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.
Due remembers all the things that you need so you don't have to.
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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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Generating… usually about a minute.
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 Due - Reminders & Timers: 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: Limited customization options for reminders
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: No cloud sync for reminders
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of advanced recurring reminder options
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Limited timer functionality
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.
Due remembers all the things that you need so you don't have to. Because it repeatedly reminds you of things until you act on them, it‘s impossible to forget anything. Most importantly, it's lightning-fast to set and postpone reminders, all thanks to a clever time picker and natural date parsing. KEY FEATURES 1. Persistent & Effective Auto Snooze repeatedly* notifies you of missed reminders until marked done or rescheduled. Choose between intervals of every 1, 5, 10, 15, 30 and 60 minutes. 2. Fast to Set, Fast to Postpone A time picker with 12 preset and fully customizable times lets you set due dates and postpone reminders in record time. 3. Natural Date & Time Parsing Due can also parse dates and times that you typed or dictate and offer to set the due dates and times for you. 4. Countdown Timers Precise to the second, perfect for making the perfect soft-boiled eggs, brewing your coffee and more. Set them up once and reuse them forever 5. Powerful Recurring Reminders From the simple daily and weekly reminders to the complex every-3rd-Wednesday-of-the-month kind of reminders 6. Keep in Sync** Use iCloud or Dropbox to keep your reminders and timers in sync across your iPhone, iPad and Mac. 7. Works Offline, Completely Private There is no account to sign up for. We don't store, and we can't access your reminders and timers. And you don't need internet to receive reminders. 8. Accessible to Everyone Automatically adjusts text size according to your system setting, and offers full VoiceOver support. Due is also localized in 17 languages. * By default, auto snooze repeats 5 times, and can be configured to repeat up to 10 times. Due can auto snooze any overdue items indefinitely when you launch Due or act on any of its notifications. ** Sync on Mac requires Due for Mac (sold separately) WHAT'S THAT IN-APP PURCHASE ABOUT? When you purchase Due today, you will have access to every feature in the app today—no further purchase required. You will also get access to all new features released one year from your date of purchase. The optional Due Upgrade Pass subscription allows you to continue getting access to all new features released one year *after* your date of purchase. And here's the deal: Every feature that you have unlocked will remain available to you, forever—even if you stop subscribing. Even without a subscription, you'll always receive bug-fix and compatibility updates for free. These updates add support for the latest iPhones, iPads and Apple Watches. They also help ensure that Due continues to function well on the latest versions of iOS, iPadOS and watchOS. Due has a pretty good track record with that. To illustrate: If you've purchased Due back in 2010 for your iPhone 3G running iOS 4, that very same app in 2026 is now optimized for iPhone 17 Pro Max running iOS 26. It even works on devices that didn't exist back then, such as the iPad Pro and the Apple Watch. TERMS & PRIVACY POLICY Our terms of use and privacy policy is available here: https://www.dueapp.com/terms.html COMPATIBILITY Due requires an iPhone, iPod touch or iPad running iOS 16 or later. The Watch app is a companion to the iOS app. It requires watchOS 8 (or later) and the paired iPhone to work correctly.
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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.