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
OilField iHandbook
OilField iHandbook application made for all specialist who are involved in Oil & Gas exploration and drilling
$1.99 · In-app purchases
PRICE
$1.99
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's included13 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 OilField iHandbook: 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
Include a community-driven content update feature.
Assumption to check: Limited content updates and information depth
Validate with people who use this workflow before building.
Hypothesis 2
Implement a more intuitive tab navigation.
Assumption to check: Poor navigation experience
Validate with people who use this workflow before building.
Hypothesis 3
Enhance search with filters and suggestions.
Assumption to check: Inadequate search functionality
Validate with people who use this workflow before building.
Hypothesis 4
Add user accounts and bookmarking features.
Assumption to check: Lack of user engagement 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
OilField iHandbook application made for all specialist who are involved in Oil & Gas exploration and drilling. OilField iHandbook has most useful calculations which are using in daily Drilling and Oilfield operations. Also this application is the good supporting tool for oilfield Engineers. Application builded by last updated API (American Petroleum Institute) Data. Tested on oilfield of: US,Canada,UAE,Oman. P.S.: Quick Calculation - Safe Operation Time. The app uses formulas from Drilling Data Handbook (IFP Publications). OilField iHandbook. include: * Annular Volume; * Annular Velocity; * Buoyancy Factor; * Equivalent Circulating Density; * Formation Fracture Gradient; * Hydraulic Horse Power; * Mud Gradient; * Pipe Displacement; * Pump Outputs; * True Vertical Depth; * Well Hydrostatic Pressure; * Kill Weight Mud; The following units are supported: * Inches or Millimeters; * Feet or Metres; * Barrels or Cubic Meters; * PPG or SG; * PSI or kPa; Please email us on [email protected] for clarifications or corrections. Good Luck in Your Job...
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
Supabase
React Navigation
Axios
React Native Paper
BUILD KIT DIFFICULTY
Starter
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.
