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
Gradekeeper for iPhone
Gradekeeper makes dealing with grades easy!
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.9
7 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'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 Gradekeeper for iPhone: map the core Productivity 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
Allow users to create custom grading scales and weightings.
Assumption to check: Limited customization options for grading scales
Validate with people who use this workflow before building.
Hypothesis 2
Implement cloud sync to access grades across devices.
Assumption to check: No cloud sync feature
Validate with people who use this workflow before building.
Hypothesis 3
Enhance UI with modern design patterns and animations.
Assumption to check: Basic UI design
Validate with people who use this workflow before building.
Hypothesis 4
Add notification reminders for upcoming assignments.
Assumption to check: Lack of reminders for assignments
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
Gradekeeper makes dealing with grades easy! Thousands of teachers use Gradekeeper to manage their grades. Now you can use Gradekeeper on your iPhone. With Gradekeeper for iPhone, you can: - Create new classes right on your iPhone - Open existing classes from your Dropbox - Copy existing classes to your iPhone using iTunes file sharing - Import student rosters from a text or csv file - Email or print individual student progress reports - Add new assignments and scores - Take attendance - Take attendance using the seating chart - Assign seats or make a new seating chart - Set up your school year to use semesters, trimesters, quarters, or six terms - Set up assignment categories and weights - Compute grades using total points or category weights - Set up your own letter grades and percents If you have questions, you can email me by tapping About when in the files view and then tapping the email button. Your feedback will help make Gradekeeper better!
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
TypeScript
React Query
Async Storage
date-fns
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.
