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
GS Salary: Federal Pay Calc
GS Pay Calculator is the fastest offline tool for U.S
$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's included15 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 GS Salary: Federal Pay Calc: map the core Finance 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
Provide real-time calculations and clear instructions.
Assumption to check: Users find salary calculators can be inaccurate or unwieldy.
Validate with people who use this workflow before building.
Hypothesis 2
Focus on a clean, minimalistic design.
Assumption to check: Many apps lack user-friendly interfaces.
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to save multiple profiles and scenarios.
Assumption to check: Limited customization options for salary inputs.
Validate with people who use this workflow before building.
Hypothesis 4
Simplify subscription options and clearly communicate benefits.
Assumption to check: In-app purchase models can be confusing.
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
GS Pay Calculator is the fastest offline tool for U.S. federal employees and USAJOBS applicants to calculate General Schedule (GS) salary, locality pay, within-grade increases (WGI), and promotion step placement using official 2026 OPM pay tables. No internet required. No data collected. Ever. 100% Private. 100% Offline. Everything stays on your device. No account, no login, no analytics, no tracking. Your grade, step, locality, and every scenario you run are never shared — not with us, not with anyone. GS Pay Calculator is the only federal salary tool built with privacy as a hard requirement, not a policy. 2026 OPM General Schedule Pay Tables All 57 locality pay areas. Base pay for GS-1 through GS-15, Steps 1–10. Rates effective January 11, 2026, per Executive Order 14368. Executive Level IV pay cap ($197,200) applied automatically where applicable. GS Salary Calculator Enter your grade, step, and locality pay area and instantly see your annual, monthly, biweekly, and hourly federal salary. Understand exactly how locality pay adjusts your OPM base pay and whether the pay cap affects your position. Locality Pay Comparison Compare two GS salary scenarios side by side — same grade across two cities, or two grades in the same locality. See the difference annually, monthly, and hourly with a clear breakdown of which scenario pays more and by how much. Within-Grade Increase (WGI) Timeline Enter your current step start date and see your full step progression from your current step to Step 10. Projected WGI dates follow official OPM waiting periods: 52 weeks for Steps 1–3, 104 weeks for Steps 4–6, and 156 weeks for Steps 7–9. See your total earnings gain and years to maximum step. GS Promotion Calculator Evaluating a USAJOBS promotion opportunity? Enter your current GS grade and step, select a target grade, and instantly calculate your new step placement using the OPM two-step jump rule (5 CFR 531.214). See your exact pay increase annually, monthly, biweekly, and hourly before you accept the offer. Designed for Federal Employees No subscriptions. No ads. No upsells. No internet connection required. Built for the specific needs of current federal employees, GS applicants, HR professionals, and anyone navigating the General Schedule pay system. Salary figures are based on official OPM data and are for informational purposes only. Results may not reflect individual agency policies, appointment types, union agreements, or pay adjustments. Consult your agency HR or payroll office for official figures. This app is not affiliated with or endorsed by the U.S. federal government or OPM.
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
Zustand
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react-native-paper
expo-analytics
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.
