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
Gahshomar گاهشمار
گاهشمار شاهنشاهی ایران
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 5.0
8 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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What's included18 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 Gahshomar گاهشمار: 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 customize event colors and notifications.
Assumption to check: Limited customization options for events
Validate with people who use this workflow before building.
Hypothesis 2
Implement a more visual event summary or timeline.
Assumption to check: Difficult to view events at a glance
Validate with people who use this workflow before building.
Hypothesis 3
Enable synchronization with Google Calendar and Apple Calendar.
Assumption to check: Lack of integration with other calendar apps
Validate with people who use this workflow before building.
Hypothesis 4
Add customizable reminders and notifications for upcoming events.
Assumption to check: No reminders for events
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
گاهشمار شاهنشاهی ایران گاهشمار میراث گاهشماری کهن ایران را در دستان شما قرار میدهد. تاریخها را در سامانه گاهشماری شاهنشاهی مشاهده کنید که مبدأ آن به تأسیس شاهنشاهی هخامنشی توسط کوروش بزرگ در سال ۵۵۹ پیش از میلاد بازمیگردد. سامانههای گاهشماری این برنامه از سه سامانه گاهشماری پشتیبانی میکند: گاهشماری شاهنشاهی گاهشمار کهن ایرانی با مبدأ تأسیس شاهنشاهی ایران. تاریخها را همانگونه که در دوران شکوه ایران باستان شمرده میشدند تجربه کنید. هجری شمسی گاهشمار امروزی ایران بر پایه سال خورشیدی که امروزه در ایران و افغانستان استفاده میشود. میلادی گاهشمار بینالمللی که در سراسر جهان به کار میرود. ویژگیهای کلیدی تبدیل تاریخ تبدیل آسان تاریخ بین هر سه سامانه گاهشماری. هر تاریخی را به صورت شاهنشاهی، هجری شمسی یا میلادی مشاهده کنید. رویدادهای تاریخی تاریخهای مهم در تاریخ ایران را از دوران باستان تا امروز کاوش کنید. با جشنهای فرهنگی، نقاط عطف تاریخی و مراسم سنتی آشنا شوید. محتوای آموزشی تاریخ غنی پشت گاهشمار شاهنشاهی را کشف کنید: - ریشههای زرتشتی نام ماههای ایرانی - پیوند ماههای ایرانی با بروج - اهمیت جشنهای کهن ایرانی طراحی زیبا - رابط کاربری ساده و کاربرپسند - پشتیبانی از حالت تاریک و روشن - چیدمان کامل راست به چپ برای فارسی - ویجتهای صفحه اصلی برای مشاهده سریع تاریخ پشتیبانی چندزبانه به فارسی و انگلیسی با بومیسازی کامل و پشتیبانی مناسب از راست به چپ. درباره این برنامه گاهشمار یک ابزار آموزشی است که برای حفظ و ترویج میراث گاهشماری پیش از اسلام ایران طراحی شده است. گاهشمار شاهنشاهی بخش مهمی از تاریخ فرهنگی ایران را نمایندگی میکند. این برنامه یک پروژه آموزشی مستقل است و با هیچ نهاد دولتی یا سازمان سیاسی وابستگی ندارد. تمام اطلاعات تاریخی برای اهداف آموزشی ارائه شده است. گاهشمار را امروز دانلود کنید و با هزاران سال تاریخ ایران پیوند برقرار کنید. جاوید شاه Discover the Persian Imperial Calendar Gahshomar brings Iran's ancient calendrical heritage to your fingertips. View dates in the Shahenshahi (Imperial) calendar system, which traces its epoch to the founding of the Achaemenid Empire by Cyrus the Great in 559 BCE. CALENDAR SYSTEMS The app supports three calendar systems: Imperial Calendar (Shahenshahi) The ancient Persian calendar with its epoch at the founding of the Persian Empire. Experience dates as they were counted during the glory of ancient Persia. Solar Hijri (Shamsi) The modern Iranian calendar based on the solar year, widely used in Iran and Afghanistan today. Gregorian Calendar The international civil calendar used worldwide. KEY FEATURES Date Converter Seamlessly convert dates between all three calendar systems. View any date in Imperial, Solar Hijri, or Gregorian format instantly. Historical Events Explore significant dates in Iranian history, from ancient times to the present. Learn about cultural celebrations, historical milestones, and traditional observances. Educational Content Discover the rich history behind the Imperial calendar, including: - The Zoroastrian origins of Persian month names - The connection between Persian months and the zodiac - The significance of ancient Iranian festivals Beautiful Design - Clean, intuitive interface - Dark mode and light mode support - Full right-to-left (RTL) layout for Persian - Home screen widgets for quick date viewing Multilingual Support Available in English and Persian (Farsi) with complete localization and proper RTL support. ABOUT THIS APP Gahshomar is an educational tool designed to preserve and promote Iran's pre-Islamic calendrical heritage. The Imperial calendar represents an important part of Persian cultural history. This app is an independent educational project and is not affiliated with any government entity or political organization. All historical information is presented for educational purposes. Download Gahshomar today and connect with thousands of years of Persian history. Javid Shah
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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
@react-navigation/native
zustand
expo-calendar
react-native-gesture-handler
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.
