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.
Welcome to fatsecret, the easiest to use calorie counter and most effective weight loss and dieting app on the market
Free · 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.
First kit free with a verified email
Combine features and design from your favorite apps.
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Generating… usually about a minute.
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 Calorie Counter by fatsecret: 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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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 often find food databases incomplete or inaccurate.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: The app may feel overwhelming for new users.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: In-app purchase prompts can be intrusive.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Limited social features for sharing progress.
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.
Welcome to fatsecret, the easiest to use calorie counter and most effective weight loss and dieting app on the market. Best of all, fatsecret is free. The app is customized for US foods and brands. Keep track of your food, exercise and weight, using the world's highest quality food and nutrition database and connect with a global community of people looking to make a change for the better and start losing weight and achieve your goals the healthy way. The app is available on Apple Watch and supports terrific Complications for your watch faces. The app is fully integrated with the Health app which lets you share your data with other Health connected apps. In particular you can: - sync your Health app calories burned and steps in fatsecret - add all your foods and their detailed nutritional information to the Health app - sync your weight to the Health app fatsecret is fast, simple to use and includes integration with external tools and services to help you succeed with your diet: - An easy to use food diary to plan and keep track of what you're eating. - A wonderful community that's ready to provide support and turbo charge your weight loss. - Image recognition of foods, meals and products so you can take photos with the camera and track nutrition with pictures. - A barcode scanner and auto-complete functions. - Health app, and Fitbit exercise tracking integration. - An exercise diary to record all the calories you burn. - A diet calendar to see your calories consumed and burned. - A weight tracker. - Detailed reporting and goals for all your calories and macros. - Photo album. #Photodiet #Foodsnap #Instacalorie - A journal to record your progress. - Reminders for meals, weigh-ins and journals. - Notifications for support, comments and followers. - Fantastic recipes and meal ideas. - Sharing and interacting with your professional of choice. - Sign in with Apple, Facebook and Google login. The app syncs with fatsecret Professional, the most convenient way to share your food, exercise and weight with your preferred health professional. Your health professional will get free access to simple and powerful tools to monitor your performance and provide you with feedback, advice and support. You can also sync your account online to access your info anywhere, any time. Premium subscriptions are available for enhanced features to help you achieve your diet and weight management goals. Premium users get: - Nutritional meal plans created by our dietitian specifically for different diet preferences and calorie goals (Keto Style, Balanced, Mediterranean, Intermittent Fasting, High Protein Low Carb) - Advanced Meal Planning: plan ahead and know in advance how many calories each meal contains - Custom Meal Headings: Six additional meal types that allow you to spread your food intake across multiple points in the day - Water Tracking: so you can make sure you reach a daily water intake goal If you choose to upgrade to fatsecret Premium, we offer a range of subscription options, including monthly, quarterly, or annually. Payment will be charged through your iTunes account at confirmation of purchase. Subscription renews automatically unless cancelled at least 24 hours prior to the end of the subscription period at the same price and subscription type you previously purchased. Subscriptions can be managed through your iTunes account after purchase. It is not possible to refund or cancel a subscription during the period. Terms of Use: https://www.fatsecret.com/Default.aspx?pa=tnc We hope you'll love Calorie Counter by fatsecret. We are constantly working to improve the app and welcome user feedback.
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.