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.
wrangle those wild subscriptions, hero.
$2.99 · In-app purchases
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.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
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What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
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.
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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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for Substrack: Sub Tracker: 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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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
Assumption to check: Users often find it hard to manage multiple subscriptions.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Lack of reminders leads to missed payments.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Limited analytical insights on subscription spending.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: User onboarding can be confusing.
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
wrangle those wild subscriptions, hero. your coins are escaping into the digital void every month and you don't even know where they're going. substrack and penny the horse will be your personal finance guardian, tracking all your subscriptions in one totally algebraic place. peep your monthly and yearly totals faster than a horse at races. understand your spending by category, and reclaim your treasure hoard. awesome powers * easy subscription wrangling - add all your subscriptions with just a few taps. corral netflix, spotify, adobe, icloud, and whatever other mystical services are draining your wallet. * instant math magic - your monthly and yearly costs appear automatically. zero brain-melting required. * quick stats scrolls - get the juicy intel: average cost per subscription, total categories, yearly damage, and how much vanishes each day. * clean ui - a minimal and simple interface that won't harsh your mellow. tracking subscriptions shouldn't cause friction but better than your notes app. * fort knox privacy - your secrets stay in your device. no accounts, no creepy tracking, no annoying ads. just you and your data, chillin'. * works in the wilderness - no internet? no problem. your info lives right on your device, like a loyal sword in your inventory. perfect for adventurers like * anyone juggling multiple streaming potions, software spells, or recurring quests * coin-savers ready to banish unnecessary expenses to the abyss * budget warriors who demand to know exactly where their loot disappears to * privacy champions who want a simple, ad-free adventure substrack is so neat one righteous tool that does one thing spectacularly: helps you understand where your subscription coins are actually going. download substrack today and start your quest toward financial enlightenment.
Written user reviews are not shown here. Check current App Store reviews >
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
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.