology/id6806914044/reviews.md

### 5/5 — 재미있음 좀 잘 맞는거같아요

*2026-09-13*

친구들이랑 재미로 궁합 맞춰보기 좋았어용

## Frequently asked questions about Sidera

### What is Sidera?

Sidera is a lifestyle app that computes and interprets your birth chart using both Korean Saju and Western astrology systems. It allows you to view raw data, compare astrological readings with MBTI types, and check compatibility with others.

### Does Sidera have ads?

No, Sidera does not contain advertisements. The app is free to download and use, with optional in-app purchases for additional features or readings.

### How does Sidera compare Saju and Western astrology?

Sidera runs both Saju (Korean birth moment reading) and Western birth charts from the same birth data. It highlights where the two systems agree and where they differ, offering a comprehensive view.

### Can I see the raw data in Sidera?

Yes, Sidera allows you to open and view the raw Saju and birth charts. You can explore elements like heavenly stems, earthly branches, the balance of five elements, planetary positions, house cusps, and aspects.

### How does Sidera handle compatibility?

You can register two people in Sidera to lay their charts over each other. The app then reads where the charts align and where they diverge, providing insights into relationship dynamics.

### What house division methods are available in Sidera?

Sidera offers multiple house division methods, including Whole Sign, Placidus, Equal, and Porphyry. Each method comes with an explanation of its function.

### What is the age rating for Sidera?

Sidera has an age rating of 4+ and is available on iPhone and iPod devices. It was last updated on September 10, 2026, with version 1.4.0.

### How many free questions do I get with Sidera?

Upon signing up for Sidera, you receive five free questions. Viewing raw charts and managing profiles remains free of charge.

## Version history (last 5 releases)

### 1.4.0 — 2026-09-10

Finding your birthplace is far easier. The place list grew from 150 to about 70,000, so small towns and places outside Korea now come up by name. When several places share a name, we show which region each one is in.

The birthplace input is simpler too. Search and manual entry used to sit one above the other, which made it look like both were required; now you pick one or the other.

Fixed several terms that stayed in Korean when the app was set to English.

### 1.3.0 — 2026-09-08

Sidera now speaks English. Every screen, every reading, and the raw charts are all available in English, and you can switch languages in Settings at any time.

Birth places outside Korea are much easier to find, with US cities across every time zone.

### 1.2 — 2026-09-06

쿠폰 등록 화면을 없애고, Apple 로그인 버튼을 Apple 공식 버튼으로 바꿨습니다.

### 1.1 — 2026-09-05

이용권 구매가 열렸습니다. 무료 질문을 다 쓰신 뒤에도 이어서 물어보실 수 있습니다.

### 1.0 — 2026-09-03

No release notes.

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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 2026-09-20.*