App Overview

BigTipper™ icon

BigTipper™

PureBlend Software · Food & Drink

BigTipper is the fastest, easiest way to calculate restaurant tips, split the bill among your group, photograph the bill, save to the app’s History, and quickly send beautiful Meal Expense Reports.

$1.99 · In-app purchases

PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
4.9
135 ratings · Top 5%

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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A product spec, screen plans, and build steps for your coding agent.

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What's included16 files

A product spec, phased build plan, differentiation notes, and screen references.

  • START_HERE
  • AGENTS
  • EVIDENCE
  • SPEC
  • BUILD_PLAN
  • DIFFERENTIATION
  • skills/
  • screens/
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Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.

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.

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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Quick prompt

> SELECT BUILD PLATFORM:

Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.

// RORK SYSTEM PROMPT
Rork plan preview for BigTipper™: map the core Food & Drink 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

Allow users to set custom tip percentages.

Assumption to check: Limited customization options for tips.

Validate with people who use this workflow before building.

Hypothesis 2

Implement a history feature for saved tips.

Assumption to check: No ability to save or view past calculations.

Validate with people who use this workflow before building.

Hypothesis 3

Enhance settings layout for easier adjustments.

Assumption to check: Lack of user-friendly interface for settings.

Validate with people who use this workflow before building.

Hypothesis 4

Improve calculation algorithms and provide tips on rounding.

Assumption to check: Sometimes inaccurate calculations.

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

BigTipper is the fastest, easiest way to calculate restaurant tips, split the bill among your group, photograph the bill, save to the app’s History, and quickly send beautiful Meal Expense Reports. When the waiter delivers your bill, just type the amount into BigTipper’s bright blue display, and view the results instantly. As you type, BigTipper continuously calculates the tip amount and totals the bill. Quickly set the tip percentage with the slider control at the top of the screen-- without the need to type any numbers. In fact, you may never have to enter the tip percentage again because BigTipper remembers your preference. If you’re dining with friends, use the other slider control to set how many ways you’d like to split the bill. BigTipper automatically calculates each party’s share. To make it easier for each friend to pay with cash, tap the “round” button to round each party’s share to an even amount. BigTipper adjusts the tip accordingly. For those who prefer the keypad over slider controls: tap the TIP or SPLIT display, then enter values using BigTipper’s keypad (the active display is always highlighted in blue). Or set a preference to use dedicated buttons instead of sliders. Save the transaction to the app’s History with the tap of a button. BigTipper uses GPS to find the restaurant name and address. You can optionally add notes to the history, and take pictures of the paper bill, the meal, or members of your party. Best of all, BigTipper quickly generates and sends Meal Expense Reports, complete with pictures and notes. BigTipper is international-- properly displaying currency symbols, thousands separators, and decimal points for your country or locale. FEATURES • Builds and sends beautiful Meal Expense Reports • History: saves transactions with optional comments and photos • Elegant design with easy-to-read displays • Fast data entry with built-in, oversized keypad • Tip and Split slider/button controls to reduce typing • Customizable interface (choose buttons or sliders) • Sales tax support • Rounding function (on either total or just the tip) • Mirroring function: helps detect credit card slip tampering • Drink calculations (so non-drinkers don’t overpay) • All values are remembered between uses • Automatic calculation; no need to tap an equals key • GPS finds restaurant name and address for history and reports • International currency formatting • Costs less than a drink! REQUIREMENTS • iOS 12+ • iPhone, iPad, or iPod touch

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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 Navigation
Expo
React Native Elements
Axios
React Native Slider
BUILD KIT DIFFICULTY
Starter

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.