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.
- Reviews -
$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.
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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 Round 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.
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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: Limited features for tracking workout progress.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Lack of social features for sharing workouts.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Missing customization options for timer sounds and notifications.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: User interface may feel outdated.
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.
- Reviews - "I've been using the Round Timer app on my iPhone for about as long as I've had my Iphone... If you're someone that's training for rounds, doing circuit work, etc. this app is worth your 99 cents. With the level of customization you get, the app is competitive with the way more expensive round timer devices that can cost upwards of $10-100." - by Shawn Lord, www.mastersdivision.com "I found a GREAT interval timer app in the iTunes store for 99 cents!!! It's called Round Timer and it works like a dream!!!" - by Miss Lee, forums on thecathenation.com "Its a really useful applications. Beats carrying around that big round timer from the old days." - by Michael Manna, T4Show.com ----------------------------------- - Description - The Round Timer was the first round/sparring/boxing timer available in the AppStore and, as a result, the most refined and stable. Don't be fooled by knock-offs (other developers copying our interface and layout). The Round Timer is a convenient round/boxing/sparring timer for your iPhone/iPod touch, now compatible with iOS 8. The Round Timer is a fully functional round/sparring timer that allows you to customize the length of the rounds, warning bell and resting period. Each of these intervals can be configured separately up to an hour. It will run in the background even if you switch to another App. With the sound themes, you can choose which alarm sounds to use: boxing/MMA, a relaxing Zen theme, and a few others. Don't like any of the dozens of preinstalled sounds? Don't worry! You can record your own sounds. For large, loud environments you can plug your device into a stereo, or for small sessions put it in the corner of the mat. The Round Timer is great for any sparring or interval training: boxing, MMA, grappling / bjj, martial arts, yoga, meditation, crossfit, exercise, workout, stretching, etc. Working out to music is not a problem. Start your music playing in the iPod app, then start RoundTimer. The sounds will play over top of your music without interrupting it. Please feel free to e-mail [email protected] to suggest new sound themes! Interested in interval training (Tabata, symmetrical, etc... intervals)? Check out our "IntervalTimer". Want more control? Check out "UltraTimer". Want full programmability and randomized intervals? Look at "UltraTrainer".
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.