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
SubKeep – Subscription Manager
SubKeep – Subscription Manager & Bill Tracker
$1.99
PRICE
$1.99
No 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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A product spec, screen plans, and build steps for your coding agent.
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What's included
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 SubKeep – Subscription Manager: 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
Implement customizable reminders for each subscription.
Assumption to check: Users often complain about not being reminded of upcoming payments.
Validate with people who use this workflow before building.
Hypothesis 2
Provide detailed analytics and spending reports.
Assumption to check: Difficulty in tracking spending trends over time.
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to categorize subscriptions and filter by category.
Assumption to check: Limited ability to categorize subscriptions.
Validate with people who use this workflow before building.
Hypothesis 4
Integrate with financial APIs for automatic updates.
Assumption to check: Lack of integration with banking apps.
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
SubKeep – Subscription Manager & Bill Tracker Do you actually know how much you spend on recurring bills each month? SubKeep is your personal finance intelligence tool. It analyzes your recurring expenses, scores your spending habits, and identifies exactly where you're wasting money—helping you make smarter financial decisions in seconds. FINANCIAL ANALYSIS & INSIGHTS Subscription Health Score – Get a 0–100 rating based on your monthly spending habits. Waste Detector – Identify underused services and see their total yearly cost impact. Lifetime Spending – See the true cost of every service since the day you subscribed. Price Change Tracker – Get flagged immediately when a service quietly raises its rates. Savings Simulator – Visualize how much you'd save over 1, 5, or 10 years by cutting unnecessary bills. SPENDING INTELLIGENCE Subscription DNA – Discover your unique spending personality profile. AI-Powered Forecasts – Project your total spend over the next 30, 90, and 365 days. Category Breakdown – Smart grouping for Entertainment, AI Tools, Productivity, and more. Shared Bill Analysis – Calculate your true per-person cost for family or group plans. SMART CALENDAR & REMINDERS Visual Payment Calendar – See every upcoming charge mapped out by date. Payment Heatmap – A bird’s-eye view of your entire year’s billing activity. Free Trial Tracker – Never get caught off guard again; get alerted before a trial converts to a paid subscription. Step-by-Step Cancel Guides – Easy instructions to cancel Netflix, Spotify, Adobe, and more. MONTHLY REVIEW SYSTEM Quick Review – A guided monthly walk-through of every active bill. Usage Rating – Mark services as Daily, Weekly, or Never to update your Health Score. Achievements – Unlock milestones as your financial habits improve. PRIVACY FIRST No Account Required: Start tracking immediately without signing up. On-Device Storage: Your financial data never leaves your phone. Secure & Private: SubKeep does not collect, store, or share your personal data.
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
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BUILD KIT DIFFICULTY
Not assessed in a Build Kit yet.
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.
