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 Travel Journal
Save your favorite spots, track your routes, and get directions in one tap.
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.7
39 ratings · Top 15%
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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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 GPS Travel Journal: 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 local storage for offline access.
Assumption to check: Limited offline functionality, hard to access entries without internet.
Validate with people who use this workflow before building.
Hypothesis 2
Enhance photo upload process with batch selection.
Assumption to check: Users find it cumbersome to upload multiple photos.
Validate with people who use this workflow before building.
Hypothesis 3
Simplify navigation with a more guided user flow.
Assumption to check: Navigation can be confusing due to multiple tabs.
Validate with people who use this workflow before building.
Hypothesis 4
Add themes or templates for journal entries.
Assumption to check: Lack of customization for journal entries.
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
Save your favorite spots, track your routes, and get directions in one tap. GPS Travel Journal is your all-in-one navigation and memory app — perfect for road trips, hikes, and cycling adventures, but just as handy for everyday life. Track your journeys, save favorite spots around town, and pull up directions to them in seconds. Key Features: * Save Locations – Save locations with notes and photos to create a vivid travel log. * Track & Record – Leave a trail of dots on the map showing every step of your adventure. * Quick Access to Saved Places – Bookmark restaurants, shops, parks, or any spot in town and get directions instantly. * Real-Time Stats – See distance, time, speed, and even fuel cost while you travel. * Remember Where You Parked – Save your parking spot with one tap. * Offline Tracking – Works anywhere with GPS, no internet required. * Route Comparison – Record and compare paths to find the fastest way to work or school. * Activity Tracking – Perfect for walking, running, cycling, or driving. * Student Drivers – Log trips with detailed distance, duration, and routes. Whether you’re exploring a new city, hiking a hidden trail, or just trying to remember where you parked, GPS Travel Journal keeps your journeys organized and unforgettable. Start turning your travels — and everyday adventures — into stories you’ll never forget.
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
react-navigation
expo-image-picker
react-native-maps
@react-native-async-storage/async-storage
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.
