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.
WTFDO.IO is a simple, private, offline bill reminder for busy minds.
$0.99 · 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.
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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 WTFDO.IO Simple Bill Reminder: 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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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 forget due dates, leading to late payments.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Difficulty in managing multiple bills.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Limited customization options for bill reminders.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Lack of visual insights on bill management.
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.
WTFDO.IO is a simple, private, offline bill reminder for busy minds. Helpful for people with ADHD, executive-function challenges, cognitive changes associated with ageing, carers, or anyone who simply has too much going on. All your bills in one scroll. No login. No cloud. No subscription. Just a calm, visual place to see what's coming up before it turns into stress. It also includes view-only QR sharing, so you can safely share a snapshot of your bills without giving anyone control. WHY PEOPLE USE WTFDO.IO Most people don't miss bills because they can't pay them. They miss them because: • emails get buried • paper bills end up on the fridge • PDFs hide in folders • screenshots disappear • due dates slip the mind • life gets busy WTFDO.IO solves this with one simple idea: Put all your bills in one calm place. WHAT IT DOES • Add a bill in seconds • See everything in one simple scrolling list • Swipe right to mark paid • Swipe left to dismiss • Countdown to due dates • Home Screen and Lock Screen widgets • Add screenshots without switching apps • Add notes and tags • Record short voice memos • Share bills safely (single bill or view-only QR) • Optional Face ID / Touch ID protection • 100% offline — everything stays on your device HOW QR SHARING WORKS QR sharing creates a read-only snapshot of your current bill list. If someone scans the QR code using WTFDO.IO, they can import and view your shared snapshot, but they can't edit, add or change your bills. Useful for: • sharing upcoming bills with a partner • helping a parent or family member • providing a simple overview for a carer There is no continuous syncing. The QR code is simply a snapshot at that moment. Visibility, not access. WHY PEOPLE LIKE IT WTFDO.IO reduces the effort of keeping track of bills. No searching. No clutter. No complicated finance features. • One place for everything • Visual tiles make bills easy to spot • Countdown timers show what's coming next • Notes and tags capture important details • Voice memos help when typing feels like work • Recurring bills regenerate automatically • Calm, simple and predictable design It isn't a finance app. It isn't a budgeting tool. It's simply a quiet reminder system for your bills. PRICING One-time purchase. No subscriptions. No ads. No upsells. PRIVACY Everything stays on your device. No accounts. No cloud storage. No tracking. QR sharing is always read-only and never gives anyone permission to edit your information. A NOTE FROM THE CREATOR I kept forgetting electricity, water, insurance—everything. I didn't want budgets, charts or another complicated finance app. I just wanted one calm place to remember what was due. So I built WTFDO.IO. If it helps make life a little easier, I'd love it if you told a friend. @wtfdo.io
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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.