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
SHERPA: Offline Survival
SHERPA: Offline Survival Guide
$4.99 · In-app purchases
PRICE
$4.99
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/
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 SHERPA: Offline Survival: map the core Reference 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 all guides are fully downloadable and accessible offline.
Assumption to check: Limited offline functionality in survival apps
Validate with people who use this workflow before building.
Hypothesis 2
Implement an advanced search with filters for better user experience.
Assumption to check: Poor search functionality in reference apps
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to save favorite guides and create custom lists.
Assumption to check: Lack of personalization options
Validate with people who use this workflow before building.
Hypothesis 4
Provide clear value with exclusive content and features to justify subscription pricing.
Assumption to check: High subscription costs with low perceived value
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
SHERPA: Offline Survival Guide No signal. No account. No required cloud. SHERPA keeps emergency guidance, survival tools, and verified reference content on your iPhone, so it remains useful when networks fail. OFFLINE AI AND SEARCH On supported iPhones, SHERPA can use Apple Foundation Models on device with the local survival knowledge base. On every supported iPhone, fast offline search and curated protocols remain available without internet. 600+ VERIFIED SURVIVAL ARTICLES Public-domain and open-license sources: U.S. Army survival manuals, FEMA readiness guidance, CDC/EPA safety protocols, WHO references, and other official material. Topics include first aid, water, shelter, fire, navigation, disasters, dangerous animals, psychology, and preparedness. 25 PRACTICAL TOOLS Compass, SOS flashlight, Morse code, whistle, barometer, star chart, AR star map, sun position, sun path, water purification, rationing, wind chill, dehydration assessment, altitude sickness, GPS coordinates, bearing/distance, unit converter, timers, knots, signal guide, level, decibel meter, fall detector, moon phase, and more. EMERGENCY FEATURES • Emergency numbers for 70+ countries • Phrasebook in 25+ languages • QR Medical ID and ICE card • Bluetooth mesh chat • Visual communication cards • SOS broadcaster: flashlight + audio + screen PRIVACY FIRST No Data Collected. No accounts. No tracking. No servers. Sensitive medical and family plan data stays on your device. BATTERY AWARE Dark mode by default, survival battery mode, brightness controls for QR Medical ID, and guidance for keeping your phone alive longer in an emergency. SHERPA is not a replacement for emergency services, medical care, or professional rescue. In emergencies, call your local emergency number whenever possible. Built by Trimonkey (TRISIMIO SL) — Madrid, Spain.
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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
Zustand
Supabase
React Navigation
react-native-vector-icons
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.
