App Overview

Cronometer: Calorie Counter icon

Cronometer: Calorie Counter

Cronometer Software Inc · Health & Fitness

Cronometer is a powerful calorie counter, nutrition tracker, and food diary designed for accuracy

Free · In-app purchases

PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
100,268 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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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/
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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 Cronometer: Calorie Counter: map the core Health & Fitness workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
            

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App evidence

Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.

Screenshots

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App Store description

Cronometer is a powerful calorie counter, nutrition tracker, and food diary designed for accuracy. Track calories, macros, fasting, and 95+ vitamins and minerals with one of the most trusted health and fitness apps available. Whether you're using Cronometer as a weight loss tracker, macro tracker or overall metabolic health tracker, you'll get clear, reliable science-backed insights into your nutrition and how it supports your goals. Unlike basic calorie counters, Cronometer is built on a curated database of more than 1.1 million verified foods, including analyzed entries for unmatched accuracy. Get precise nutrition tracking, comprehensive nutrient analysis, and reliable nutrition facts you can trust. Gain deeper nutrition insights with precision nutrition tools trusted by dietitians, healthcare professionals, and athletes worldwide. Track your nutrition with confidence • Log meals in a detailed food diary • Track calories, protein, carbs, fat, fiber, vitamins, and minerals • Monitor both macronutrients and micronutrients • Compare your intake against personalized nutrition targets Perfect for weight loss, muscle gain, and improving overall health. A smarter weight tracker • Track calories and weight loss (or gain) with deeper nutritional context • Identify nutrient gaps that may affect energy, hunger, and progress • View trends over time with charts and reports • Built for sustainable weight loss, healthy weight management, and long-term success Build healthier habits • Understand how daily choices shape your long-term health • Monitor nutrition trends over time • Set personalized targets, track your personal progress, optimize your wellness • Turn accurate nutrition data into meaningful action Connect fitness, sleep, and health • Sync with Apple Health and Apple Watch • Connect Fitbit, Garmin, Oura, Whoop, and more • Import workouts, activity, and energy expenditure • Import sleep data and explore how caffeine, alcohol, and nutrition affect sleep quality Cronometer works seamlessly as a fitness tracker and health tracker, giving you a complete picture of your wellness. Four easy ways to log food • Log meals using photo or voice logging. • AI identifies foods, estimates portions and simplifies meal tracking • Scan barcodes for free • Or search a trusted, science-backed food database Why Cronometer? Cronometer is the calorie tracker and food diary trusted by dietitians, athletes, and health professionals worldwide. It’s been featured in Healthline, Prevention, Women’s Health, Good Housekeeping, Men’s Health, CNET, Oprah and more. Upgrade to Cronometer Gold Unlock premium tools for deeper insights: • Photo & Voice Logging • Fasting Tracker • Recipe Importer • Repeat Items • Deeper insights • More options to customize • Ad-free experience • Access Crono Coach Ideal for advanced tracking, fasting, and long-term weight management. SUBSCRIPTION DETAILS Upgrade to Cronometer Gold at any time. Payment will be charged to your Apple ID at confirmation of purchase. Subscriptions automatically renew unless canceled at least 24 hours before the end of the current period. Manage or cancel your subscription in your App Store Account Settings. Terms of Use: https://cronometer.com/terms/ Privacy Policy: https://cronometer.com/privacy/

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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 advanced search filters and suggestions.

Assumption to check: Users report difficulty in finding specific foods in the database.

Validate with people who use this workflow before building.

Hypothesis 2

Simplify navigation and provide a more streamlined layout.

Assumption to check: Some users find the interface cluttered and hard to navigate.

Validate with people who use this workflow before building.

Hypothesis 3

Allow users to customize their macro tracking preferences.

Assumption to check: Limited customization options for tracking specific nutrients.

Validate with people who use this workflow before building.

Hypothesis 4

Add support for popular fitness trackers and health apps.

Assumption to check: Users want better integration with wearables.

Validate with people who use this workflow before building.

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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BUILD KIT DIFFICULTY
Advanced

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.