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
GPS Map Camera PRO : Timestamp
GPS Map Camera PRO : Timestamp turns your phone into a professional geotagging camera
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included16 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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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 GPS Map Camera PRO : Timestamp: 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
Implement enhanced GPS algorithms for better accuracy.
Assumption to check: Users often face issues with GPS accuracy
Validate with people who use this workflow before building.
Hypothesis 2
Add basic editing features like cropping and filters.
Assumption to check: Limited editing options for captured photos
Validate with people who use this workflow before building.
Hypothesis 3
Simplify settings UI with clear descriptions.
Assumption to check: Confusing settings layout
Validate with people who use this workflow before building.
Hypothesis 4
Introduce offline photo storage and viewing.
Assumption to check: No option for offline usage
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
GPS Map Camera PRO : Timestamp turns your phone into a professional geotagging camera. Capture photos and videos with an automatic, accurate stamp showing your GPS location, full address, an embedded map, date & time, time zone, weather and more — directly burned onto the image. Built for fieldwork: construction sites, land surveys, inspections, security and patrol, real estate, logistics, agriculture, insurance documentation and proof of presence. KEY FEATURES • GPS location stamp — latitude & longitude (Decimal or DMS) • UTM and MGRS military grid coordinates • Plus Code (Open Location Code) • Full address: street, neighborhood, district, city, country + flag • Embedded mini map (Google Hybrid / Satellite / Normal / Terrain) • Date, time and GMT time zone • Live weather: temperature, wind, humidity, pressure • Altitude, magnetic field, compass heading, GPS accuracy • Door number (street number) — optional, toggle on/off • Location QR code (scan to open the spot in maps) • Two stamp styles: Classic and Advance, fully customizable • Custom logo, person name, note and hashtags on the stamp CAMERA • Full‑screen, 4:3, 1:1 and 16:9 ratios • Front & rear camera, flash, grid, tap to focus • Self‑timer (3s / 10s) • Shutter sound + capture effect • Video recording LOCATIONS & MAP • Save manual locations by dropping a pin on the map • Range (radius) based In‑Range / Out‑of‑Range detection • "Photos on Map": see all your shots clustered on a map • One‑tap Location Share: send the photo + Google Maps link together GALLERY & REPORTS • Built‑in gallery reading directly from your device album • Swipe between photos, zoom, play videos • Multi‑select delete • Generate PDF reports from selected photos and share them PERSONALIZE • Light / Dark / System theme • Units: °C/°F, km·h/mph/m·s, Decimal/DMS • 14 languages • Toggle the brand watermark on/off • Save the original (unstamped) photo too PRIVACY FIRST Your photos and videos stay on your device. We do not upload, share or sell your content. Location is used only to build the stamp. Download GPS Map Camera PRO : Timestamp and stamp every moment with proof.
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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
expo-camera
expo-location
react-native-image-picker
zustand
expo-permissions
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.
