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
EMS Drip Calc
Includes
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 2.7
3 ratings · Below Average
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 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 EMS Drip Calc: map the core Medical 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
Implement input validation and clear instructions to guide users.
Assumption to check: Inaccurate calculations due to user input errors
Validate with people who use this workflow before building.
Hypothesis 2
Add additional calculators or medical resources to enhance functionality.
Assumption to check: Limited features compared to competitors
Validate with people who use this workflow before building.
Hypothesis 3
Focus on a modern, user-friendly design to improve usability.
Assumption to check: Poor user interface and experience
Validate with people who use this workflow before building.
Hypothesis 4
Offer a one-time purchase option alongside subscriptions for flexibility.
Assumption to check: Subscription model may deter casual users
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
Includes Wt conversion both kg and lbs Fluid calculations Epi drip Dopamine drip Levophen drip Vasopressin drip Medication Ideal Body weight Tidal volume No Ads Overview: EMS Drip Calc is a specialized medical application meticulously crafted for EMS practitioners in the pre-hospital environment. This powerful tool simplifies complex IV drip calculations following AHA ACLS and PALS guidelines, ensuring precise medication administration and promoting the highest quality of patient care. Key Features: -Pre-Hospital Focus: Unlike most medical apps designed for hospitals, IV Pro EMS is tailored specifically for EMS providers. We understand the unique challenges you face in the field, and our app is designed to meet those needs. -Quick and Easy Math Guides: We've eliminated the need for manual calculations. IV Pro EMS provides you with quick and easy math guides, allowing you to calculate IV drip rates effortlessly, even in high-pressure situations. -AHA, PALS, and ACLS Guidelines: Our app adheres strictly to the latest American Heart Association (AHA), Pediatric Advanced Life Support (PALS), and Advanced Cardiovascular Life Support (ACLS) guidelines. You can trust that you're delivering care in line with the best practices endorsed by these organizations. -Double-Check for Error Prevention: IV Pro EMS encourages a culture of double-checking to prevent errors. Before initiating any IV drip, our app prompts you to review your calculations, ensuring the utmost safety for your patients. -Basic Formulas Built In: We've incorporated essential formulas right into the app, eliminating the need to memorize or reference complex equations. IV Pro EMS streamlines the process, giving you more time to focus on patient care. Ad-Free and Subscription-Free: Your focus should be on patient care, not dealing with ads or subscriptions. IV Pro EMS is always ad-free and never includes in-app purchases. It's a reliable, one-time investment in your practice. Why Choose EMS Drip Calc? In the fast-paced and high-stress world of pre-hospital care, accuracy and efficiency are paramount. IV Pro EMS is your indispensable tool for precise IV drip calculations, ensuring that you deliver optimal care to your patients while adhering to the latest AHA, PALS, and ACLS guidelines. Don't leave anything to chance when it comes to IV administration. Download EMS Drip Calc today and experience the peace of mind that comes with having a trusted IV drip calculator by your sid
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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
React Native Async Storage
Formik
Expo Constants
React Native Elements
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.
