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.
◆ featured in the independent uk newspaper
$4.99 · 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 Bill Assistant Pro: 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 find it difficult to track multiple bills in different categories.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Notifications for reminders can be inconsistent.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Limited analytics on spending and trends.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Frequent app crashes on older devices.
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.
◆ featured in the independent uk newspaper "bill assistant will make your life easier" - appadvice.com bill assistant keeps track of your bills for you. you can see which bills are due soon, see how much you are due to pay, keep a record of your payments and have the app remind you when your bills are due. √ avoid late payment fees √ budget for your upcoming bills know what's coming and never miss a payment: √ see at a glance which bills are due within the next week or month or any time period you specify √ quickly see how much in total you are due to pay within the next week / month / etc √ be reminded with notifications of upcoming bills ◆ get assistance when making a payment: √ easily look up the payment information you need to pay your bill √ call your supplier quickly & easily from within the app √ record payment of your bills with a few taps - log when it was paid, which payment method was used, record confirmation numbers ◆ no need to enter details time after time: √ set up automatic recurring bills for suppliers who bill you at regular intervals √ no need to manually record your direct debit or standing order payments - app can automatically record payment of your recurring bills ◆ bill assistant has the flexibility you need: √ optionally record multiple payments for a single bill √ record bills where the amount due is unknown ◆ analyse your payments: √ view and filter your payment history - see how much you are spending with suppliers over any time period √ see your bill spend per category on a pie chart ◆ 'bill assistant' is highly configurable allowing you to personalise the app for your own circumstances: √ all categories are user defined √ reminders are optional on a per category basis and can be triggered at a date & time you specify √ enter your bills manually or have the app automatically generate them if you are billed at regular intervals √ record your payments manually or have the app automatically record them to allow for direct debits & standing orders ◆ this app is part of the moneybudgie finance tracking bundle. - all 4 apps work together to help you get in control of your finances. for example, you can store your bills under the categories used in the other apps; bill payments recorded with this app affect your bank account balances tracked by spending log and your budgets tracked by budgets-expense tracker, etc. buy 'bill assistant' - you will always know what bills are coming and never miss a payment !
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.