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.
iMUSCLE 2 IS A HIGHLY VISUAL, 3D-BASED, AWARD-WINNING HEALTH AND FITNESS APP WITH EVERYTHING YOU NEED TO PLAN AND TRACK YOUR FITNESS PROGRAM.
$3.99 · 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 iMuscle 2 - iPhone Edition: 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: Some users find the anatomy models difficult to interact with.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Limited customization options for workouts.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Subscription model can be confusing.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Lack of social features for community engagement.
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.
iMUSCLE 2 IS A HIGHLY VISUAL, 3D-BASED, AWARD-WINNING HEALTH AND FITNESS APP WITH EVERYTHING YOU NEED TO PLAN AND TRACK YOUR FITNESS PROGRAM. ⁃Chosen by the App Store as "App of the Week" ⁃No.1 Health & Fitness app - App Store Rewind ⁃Listed as one of Tech Crunch's top 20 apps ⁃Listed as one of the best apps for weight loss by More.com PLEASE NOTE: It is currently not possible to share workouts or personal data between Apple devices and other platforms. Cross-platform compatibility is something we will be working towards in the future. WHAT THE PRESS IS SAYING: "The iMuscle app has the benefit of teaching you more about the muscles that help your body move." --- ZDnet "Anyone into sports training or rehabilitation science will immediately see the usefulness of this app." --- Tuaw "iMuscle is a high-quality, professional-grade, but user-friendly app that will help users not just work out, but do so with maximum effectiveness and minimal injury. For personal or professional use, this is a fantastic fitness tool." --- Apptudes "iMuscle is a sophisticated workout aid." --- App of the Day "iMuscle is a great option for learning to exercise and stretch specific muscles in your body." --- Lifehacker "iMuscle allows everyone from fitness junkies to work-out novices to create and maintain a personalized exercise program tailored to their specific needs." --- 148 Apps PREMIUM CONTENT: iMuscle 2 provides users with the ability to zoom into an area on our 3D human body and tap on a muscle to reveal exercises and stretches targeted to the development and/or rehabilitation of that specific muscle. Once identified, just add it to a workout. The app also features our unique animations which provide direction on how to properly perform each exercise. In addition to individual users, iMuscle 2 was designed with multiple users in mind, making it ideal for fitness instructors and physiotherapists to use with their clients. iMUSCLE 2'S TOP FEATURES ARE: ⁃Rotate and zoom-in to our real 3D model with the musculature exposed to reveal superficial and many deep muscles. - Slick new interface with easy to find workout and exercise areas featuring animated exercise icons. ⁃Over 650 high-quality 3D animated exercises and stretches for both gym and home users. -Tap muscles to find exercises associated with that muscle. ⁃Search for exercises by type, area worked or equipment used. ⁃Add customized exercises to the app database. ⁃Easily create workouts with our drag & drop feature -- with automatic prompts for set, rep and weight details. ⁃Share workouts with friends, workout partners or clients via e-mail. ⁃Sync workouts between multiple devices by backing up and restoring from iCloud. ⁃Easily track your body measurements. ⁃Track statistics for entire workouts or individual exercises. - Share your progress via e-mail, Facebook & Twitter. ⁃50+ Preset workouts. ⁃Hints and tips for every exercise. ⁃Add an unlimited amount of users. HOW TO USE: 1. To work on a particular body area, zoom into the area on our 3D model. Tap on a muscle you want to work on and a thumbnail list of all the exercises associate with that muscle will be presented. 2. Select an exercise and you'll be shown an animated 3D model performing that exercise. You'll also see a written detailed description of how to perform the exercises. Primary and secondary muscles targeted will also be highlighted. 3. Add the exercise to a workout. Enjoy your workout! 3D4MEDICAL'S COMMITMENT: We take pride in our apps at 3D4Medical and continually strive to engage with our customers. We are committed to upgrading and developing our apps and invite you to share in the development process with us. Please send recommendations and feedback to: [email protected].
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.