Synchronized Multi-Calendar Grid: Compare Gregorian, Julian, Islamic Tabular, Hebrew, Indian National (Saka), and regional Indian calendars side-by-side
02 / COMPARATIVE CHRONOLOGY & CALENDARS · v0.1.0
WorldCal Multi-Calendar.One day. Every calendar.
WorldCal (package worldcal.app) is an independent comparative calendar application designed and engineered by Krishna Moni Borah under Cibru. Operating with zero network dependencies, analytics beacons, or cloud tracking, WorldCal enables side-by-side exploration of global, regional, and ancient calendar systems. Features include a synchronized dual-visible comparison grid, Gregorian peek interaction, support for localized scripts (Devanagari, Tamil, Arabic-Indic, Hebrew), astronomical Sankranti and tithi calculations, and historical date reckoning across millennia.
CIBRU — INDEPENDENT DIGITAL STUDIODEVELOPED BY KRISHNA MONI BORAH
THE PURPOSEUseful by nature.
Useful by nature.
Engineered with intention.
A high-precision, 100% offline comparative multi-calendar engine for Android. View, compare, and convert Gregorian, Julian, Islamic Tabular, Hebrew, Indian National (Saka), Vikram Samvat, Tamil Solar, and Chinese Nongli calendars side-by-side with zero network dependencies.
Every release under the Cibru imprint is developed with uncompromising care for battery consumption, memory footprint, and user autonomy. Keystrokes, personal media, and sensitive tokens remain strictly within on-device sandboxes without external telemetry or background tracking.
PRIVACY AT THE COREZero surveillance.
Zero surveillance.
Respect for the user.
—100% on-device calendar conversions: All ephemeris and astronomical computations run locally without network calls.
—Zero app account required: No email, passwords, or mandatory Cibru account required to use or subscribe.
—Google Mobile Ads on free tier: Ads are removed upon verified Google Play subscription or active referral rewards.
—Support and verification requests handled directly via support@cibru.in.
Engineered for speed.
Refined in the details.
100% Offline & Private: All astronomical algorithms, epoch tables, and calendar conversions execute entirely on-device with zero network requests
Gregorian Peek Interaction: Seamlessly cross-reference traditional and astronomical lunar/solar dates against the standard civil Gregorian calendar
Deep Cultural Script Support: Render month names and numbers in authentic native scripts (Devanagari, Tamil, Arabic-Indic, Hebrew) or Latin transliteration
Rigorous Chronological Accuracy: Exact calculations spanning historical cutovers, astronomical eras, solar transitions (Sankranti), and lunar phases (tithis)
Customizable Reckoning Profiles: Configurable week-start days, leap-cycle algorithms, and high-contrast accessibility view modes
Simple by design.
Effortless from day one.
Select Calendars to Compare
Choose up to 5 calendars from the global catalog, with 2 actively synchronized side-by-side on screen.
Navigate Dates & Eras
Jump to any historical or future date across solar, lunar, and lunisolar reckoning systems.
Use Gregorian Peek
Tap or hold any traditional calendar day to immediately inspect its corresponding Gregorian civil date.
Customize Numerals & Scripts
Toggle between native Devanagari, Tamil, Hebrew, or Arabic-Indic numerals and transliterated Latin script in Settings.
Considered at every
single touchpoint.
Need assistance?
Talk to the creator.
Direct developer assistance is provided by Krishna Moni Borah. Have a question, feature suggestion, or compatibility inquiry?