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
PMP JustMath
【PMP® Calculations】
$2.99
PRICE
$2.99
No in-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.3
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 included14 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 PMP JustMath: map the core Business 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
【PMP® Calculations】 This app is primarily targeted for people, who wish to improve and reinforce the PMP® Mathematic skills. With highly professional PMP® Certification Mathematics to help you build your PMP math skills. ____________________________________________________ Special features: ●In-depth explanations of every math concept covered on the exam. - Agile's Story point, takt and velocity!? - What is aTypical/Typical?....When to use them? - How to manage EVM? - Crashing or not? how..? - What/How is the (EAC) of the project? - How tricky Lags and leads.... - ....and MORE!! ●Complete with question/answer and step-by-step solution. ●Help you mastering All PMP® Mathematic questions easily ●Forever access. ●Exam will be taken by 10 knowledge areas where contains mathematics related questions. ●360 degree PMP result assessment upon finished the exam ●Review mode to provide an intuitive interface to study ●Develop by experienced PMP Certified experts ●Dumps collected from students ●Allow students to study on the go, anywhere and anytime! _______________________________________________ Disclaimer: PMI does not endorse of otherwise sponsor this application and make no warranty, guarantee, or representation expressed or implied, as to its accuracy or content. PMI®, PMP®, PMI-ACP® and PMBOK® are registered marks of Project Management Institute, Inc. The content or information provided by this app is for reference only. NevsTops endeavors to ensure the accuracy of the information on this app. No warranty is given by NevsTops to the accuracy of the information. NevsTops shall not be liable for any loss or damages from the use of or inability to use this app, or any material contained in it, or from any action or decision taken as a result of using this app.
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 function support to include advanced equations and graphing.
Assumption to check: Limited mathematical functions compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Implement a guided tutorial for first-time users.
Assumption to check: User interface can be confusing for new users
Validate with people who use this workflow before building.
Hypothesis 3
Optimize algorithm for better performance on high-complexity calculations.
Assumption to check: Inconsistent performance on complex problems
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
Axios
React Navigation
Zustand
React Native Gesture Handler
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.
