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
PFA Calculator: Air Force PT
Calculate your 2026 Air Force PFA or Space Force HPA score in seconds
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.8
25 ratings · Top 5%
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 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 PFA Calculator: Air Force PT: map the core Health & Fitness workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
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App Store description
Calculate your 2026 Air Force PFA or Space Force HPA score in seconds. Enter your results to see your total score, component breakdown, and pass/fail status, with scoring based on DAFMAN/SPFMAN 36-2905. Includes HAMR training with audio cues, altitude adjustments, exemptions, event alternatives, and What If mode to see exactly where you can gain points. WHAT IT CALCULATES • Body Composition • Strength — Pushups or Hand-Release Pushups • Core — Situps or Plank • Cardio — 1.5mi Run, Shuttle (HAMR), or Walk KEY FEATURES • 2026 Score Charts — Full scoring tables built into the app. No PDFs, no guesswork. • Exemptions — Calculates adjusted scores for exempted components automatically. • Altitude Adjustment — Corrects cardio scores for your elevation. No manual lookup required. • Branch Toggle — Switch between Air Force and Space Force. Scoring adjusts automatically for PFA or HPA standards. • What If? Mode — Toggle between event alternatives and adjust values to find your highest possible score before test day. • HAMR Trainer — Audio-paced beep test with shuttle counts, level announcements, and live projected score. Plays alongside Spotify. • Saved Preferences — Your branch, age, sex, height, and waist persist between sessions for faster re-scoring. • Instant Pass/Fail — See your total score and status the moment you enter a result. BUILT FOR • Active duty USAF members (PFA / DAFMAN 36-2905) • Active duty USSF members (HPA / SPFMAN 36-2905) • Recruits prepping for their first fitness assessment • Anyone who needs a fast, accurate PT score — fast DISCLAIMER Not an official Department of the Air Force application. Always verify scores against official guidance (DAFMAN/SPFMAN 36-2905).
Written user reviews are not shown here. Check current App Store reviews >
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
Expand calculator to include more exercises and customizable routines.
Assumption to check: Limited exercise options for calculations.
Validate with people who use this workflow before building.
Hypothesis 2
Implement social sharing to motivate users.
Assumption to check: No social features for sharing scores.
Validate with people who use this workflow before building.
Hypothesis 3
Add a feature for tracking fitness progress and trends.
Assumption to check: Lack of progress tracking over time.
Validate with people who use this workflow before building.
Hypothesis 4
Enhance onboarding with tutorials on using the app effectively.
Assumption to check: Limited onboarding experience.
Validate with people who use this workflow before building.
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
Zustand
React Navigation
TypeScript
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.
