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.
A revolutionary way to track your meals, enhanced by AI.
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 Lifesum: AI 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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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 find it difficult to track their meals accurately.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Subscription model can be confusing with hidden costs.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Limited integration with other health apps and devices.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Users report bugs in syncing data across devices.
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.
A revolutionary way to track your meals, enhanced by AI. Welcome to a new era of nutrition tracking, tailored to your style. With the new Lifesum experience, you can choose to log your meals by snapping a photo, using your voice, typing a text or scanning a barcode. We made food tracking easy so you can make more healthy choices for your body and mind. JOIN 65 MILLION USERS ON THE PATH TO BETTER HEALTH. Health isn’t about perfection—it’s about progress. Lifesum encourages small, manageable changes that add up to lasting results. Whether it’s drinking more water, adding more fruits and veggies to your plate, or choosing healthier snacks, Lifesum celebrates every win, no matter how small. SMARTER, SIMPLER MEAL TRACKING Track your meals your way: • Snap a photo to get instant nutrition details • Speak for easy, hands-free logging • Type for more detailed tracking • Scan barcodes for fast info • Use quick tracking for simple entries TOP LIFESUM FEATURES • Calorie counter • Macro tracker and food rating • Nutrition plans for weight management and body composition • Water tracker • Fruit, vegetable and fish tracker • Meal plans with grocery lists included • Integration with fitness trackers for in-depth health monitoring • Life Score test for personalized nutrition recommendations WEIGHT MANAGEMENT AND HEALTHY EATING Whether you're looking to manage your weight, eat healthier or simply feel better in your everyday life, Lifesum provides the tools and support to make your goals achievable, sustainable and enjoyable. From balanced meal plans to specialized lifestyles like keto, paleo, or high protein, Lifesum adapts to your preferences and needs. Simply share your goals, preferences, restrictions, and activity levels, and Lifesum creates nutrition plans just for you. Lifesum also offers a massive library of delicious recipes, all crafted to help you eat smarter. BEYOND CALORIES: A COMPLETE WELNESS SOLUTION Lifesum goes beyond simple calorie counting. With its unique Life Score feature, the app evaluates your overall health based on your eating habits, hydration, and activity levels. This helps you focus on long-term well-being instead of short-term fixes. Additionally, you’ll find helpful tips and reminders to build healthy habits that last. SEAMLESS INTEGRATION WITH YOUR LIFESTYLE Connect with your favorite apps and devices to get a holistic view of your health. Sync with Apple Health to import exercise calories, weight, steps, active calories, and exercise time — and export food calories, nutrition, water, and weight back to your health profile. Connect to apps like Oura, Withings, and Runkeeper via Apple Health to bring all your health data together. Progress stays at your fingertips, making it easy to stay motivated and on track. ALL YOU NEED FOR A CUSTOMIZED EXPERIENCE • Calorie counter, with the option to adjust your daily calorie goal and add/exclude calories burned through exercise • Macro tracking and adjustable goals for carbs, protein, and fat intake • Create and save your favorite foods, recipes, meals, and exercises • Body measurement tracking (weight, waist, body fat, chest, arm, BMI) • Library of thousands of recipes with smart filters for quick results • Weekly Life Score based on nutrition and exercise measurements, so you understand where you are and what's next to build the healthiest version of you • Sync with health and fitness apps to track your steps and exercise in real time Lifesum is free to download and use with limited features. For the full Lifesum experience, we offer 1-month, 3-month, and annual Premium auto-renewing subscriptions. Payment is charged to your credit card through your iTunes account at confirmation of purchase. Subscription renews automatically unless you turn off auto-renewal in iTunes account settings or cancel your subscription at least 24 hours prior to the end of the subscription period. View our Terms & Conditions and Privacy Policy: http://api.lifesum.com/mobile-terms
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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.