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.
This is the official Sleep Machine ® app
$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 Sleep Machine: 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 sound options compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Occasional crashes during playback
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: User interface feels outdated
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Lack of social features for sharing sounds
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.
This is the official Sleep Machine ® app. " Simply the best customizable, white noise, ambient sounds, sleep app available today"! Featuring the best professionally mastered ambient sounds, music, and tones, to assist with Stress Relief, Relaxation, and Restful Sleep. Easily Combine your choice of professionally recorded sounds with adjustable Volume, Balance, and Pitch to customize your personal relaxation environment. Our huge assortment of exclusive Sleep Machine ® sounds collection has been mastered to achieve the ultimate sleep & relaxation experience. All sounds are included ! Does not require any additional downloads ! No " In App Purchase " or " Subscription " required ! • Reduce stress and helps you relax • Blocks unwanted sounds and distractions • Calm Babies as they drift peacefully off to sleep. • Perfect for masking Tinnitus • Enhance your Meditation,Yoga, and Spa sessions with your favorite ambient mix. • Low frequency sounds for blocking loud distant noises At home or away join the Millions of people world wide who choose Sleep Machine ® to Rest, Relax, and Restore Body and Mind! Sleep Machine has been featured on CNN, USA Today, RoadWarriors.com, NPR, Lifehacker, HealthTap, AppBuddy.com, & many more! APP Features: • 103 Professionally Mastered Stereo Ambient Sounds including Rain, Fan, Beach, Furnace, and more ! • 14 Brainwave / Binaural Beats sounds too ! • Background audio playback support. Listen to Sleep Machine mixes when using other apps. • Easy sound mix abilities. Create, Save, Sort, and Name for easy mix access. • Full iTunes Music integration to mix in your favorite music. • Enjoy the beautiful & easy interface to create a truly lifelike sound experience. • Individual Volume, Balance, and Pitch adjustment for sounds, music, and tones. • Millions of Mix possibilities ! • Includes 14 preset mixes. • Advanced Alarm features including slow sound fade in & Auto Sleep Cycle Info • Wake to your favorite sounds, mixes, or iTunes Music too! • 15 additional alarm sounds. • Silence Timer for setting sound playback duration to fade out your favorite mix. User Reviews: " I am completely addicted to this application, and use this to sleep better every night. I live in a big city, and we have an often-crying newborn baby in the apartment next door. We plug into a logitech speaker unit and use the fan noise to sleep more soundly every night. " " I've tried a few sleep apps and feel that Sleep Machine is the best for me. I enjoy the various quality sounds and the ability to combine them to fit my mood. It's even good just to unwind with for a few minutes. Very soothing! " " I love this app! combining different sounds gives you an experience that you can't get from traditional, more expensive sound machine. also, I love that you can save your combinations! and, you can set a timer and then it just goes off. fan-friggin-tastic! buy this! " " This is a great little app. I especially like the ability to mix sounds, each with their own level control. I use it quite a bit because it's very good for masking noise at any time of the day. " Download Sleep Machine ® today, and change your life overnight with a deep restorative sleep!
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.