App Overview

Serving Sizer recipe converter icon

Serving Sizer recipe converter

Creative Algorithms · Food & Drink

Easily convert recipes from one serving size to another without having to think about fraction math! ● Also convert between Metric & US measures

$0.99 · In-app purchases

PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
4.2
28 ratings · Top 30%

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

// RORK SYSTEM PROMPT
Rork plan preview for Serving Sizer recipe converter: 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

Implement a feature for adding multiple ingredients easily.

Assumption to check: Users report difficulty in managing complex recipes.

Validate with people who use this workflow before building.

Hypothesis 2

Create a dedicated Favorites screen with better organization.

Assumption to check: The app lacks an intuitive way to save and access favorites.

Validate with people who use this workflow before building.

Hypothesis 3

Allow users to define custom units and conversions.

Assumption to check: Limited customization for ingredient measurements.

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

Easily convert recipes from one serving size to another without having to think about fraction math! ● Also convert between Metric & US measures **Featured by Apple in Holiday Cooking** Scale one ingredient at a time with this lighter version—Serving Sizer™ recipe converter or convert complete recipes all at once with Serving Sizer™ Recipe Manager, which has the added advantage of repeated scaling of recipes each time the guest list changes & is sold separately. Additional version available on iPad: Recipe Manager with Serving Sizer for iPad. ● Family of 5, but favorite recipe serves 4? Scale up to 5--less leftovers than just doubling the recipe. A lifesaver especially for parents on a budget. ● Holiday dinners are always around the corner--this time the guest list is for 14. Your favorite recipe serves 6. Let Serving Sizer do the math so you make enough food. ● Dinner for 1 tonight, but you don't want 3 days of leftovers. Convert a 4 serving recipe to a 1-person meal. ● Catering a big event for 100? Scale up an 8 serving recipe for a crowd—buy and make the right amount. ● Sure, anyone can double a recipe from 4 to 8 servings, but what if 10 people are coming & you don't want to run out of meat? Serving Sizer will tell how many lbs to buy for your dinner party. ● Got a cookbook from Europe, but recipes all in metric? Serving Sizer can help here too--all calculations displayed in both Metric & US units. Converting to & from Metric & US measures requires no additional steps. Just tap on "original" serving size & read amounts in both ml & cups. FEATURES • Scale by serving size--convert ingredients for more or less people • Easy entry—select fractional amounts & units using beautifully designed sliders for fractions, volumes, weights, & items • Enter numbers of items (like eggs or tomatoes) and let Serving Sizer determine fraction needed • Scaled amounts optimized for minimum number of steps and common units, such as 1 cup & 1 Tbsp, instead of 17 tablespoons. • Double, triple, & halve buttons to convert quickly to common recipe conversions • New measurements displayed in both Metric & US measures • Supports VoiceOver APPLICATIONS + Holiday feasts where recipes are increased to serve more people + Dinner parties for non-standard number of people + Meals for one or two from larger serving sizes + Catering for crowds + Convert European based recipes into a US format or US to Metric + Great for parents cooking odd-sized servings TESTIMONIALS "TERRIFIC tool for moms"-TheiPhoneMom.com "Converts the mysterious American cup measurements in my slow cooker recipe book to something useful."-PC in the UK "I use it at holidays to try out my favorite recipes on my big family. Having it [mobile] allows me to use Serving Sizer easily in my kitchen or at my parents' house"-RP "Most of my favorite cookbooks are for 4-8 servings. Serving Sizer provides a simple way to reduce recipes for the two of us. Thanks so much for this simple tool!"-KR "Do a lot of cooking for different sized groups of people?...Not only can you quickly reduce a four serving recipe to dinner for two, but also can use recipes from other countries easily & accurately...Ideal for caterers who want to expand a smaller recipe to serving sizes for large crowds...Anyone who cooks will enjoy the convenience..."-Handheld Computing ----- Also available from Creative Algorithms: - Trip Boss™ travel manager apps, available in 4 versions. Manage travel Expenses, Budgets, Itinerary, or keep a Journal - Date Wheel™ date calculator - calculate the time between two dates in months, weeks, days, and business days. Save for future reference - Serving Sizer™ Recipe Manager - convert complete recipes all at once & save for later, organize your recipes - Tip Boss tip calculator

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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.

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From the Build Kit assessment.

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