Chogadia Hisab: planetary hours app, 443K+ downloads
Planetary hours Android app with 443K+ downloads, based on Ikhwan-us-Safaa teachings. Precise astronomical calculations and automatic GPS detection.
The Origin Story
Chogadia Hisab translates Islamic astronomical timing into mobile, drawing on the Ikhwan-us-Safaa kitaab studied at Aljamea tus Saifiyah. The app calculates 12 hours of day from sunrise to sunset and 12 hours of night from sunset to sunrise, with each hour governed by a different planetary influence.
Complex math, simple glance
"Calculations that once needed a book and a calendar are now a glance, anywhere in the world."
The Challenge
Bringing classical Islamic astronomical timing to a phone meant getting the math right. Sunrise and sunset to the second. Day and night each split into 12 unequal hours. All of it for any location, any date, anywhere on Earth.
Critical Pain Points
- Astronomical calculations need to stay precise for any location and any date
- Day and night each split into 12 unequal periods that change with the seasons
- Users want to check timings for any city, not just their current GPS location
- A widget for quick access to the current planetary hour
- Date range support from 1900 to 2100, not just the current year
The knowledge from the Ikhwan-us-Safaa kitaab studied at Aljamea tus Saifiyah needed to live in algorithms that hold up anywhere.
The Solution
A planetary timing app that puts a centuries-old system into a glanceable mobile interface.
Precise astronomical calculations
Sunrise and sunset calculated for any location using astronomical algorithms, then split into 12 day hours and 12 night hours of unequal length.
Automatic GPS detection
Detects the user's location and calculates timings for where they're standing. Manual city selection is also available.
Worldwide city database
Thousands of cities pre-loaded so users can check planetary timings anywhere, not just their current GPS coordinates.
Home screen widget
Shows the current planetary hour and the next transition time without opening the app.
Results & Business Impact
443K+ downloads
Users worldwide rely on the app for daily planning and decision-making.
4.4 stars
Reviews consistently call out the accuracy and how easy it is to glance at.
Works offline
All calculations run locally. No internet needed after install.
Multiple languages
Available in several languages to match the audience.
Technologies Used
- Android
- Java
- SQLite
- WorkManager
- Astronomical Calculations
- ViewPager
- GPS Location Services
- BroadcastReceiver
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