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
Lokimaps
Lokimaps is a Nordic topo map app for trips where a road map is not enough
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.5
2 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.
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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 included16 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 Lokimaps: 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
Enhance offline features with more detailed maps and layers.
Assumption to check: Limited offline map access
Validate with people who use this workflow before building.
Hypothesis 2
Optimize search functionality for faster results.
Assumption to check: Slow search results
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to customize map styles and themes.
Assumption to check: Lack of customization options
Validate with people who use this workflow before building.
Hypothesis 4
Ensure a consistent design language across all screens.
Assumption to check: Inconsistent user interface
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
Lokimaps is a Nordic topo map app for trips where a road map is not enough. Use it for hiking, hunting, fishing, paddling, skiing, cycling, cabin life and route planning across Finland, Sweden and Norway. Start with one included official topographic base map: Finland, Sweden or Norway. Lokimaps PRO unlocks the full map catalog, offline downloads, custom map layers and location sharing. Maps and layers - Official topographic maps for Finland, Sweden and Norway in one app - Multi-map mode for showing several base maps at once, useful near borders and during mixed-map planning - Finnish aerial imagery, historical maps from 1863-2020, property borders and nautical charts - Norwegian nautical chart raster data for coastal planning - Worldwide Thunderforest Outdoor maps based on OpenStreetMap - Your own compatible WMS/WMTS base maps and WMS/WMTS/WFS overlay layers - AI Agent support for finding compatible map services Field tools - Offline downloads for supported maps, so planned areas stay available without mobile coverage - Tracks, routes and waypoints with GPX import and export - Folders for organizing trips, routes and saved places - Ruler for measuring distance directly on the map - Base camp and point-to-point navigation back to saved places - Address, place and coordinate search with recents and autocomplete - Coordinate display, copy and search in WGS84 DD/DDM/DMS, ETRS-TM35FIN, MGRS, UTM/ETRS89, SWEREF 99 TM and ETRS-GK - Location sharing with trip companions - Oma riista hunting areas in Finland as offline map layers Notes Some maps, layers and tools require Lokimaps PRO. Continued GPS tracking in the background can reduce battery life. Nautical chart layers are provided for planning and reference only, not for navigational use. Terms of Use: https://www.lokimaps.com/terms
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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 Navigation
Expo Location
React Native Mapbox
Supabase
Zustand
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.
