Western chart
Astronomical positions.
Sun, Moon, rising sign and the wider birth chart are calculated from date, time and birthplace.
- Unknown time
- Rising sign marked uncertain
- Timezone
- Historical local rules applied
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Coming soon to the App Store
Western astrology and Korean Saju · iPhone
Two charts.
One story.
Saju & Stars calculates a Western birth chart and Korean four pillars from the same birth details. The chart stays fixed; the reading turns those calculated facts into a calm, private reflection.
Your chartsCalculated locally
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甲子丁卯
Reading principleSame birth details, same chart, every time.
Two calculation systems, kept distinct.
The app does not blur the source systems into a vague personality score. It calculates each chart first, then explains where the patterns reinforce or challenge one another.
Korean Saju
Four pillars.
Year, month, day and hour pillars are calculated using traditional calendrics, including the ipchun year boundary.
- Time correction
- True solar time
- Year boundary
- Ipchun, not 1 January
The personal details stay personal.
Birth date, time and place are stored in the iOS Keychain on your device. Kovus does not operate user accounts or hold a server-side database of birth details.
Read the full privacy policy →- Accounts
- None
- Ads or analytics
- None
- Birth-detail storage
- iOS Keychain
- Cloud reading
- Derived chart facts only, processed transiently when enabled
How the reading works.
More detailed subscription, accuracy and privacy help is available in Saju & Stars support.
What is Saju & Stars?
Saju & Stars is an iPhone reflection app that calculates a Western birth chart and Korean Saju four pillars from the same birth details, then presents the two systems in one written reading.
Does the written reading change the chart?
No. The chart is calculated deterministically from the birth details. The written reading explains the computed chart facts; it does not invent or alter the chart.
What if I do not know my birth time?
The app can still calculate most of the chart using midday. It marks the hour pillar and rising sign as uncertain and lets you update the birth time later.
Where are birth details stored?
Birth details are stored on the device in the iOS Keychain. Saju & Stars has no account, advertising or analytics.
Saju & Stars is designed by Josh Waller in Perth, Western Australia.