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
GeoPosition
Convert GPS coordinates to map coordinates in a twinkling
$6.99 · In-app purchases
PRICE
$6.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 1.0
1 ratings · Below Average
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.
Build your own version
Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included15 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 GeoPosition: map the core Navigation 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
Ensure a polished UI with thorough testing before launch.
Assumption to check: The app has a low rating due to poor user interface and bugs.
Validate with people who use this workflow before building.
Hypothesis 2
Integrate reliable mapping services for better accuracy.
Assumption to check: Users report inaccurate location data.
Validate with people who use this workflow before building.
Hypothesis 3
Incorporate offline maps and caching for improved usability.
Assumption to check: Limited offline functionality.
Validate with people who use this workflow before building.
Hypothesis 4
Implement advanced voice navigation with TTS for user convenience.
Assumption to check: Lack of voice navigation features.
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
Convert GPS coordinates to map coordinates in a twinkling Never get lost again! With GeoPosition you know always exactly where you are. Within a second you convert GPS coordinates received by your iPhone to popular map projection coordinate systems like UTM/UPS, Mercator, Gauss/Krüger, MGRS, GGRS87, LUREF, Swiss Grid CH1903+/LV95, CH1903/LV03-M and vice versa. GeoPostion supports in addition to the reference datum WGS84 more than 280 map datums. So you determine exactly your current position on a map. GeoPosition is most helpful for private usage (hiking, biking, traveling) as well as for professional application types (fire brigade, rescue service). With this professional tool you get 100% exact results without much effort and you easily find your way. With the additional features like sending the coordinates via E-Mail or SMS you may arrange meetings with your friends or call for help in emergencies. The App provides the following features: • Conversion from geographic coordinates to map projection coordinates and vice versa • Display and conversion of the current location received by the location service of the device • Display the coordinate on Google Maps view • Entering the coordinate by moving the pin on the Google Maps view • Sending the coordinate via E-Mail or SMS. • When the coordinate is received via E-Mail, GeoPosition or Google Maps may be started tapping on the embedded link in the E-Mail
Written user reviews are not shown here. Check current App Store reviews >
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
React Navigation
@react-native-community/masked-view
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.
