Tamil-first panchanga and srardham calendar. All your ancestors' observances, on-device, private by default.
Pitru Calendar is a Tamil-first panchanga, designed for families who keep their ancestors close.
Track the daily tithi, Tamil month and day, nakshatra, and paksha with names you already know — வளர்பிறை பிரதமை, தை 1, கார்த்திகை — the way Pambu Panchangam and Arcot Panchangam print them. Every day's panchanga is computed from the Vakya tradition; Vakya-vs-Drik differences are documented openly.
For Iyer and Iyengar families, the app makes ancestor srardham observances easy to track. Add each ancestor once — name, gothram, the tithi and Tamil month of their passing — and the calendar surfaces every annual srardham, Mahalaya tarpanam, and aabdikam date going forward.
Festivals included for Tamil Nadu and pan-India Hindu observance: Thai Pongal, Aadi Perukku, Aavani Avittam, Vinayagar Chaturthi, Mahalaya Amavasai, Vijayadashami, Karthigai Deepam, Vaikunta Ekadashi, Maasi Magam, Panguni Uthiram, and the full Ekadashi / Pradosham / Sankashti Chaturthi cycle.
Privacy is the foundation:
• Everything stays on your device. No analytics. No third-party tracking. No SDK.
• Ancestor names never leave the app — Siri reads only dates, never names.
• Backups are encrypted with your passphrase using AES-GCM-256.
• iCloud sync (optional) uses Apple's private database with end-to-end encryption.
Tamil VoiceOver is supported with proper language tagging. Apple Watch and Lock Screen widgets show today's panchanga at a glance. Siri shortcuts: "What's today's panchanga?" "When is the next srardham?"
The app is bilingual: Tamil names are primary; English alternates are always present.
Ratings & Reviews
This app hasn’t received enough ratings or reviews to display an overview.
v1.8 — Parity and polish: the daily Sankalpam now recites the next nakshatra alongside next tithi/yoga/karana; the Festivals tab surfaces observances up to 10 years out instead of hiding anything past a year; and Settings replaces the Gotra + Veda text fields with pickers (the same 24-entry Gothram catalog Family uses, plus a 4-Veda menu).
Sankalpam — next nakshatra: The sankalpam sheet already reads "[current tithi] (until X) then [next tithi]" for tithi, yoga, and karana. It now does the same for nakshatra — "[current] nakshatra (until X) pinpu [next] nakshatra yuktayam" in the English column and "[current] நக்ஷத்ர யுக்தாயாம் (X வரை) பின்பு [next] நக்ஷத்ர யுக்தாயாம்" in Tamil — so the anga-yukta sequence is complete for evening or late-morning recitations that cross the boundary.
Festivals — full 10-year horizon: Observances whose next occurrence is more than a year out (Adhika Masam intercalary months, rarer sankramanas, some tithi-yoga combinations) previously showed "Outside bundled window" even though the panchangam data goes through 2035. The horizon now searches the full bundled range, so those rows show a real date. The "outside bundled window" label still applies for genuine edge cases where a rule has no match anywhere in the bundle.
Settings — Gotra + Veda pickers: The Sankalpam Identity section's Gotra field is now a searchable list of the 24 seed gothrams (Bharadwaja, Kashyapa, Vasishta, Atri, Vishwamitra, Gautama, Jamadagni, Agastya, and 16 more), the same catalog used when picking a gothram for a Family member. The Sutra field becomes a Veda menu with the four Vedas (Rigveda, Yajurveda, Samaveda, Atharvaveda). Existing free-text values are preserved.
Version 1.8
The developer, Sadhasivasubramanian Hariharasubramanian, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
Seller
Sadhasivasubramanian Hariharasubramanian
Size
34.1 MB
Category
Lifestyle
Compatibility
Requires iOS 17.0 or later.
iPhone Requires iOS 17.0 or later.
iPad Requires iPadOS 17.0 or later.
Mac Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.