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
Astrological Charts Pro
Astrological Charts Pro is a professional astrological program for iOS, which reports 12 types of astrological charts, contains, besides planets, 20 asteroids and 24 fictitious points, including trans-Neptunian, and s...
$35.99 · In-app purchases
PRICE
$35.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.6
14 ratings · Top 50%
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/
Preview a sample Build Kit No email needed
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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Free quick prompt For a smaller starting point
Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Astrological Charts Pro: map the core Lifestyle 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 chart styles and themes.
Assumption to check: Limited customization options for charts
Validate with people who use this workflow before building.
Hypothesis 2
Simplify navigation with clearer paths to important features.
Assumption to check: Complex navigation structure
Validate with people who use this workflow before building.
Hypothesis 3
Optimize app performance for a wider range of devices.
Assumption to check: Inconsistent performance on older devices
Validate with people who use this workflow before building.
Hypothesis 4
Introduce a free tier with basic features to attract more users.
Assumption to check: High price point without a free tier
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
Astrological Charts Pro is a professional astrological program for iOS, which reports 12 types of astrological charts, contains, besides planets, 20 asteroids and 24 fictitious points, including trans-Neptunian, and several lots. App contains essential and accidental scores table with the ability to customize the order of values calculation. There is a choice of 12 house systems, 24 types of aspect with customizable orbs and database of about 100000 places with specified time zones, so the difference with GMT is determined automatically, besides, you can add new place. The program calculates exact dates of triggering aspects, periods of aspects by orb, moments of sign changes, lunar phases, lunar days, eclipses, void of course Moon, midpoints and planetary hours. There are Tropical and Sidereal zodiac in program. You can find fixed stars here. There are interpretations of natal planets in zodiac signs, houses and retrograde state, transit planets in natal houses, natal aspects, transit-natal aspects, synastry aspects, ascendent and natal houses in signs in app. !!!!!!!!!!!!!!!!!!!!!!!!!!! This program not only contains longitude, but data such as latitude, speed, declination and parallels aspects for 10 planets. !!!!!!!!!!!!!!!!!!!!!!!!!!! Chart types: 1) Transit/Natal 2) Natal + Transit 3) Synastry (by selected natal data 1 and 2) 4) Secondary Progressions (natal chart + 1 day = 1 year delta between selected natal data and specified transit data) 5) Zodiacal Directions (natal chart + 1° = 1 year delta between selected natal data and specified transit data) 6) Directions for Arcs of the Sun, the Moon or a planet (natal chart + planet distance traveled in degrees for 1 day = 1 year delta between selected natal data and specified transit data) 7) Profections (natal chart + 30° = 1 year delta between selected natal data and specified transit data) 8) Returns of the Sun, Moon, Mercury, Venus, Mars, Jupiter or Saturn (by selected natal data and specified transit data from which return dates are calculated) 9) Lunar Phase (by selected natal data and specified transit data from which return dates are calculated) 10) Composite (by selected natal data 1 and 2) 11) Middle (by selected natal data 1 and 2) 12) Harmonics (by selected natal data or specified transit data)
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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
Axios
Zustand
React Navigation
TypeScript
BUILD KIT DIFFICULTY
Advanced
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.
