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.
Simple and reliable timers to use with your XF or XF style workouts
$0.99 · 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.
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.
JavaScript is required to complete mailbox verification.
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for 4Time — XF WOD TIMER: 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.
Preview ready. Verify your email to reveal and copy the full prompt.
JavaScript is required to complete mailbox verification. Return to this prompt preview.
Affiliate link: CloneChart may earn a commission at no extra cost
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: Limited timer customization options
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Lack of workout statistics tracking
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: No social sharing options
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: In-app purchase confusion
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.
Simple and reliable timers to use with your XF or XF style workouts. 4Time contains a standard timer, countdown timer, interval timer, lap timer, and even a fully programmable tabata timer. ◦ 4Time is the only timer in the App Store that allows you to use your second iOS device as a remote control! (in-app purchase required; both devices must be running same version of iOS). ◦ All timers allow you to tap the screen to add reps (except the lap timer, which allows you to add laps), helping you or a friend to keep count while you're working out. ◦ After you complete your workout, you're automatically shown your results (if available) displaying your completed reps for each round. This makes it easy to track your workout round by round and record this data to your personal log/journal easily. ◦ Tabata Timer: Allows you to set work, rest between intervals, rest between tabatas, number of rounds, and number of tabatas -- as well as a custom name for each tabata. Everything you need! ◦ 4Time also give you access to your device's music library so you can listen to that power song to push you the extra mile! ◦ Like to be original? 4Time offers several different timer sounds for you to choose one (requires in app purchase). **************************************************** If you encounter any problems with 4Time please email us directly ([email protected]) as opposed to leaving a negative review. Be sure our responses are not being automatically placed into your "Junk" mailbox. It is difficult for us to help you when we cannot communicate back to you. We also request that you "report a problem" in the App Store. This will help us determine the cause of the problem. It also helps us and other users when we receive emails from you. Thank you : ) ****************************************************
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.