Feature spec
Goal: Send a clear invoice after finishing a job.
- Add a client, line items, a due date, and payment instructions.
- Preview the total before exporting a PDF.
- Keep an editable draft if export fails.
App Overview
Athan: Prayer Times in USA
Prayer Times Widget:
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
47,739 ratings · Top 5%
Evidence scope: No current overall US chart position is available. Category-chart positions shown in discovery are a separate scope. Revenue is a directional model estimate, not verified earnings.
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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included17 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
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Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Screen plan
Invoice editor: Client at the top, editable line items in the middle, total and preview action at the bottom.
States: Empty draft, validation errors beside each field, exporting, and a retry action that preserves the draft.
Differentiate and validate
Hypothesis: Contractors need faster repeat invoices more than more templates.
First experiment: Test duplicating a previous job with five contractors. Watch where they hesitate before expanding the feature set.
The full kit adds a phased build plan, evidence notes, tool prompts, and implementation guidance. It is a plan for your coding agent, not a finished app.
Usage: Mechanics are fair game; never reuse the original name, branding, assets, or verbatim copy.
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Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Athan: Prayer Times in USA: map the core Reference workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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Opportunities
AI-GENERATED OPPORTUNITY HYPOTHESES
These are generated suggestions, not verified review quotations. Check current App Store reviews and speak with users before treating a possible gap as a requirement.
Hypothesis 1
Allow users to set custom prayer calculation methods.
Assumption to check: Limited customization options for prayer times
Validate with people who use this workflow before building.
Hypothesis 2
Implement user feedback for accuracy improvements.
Assumption to check: Occasional inaccuracies in prayer times
Validate with people who use this workflow before building.
Hypothesis 3
Provide user control over notification settings.
Assumption to check: Overwhelming notifications for events
Validate with people who use this workflow before building.
Hypothesis 4
Add more language options for diverse user base.
Assumption to check: Limited language support
Validate with people who use this workflow before building.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
Prayer Times Widget: Athan's Prayer Times Widget is available now to see daily Prayer Times right on your device’s home screen. It is simple, convenient and completely free for all users. Daily Goals and Streaks: Simplify your daily spiritual Islamic lifestyle with Athan. Complete the following Daily Goals and earn Hasanah: - Log Your Prayer - Listen to Al-Quran - Complete a Daily Tasbih / Dhikr - Optional Tasbih / Dhikr (Tasbih Counter) - Give Sadaqah (Optional) - Offer Nafl Prayer (Optional) - Customize Daily Goals as per your need Athan is the most trusted prayer time app for accurate Salah times and also includes features: - Prayer Times with Azan Alarm: - Athan Stories (short Islamic Videos) - Al-Quran with Audio - Dua & Athkar - Qibla finder - Menstrual Mode for Women - Islamic calendar - Tasbih Counter - Hajj and Umrah Guides Azan Alarm & Prayer Times: - Accurate prayer timings worldwide - Listen to adhan five times a day by enabling azan notifications / azan alarm - View the remaining time for each Salat & see accurate Muslim prayer times of the entire day Athan Stories (short Islamic Videos): Athan Stories is a feature where you can watch and learn new things about Islam on a daily basis through short Islamic videos. Al Quran: - Read the Holy Quran in English and other 45+ languages Translations & transliterations - Bookmark surah & ayah of your choice Quran for iPhone - Get 2 free Holy Quran themes - Shareability of any ayah from the azan app on social media - Lookup any word, surah or ayah in the search bar on Quran for iPhone - Adjust font size & switch translations and transliterations on/off Menstrual Mode for Women Athan’s Menstrual Mode is a convenient experience for women's Prayer needs. - Mark Prayers as excused - Duas you can during menstruation - Dua & Athkar reminder - Customized notifications Dua / Athkar (Supplications): - Quranic and masnoon supplications / athkar & dua - Dua of the day card to strengthen your Imaan, daily Athkar & dua - Listen to Duas with Dua Audio Tasbih Counter: - Count your daily Dhikr, Tasbihat and Wazaif with the help of Tasbih - Complete Tasbeeh e Fatima with Tasbeeh Counter - Tasbeeh Counter with dark and light color themes - User friendly Tasbeeh Counter for Azkar and Dua’s - Make Tasbihat and Azkar with Tasbih (تسبيح) counter/Dhikr Counter Qibla Finder: Integrated Qibla finder / Qibla compass / Qibla direction worldwide with the help of our Qibla finder feature Gregorian and Islamic Calendar / Hijri Calendar: - View current Islamic / Hijri & Gregorian calendar dates and Umm-al-Qura Calendar - View list of Islamic events of Hijri year PrayerBook: - Know your Salat progress - Track prayers by logging them in your personalized PrayerBook - Never miss your namaz and get notifications of namaz timings during Ramzan In-App Purchases: - Enjoy smooth Ad free experience with Athan Pro version (Monthly and Yearly Subscriptions) Note: Enable Auto settings to get the most accurate Islamic Prayer Times for your location. Second, kindly rotate your phone and make an 8 in the air in order to get accurate Qibla direction Follow us to stay connected. https://www.instagram.com/athan.app/
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Screenshots
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Build scope
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Define the first version
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Set boundaries
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Check the hard parts
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
SUGGESTED BUILD STACK
React Native
Expo
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BUILD KIT DIFFICULTY
Intermediate
From the Build Kit assessment.
A reliable timeline needs an agreed scope and a technical check. Ask your agent to estimate the phases in BUILD_PLAN.md after that review.
