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
Tip Mule
Are you in the service industry? Do you keep track of your tips on paper? Are you not sure your company is paying you all the hours you worked? Not anymore....
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 2.3
39 ratings · Below Average
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 included17 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 Tip Mule: 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
Add features like expense tracking and budgeting.
Assumption to check: Limited functionality compared to more comprehensive finance apps.
Validate with people who use this workflow before building.
Hypothesis 2
Implement a modern design with more engaging visuals.
Assumption to check: User interface feels outdated.
Validate with people who use this workflow before building.
Hypothesis 3
Provide clearer value propositions for subscription options.
Assumption to check: In-app purchase model can be confusing.
Validate with people who use this workflow before building.
Hypothesis 4
Enhance accuracy and provide a feedback mechanism.
Assumption to check: Calculation errors reported by users.
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
Are you in the service industry? Do you keep track of your tips on paper? Are you not sure your company is paying you all the hours you worked? Not anymore.... Tip Mule is an app for the service industry. This app allows you to easily track your daily tips and hours along with beautiful analytics. ** Dashboard The dashboard provides you with an instant glimpse into the current months totals along with an activity log so you can easily identify your last entries. ** Analytics Engine The analytics engine provides a more visual insight for your viewing pleasure. You have an advanced component at your fingertips when you need it. We will be updating this portion with more slicing and dicing to give you more viewing options for the data you provide. ** Touch ID Face ID enabled. With built in Touch ID / Face ID you can guarantee only YOU know how much in tips you've made. ** Secure Cloud Your data is always secure and backup automatically, no more losing your data. ** Supports Multiple Jobs With multiple job support you can track your earnings and hours independently. ** Supports Job History With this new release you can easily add a new pay rate or new position, it keeps your history nice and tidy. ** Configurable Tip Entry We know all jobs are not created equal, so each job you have will allow you to configure the options you want to track. This app started at $.99 cents and will always be $.99 cents. You benefit from all future updates not costing you a penny more! Try it out and let us know what you think! Welcome to Tip Mule! You can follow us here: Insta. http://instagram.com/tipmuleapp fb. http://facebook.com/tipmule tw. http://twitter.com/tipmule
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
React Native
Expo
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react-native-slider
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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.
