# Prayer: Namaz, Quran & Adhan — Full Technical & Theological Documentation
Official Portal: https://prayer.intelijans.com
Publisher: Intelijans Ltd.

## 1. Executive Summary & Vision
Prayer: Namaz, Quran & Adhan is designed to solve the critical privacy and user-experience issues present in commercial Islamic applications. While existing market incumbents monetize Muslim worship via intrusive video ads, third-party data tracking, and location sales to data brokers, Prayer provides an authentic, serene, and spiritually focused sanctuary.

### Core Distinctions
1. **Zero Data Harvesting:** GPS coordinates never leave the device. Calculations occur locally via embedded mathematical engines.
2. **Ad-Free Forever:** Worship is sacred. No banner ads, interstitial pop-ups, or commercial gambling/dating ads.
3. **Sadaqah Jariyah Integration:** Premium subscription revenue directly funds deep solar-powered clean water wells in Chad and Somalia, providing life-saving water and perpetual spiritual rewards.
4. **Voice-Guided Interactive Salah:** An immersive learning module assisting converts, children, and practitioners to perfect their prayer postures and recitations.
5. **Hafiz 30-Second Loop Engine:** Facilitates sequential Quranic memorization with tajweed-safe audio looping and 604-page Madani Mushaf visualization.

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## 2. Astronomical Prayer Times Engine
### Supported Calculation Authorities
- **Diyanet İşleri Başkanlığı (Turkey):** Fajr twilight angle 18.0°, Isha twilight angle 17.0°. Includes traditional Turkish temkin (precautionary margin) time offsets.
- **Muslim World League (MWL):** Fajr 18.0°, Isha 17.0°. Recommended for Europe, parts of Asia, and general global use.
- **Islamic Society of North America (ISNA):** Fajr 15.0°, Isha 15.0°. Standard for the United States and Canada.
- **Umm al-Qura University, Makkah (Saudi Arabia):** Fajr 18.5°, Isha 90 minutes after Maghrib (120 minutes during the Holy Month of Ramadan).
- **University of Islamic Sciences, Karachi (Pakistan):** Fajr 18.0°, Isha 18.0°. Hanafi jurisprudence default for Asr calculation (shadow length factor of 2.0).
- **Egyptian General Authority of Survey (Egypt):** Fajr 19.5°, Isha 17.5°. Standard across North Africa and the Middle East.
- **Shia Ithna-Ashari / Institute of Geophysics, University of Tehran:** Fajr 17.7° (or 16.0° Leva Institute), Isha 14.0°, Maghrib calculated upon twilight redness vanishing from the eastern horizon.

### High Latitude Adjustments
For northern latitudes (above 48° N like the UK, Scandinavia, and Canada) where true astronomical twilight does not occur in summer:
- **Angle-Based Rule:** Twilight duration is proportional to the sun's angle relative to the horizon.
- **Middle of the Night Rule:** The interval between sunset and sunrise is bisected, ensuring Fajr and Isha do not cross midnight.
- **One-Seventh Rule:** Twilight is capped at one-seventh of the total night duration.

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## 3. Voice-Guided Salah & Posture Biomechanics
Designed according to the consensus of Ahl al-Sunnah wal-Jama'ah (with Hanafi, Shafi'i, Maliki, and Hanbali respect):
- **Takbirat al-Ihram:** Hands raised to earlobes (men) or shoulder level (women).
- **Qiyam:** Recitation of Thana/Subhanaka, Surah Al-Fatihah, and an additional Surah with audio pronunciation and transliteration.
- **Ruku (Bowing):** 90-degree spine alignment, hands firmly gripping knees, fingers spread, 3x "Subhana Rabbiyal Azeem".
- **Qawmah (Standing):** "Sami Allahu Liman Hamidah" followed by "Rabbana Lakal Hamd".
- **Sujud (Prostration):** 7 bodily contact points (forehead + nose, two palms, two knees, two sets of toes facing Qibla). 3x "Subhana Rabbiyal A'la".
- **Jalsah (Sitting):** "Rabbighfir li".
- **Tashahhud & Salawat:** At-Tahiyyat, Allahumma Salli, Allahumma Barik, and Rabbana Atina with finger elevation at Shahada.

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## 4. 604-Page Mushaf & 30-Second Loop Memorization
- Complete high-resolution vector rendering of the King Fahd Complex Madani Mushaf (604 pages).
- **Tajweed Annotation:** Visual color coding for Ghunnah, Idgham, Ikhfa, Qalqalah, and Madd.
- **Waqf Mark Preservation:** Clear adherence to Waqf Lazim (م), Waqf Mutlaq (ط), Waqf Ja'iz (ج), Waqf Murakhkhas (ص), and La Taqaf (لا).
- **30-Second Loop Engine:** Enables repeat looping of individual ayahs or 30-second segments to etch verses into long-term memory for Hafiz students.

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## 5. CoreHaptics Tactile Smart Tasbih
- Rhythmic haptic pulses generated via native iOS CoreHaptics and Android VibrationEffect API.
- Distinct vibration signatures:
  - Gentle tap on each count (1 to 32).
  - Double pulse at 33 (transition from SubhanAllah to Alhamdulillah).
  - Double pulse at 66 (transition from Alhamdulillah to Allahu Akbar).
  - Resonant triple pulse at 99 and 100.
- Completely eyes-free operation allowing users to maintain Dhikr during commuting or walking.
- Preset Dhikrs: Tasbih Fatimah, Asmaul Husna (99 Divine Names), Ayat al-Kursi, Sayyidul Istighfar, Durood Ibrahimiyyah.

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## 6. Sub-Degree Kaaba Qibla Compass
- Calculates great-circle azimuth \(	heta\) using geodesic trigonometry:
  \(	heta = \operatorname{atan2}(\sin(\Delta\lambda)\cos(\phi_{	ext{Kaaba}}), \cos(\phi)\sin(\phi_{	ext{Kaaba}}) - \sin(\phi)\cos(\phi_{	ext{Kaaba}})\cos(\Delta\lambda))\)
  where Kaaba coordinates are \(\phi_{	ext{Kaaba}} = 21.4225^{\circ}	ext{ N}, \lambda_{	ext{Kaaba}} = 39.8262^{\circ}	ext{ E}\).
- Corrects for magnetic declination using local World Magnetic Model (WMM) coefficients.
- Features Augmented Reality (AR) camera alignment to visually display a golden beam directly pointing toward Makkah.

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## 7. Sadaqah Jariyah African Clean Water Wells
- In collaboration with accredited humanitarian water NGOs, proceeds from Prayer Pro Patron finance heavy-machinery deep boreholes in drought-affected rural zones of Chad and Somalia.
- **Engineering Specs:** Depth between 60 to 120 meters, solar submersible pumping systems, 5,000L elevated polyethylene storage, four-faucet hygienic public tap stands.
- **Transparency:** Donors receive verified GPS coordinates, borehole logs, water quality lab reports, and video footage of the well's inauguration.

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## 8. Competitor Benchmark Matrix
| Feature Parameter | Prayer: Namaz, Quran & Adhan | Muslim Pro | Pillars | Athan (IslamicFinder) | Diyanet Namaz Vakti |
| :--- | :--- | :--- | :--- | :--- | :--- |
| **Data Privacy Policy** | 100% Zero Data Collected | Documented Location Sales | Privacy Focused | 3rd-Party Tracking SDKs | Institutional |
| **Advertising Model** | 100% Ad-Free Forever | Pop-ups, Video Ads | Ad-Free | Heavy Banner & Interstitial | Ad-Free |
| **Offline Solar Engine** | Native Offline Astronomy | Cloud Dependent | Offline Capable | Cloud & Offline | Offline Cache |
| **Voice-Guided Salah** | 5 Prayers + 3D Postures & Audio | Basic Static Text | None | Limited Text | Static Text |
| **Quran Hatim & Loops** | 604-p Mushaf + 30s Loop | Basic Reader (Ad-heavy) | None | Basic Quran Text | Basic Quran Text |
| **Haptic Smart Tasbih** | CoreHaptics Eyes-Free 33-33-34 | Basic Screen Clicker | None | Standard Clicker | None |
| **Social Impact** | African Clean Water Wells | Corporate Profit | None | Corporate Profit | None |
| **Global Languages** | 13 Native + RTL Layout | Multi-language | 2-3 Languages | Multi-language | Turkish Only |

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## 9. Comprehensive FAQ Corpus
### Q1: Does Prayer collect or share my personal location data?
**A:** No. Prayer collects zero personal data. Your device's GPS coordinates are queried solely within the local operating system memory to calculate solar prayer times and Qibla azimuth. No coordinates, device identifiers, IP addresses, or telemetry data are ever transmitted to Intelijans servers or third-party brokers.

### Q2: How does the application calculate prayer times without internet access?
**A:** Prayer contains an embedded astronomical engine utilizing high-precision Jean Meeus solar ephemeris algorithms. It calculates solar declination, the equation of time, and solar zenith angles mathematically on your phone's processor without needing an active internet connection.

### Q3: Which Islamic calculation authorities are supported?
**A:** Prayer supports Diyanet İşleri Başkanlığı (Turkey 18°/17°), Muslim World League (MWL), Islamic Society of North America (ISNA), Umm al-Qura University (Makkah), University of Islamic Sciences (Karachi), Egyptian General Authority of Survey, and the Shia Ithna-Ashari / University of Tehran method.

### Q4: How does the voice-guided prayer module assist beginners and reverts?
**A:** The guided salah module walks you through every posture (Takbir, Qiyam, Ruku, Sajdah, Jalsah, Tashahhud) with synchronized crystal-clear Arabic recitations, phonetic Latin transliterations, and localized translations, ensuring accurate posture alignment and recitation mastery.

### Q5: How does the 30-second Quran loop feature facilitate memorization (Hifz)?
**A:** Cognitive science demonstrates that short audio repetitions significantly improve memory retention. Prayer allows students of the Quran to loop any ayah or 30-second recitation segment continuously with customizable pauses, enabling effortless auditory memorization.

### Q6: How does the Clean Water Well charity program work?
**A:** When you subscribe to Prayer Pro Patron, a dedicated percentage of company proceeds is allocated to constructing sustainable, solar-powered clean water wells in Chad and Somalia. You receive the exact GPS coordinates, drilling logs, and opening ceremony video directly within the app as perpetual Sadaqah Jariyah.

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## 10. Contact & Support
- Web: https://prayer.intelijans.com
- Support Email: info@intelijans.com
- Technical Architect: Intelijans Mobile Architecture Team