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
mySubTracker
mySubTracker - Smart Subscription Manager with AI
$0.99 · In-app purchases
PRICE
$0.99
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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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included16 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 mySubTracker: 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 a feature to automatically pull subscription details from email or bank statements.
Assumption to check: Users often find it tedious to manually enter subscription details.
Validate with people who use this workflow before building.
Hypothesis 2
Provide notifications for upcoming payments and options to cancel subscriptions within the app.
Assumption to check: Difficulty in tracking subscription changes or cancellations.
Validate with people who use this workflow before building.
Hypothesis 3
Add analytics features to visualize spending trends related to subscriptions.
Assumption to check: Lack of detailed analytics on spending habits.
Validate with people who use this workflow before building.
Hypothesis 4
Include more payment options like Apple Pay or Google Pay for convenience.
Assumption to check: Limited payment methods for in-app purchases.
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
mySubTracker - Smart Subscription Manager with AI Take control of your subscriptions with the power of on-device AI. mySubTracker helps you track every subscription, visualize your spending, and make smarter decisions about what to keep — all without your data ever leaving your device. Features: • AI Subscription Advisor — Powered by CoreML with 88% accuracy, our on-device AI analyzes your usage patterns and proactively recommends which subscriptions to cancel, saving you money without compromising your privacy. • Track All Subscriptions — Manage every streaming service, app, gym membership, and SaaS tool in one beautiful dashboard. • Beautiful Charts & Cost Breakdown — See exactly where your money goes with interactive charts and detailed monthly, quarterly, and annual breakdowns. • Renewal Reminders — Never get caught off-guard by an unexpected charge. Get timely notifications before each renewal. • Home Screen & Lock Screen Widgets — Monitor your monthly spend at a glance, right from your home or lock screen. • 20+ Preset Templates — Add popular services instantly with one tap from our growing library of templates. • Multi-Currency Support — Track subscriptions in any currency with per-currency totals and automatic grouping. • Privacy-First — All your data is stored locally on your device. No account required, no data sent to any server. • 10 Languages — Available in English, Chinese, Japanese, Korean, Spanish, French, German, Portuguese, Russian, and Arabic. Download mySubTracker today and finally see what you're actually paying for.
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
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.
