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.
AI health coach for lasting weight loss
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.
Kit ready. Verify your email to download it.
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 Simple: AI Weight Loss Coach: 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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Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
AI health coach for lasting weight loss Simple helps you lose weight with personalized plans, real-time nutrition analysis, on-demand coaching, and tailored workouts—without calorie counting or extreme restrictions. For the first time, progress actually feels fun. Think of us as the Duolingo of health: motivating, enjoyable, and surprisingly delightful. While other solutions push extremes, Simple helps you find a balance that keeps you smiling throughout your weight loss journey. Consistency, made easy. What you get with Simple An AI coach trained by experts Avo™ is your smart in-app coach, guiding you with personalized advice, motivational coaching, and science-backed strategies—anytime, anywhere. Instant food feedback with Avo Vision Snap a photo of your groceries, menu, or meal and get instant guidance, nutrition insights, and recipe ideas. No calorie math—just clear, actionable advice on the go. Easy, personalized workouts Get simple, beginner-friendly workout plans designed to match your fitness level and goals. Build strength, burn calories, and stay consistent with exercise routines you’ll actually enjoy. A real-time Success Score, designed to keep you on track Track progress in real time with your personalized Success Score. Instantly see how your choices stack up, understand where to adjust, and stay motivated as you move closer to your goals. Sustainable results without the stress Turn small daily choices into lasting habits so you can lose weight, feel better, and stay consistent without rigid dieting. Meet Blinky: your emotional support fluff Most weight loss apps give you charts and streaks. Simple gives you Blinky. He’s playful, dramatic, and impossible to ignore. Log a salad, he cheers. Log late-night fries, he’ll indulge with you while helping you get back on track. Skip logging, and he sulks—or goes full chaos. Blinky makes consistency fun: - Daily motivation—“What will Blinky say today?” - Playful accountability—reactions that keep you logging. - Streak rewards—stay consistent and earn golden Blinky. It’s accountability without the scolding. His moods keep you engaged, entertained, and coming back—making healthy habits stick and driving real weight loss. Features you’ll love - Personalized weight loss coaching from Avo™ - Photo-based nutrition feedback with Avo Vision - Beginner-friendly, personalized workout plans - Honest, playful motivation from Blinky - Quick food, water, activity, and weight logging - iOS Home Screen widget & Apple Health + Watch integration Why Simple works Weight loss isn’t about perfection—it’s about consistency. Simple makes logging easy, workouts approachable, and healthy choices fun, so you can build habits that last. That’s why people call us the “Duolingo of Health.” We turn hard work into something enjoyable, motivating, and even delightful. Where other apps feel clinical or restrictive, Simple keeps you smiling, laughing, and coming back for more. And it works. To date, Simple serves 800,000+ active subscribers, who have collectively lost more than 17.5 million pounds. With 20M+ downloads and an average 4.7-star rating, Simple ranks among the world’s top-rated wellness apps. We’ve also been recognized globally—named among the Top 100 AI Companies by the World Future Awards (2025) and awarded Best Virtual Health Coach by MedTech Breakthrough (2025). Our methods are backed by science, published in peer-reviewed journals, and presented at leading international conferences. For further information, please visit https://support.apple.com/en-gb/HT202039. Privacy Policy: https://simple.life/privacy.htm Terms and Conditions: https://simple.life/tos/
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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 meal logging tedious and time-consuming.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: AI responses can sometimes be generic and unhelpful.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Users struggle to track long-term progress effectively.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Limited social features for motivation.
Validate with people who use this workflow before building.
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.