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.
KEV is the #1 White Balance app.
$2.99 · 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 White Balance Meter AI - KEV: map the core Photo & Video 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: Users report difficulty using the camera features in varying lighting conditions.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Some users find the subscription model confusing.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: The app sometimes crashes when saving photos after adjustments.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Limited editing options after capturing photos.
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.
KEV is the #1 White Balance app. KEV app turns your iPhone or iPad into a professional and easy-to-use light meter. Using KEV app is as easy as pie, no sensor required, the in-built camera already got you covered. Minimalist KEV uses AI to analyze live previews and provide accurate white balance data in Kelvin, making it a valuable tool for photographers and videographers. Trying to get the perfect White Balance on your DSLR can be annoying. KEV helps you by letting you know what the White Balance should be. You can measure the colour temperature of a light source in Kelvin without having to spend hundreds of dollars on professional devices. We calibrated KEV using Sekonic C-700R-U SpectroMaster Colour Meter, and we guarantee from fair to almost 100% accuracy. Just open the KEV app and point the camera on surface or scene. The white balance is a correction of color rendition to make the picture from the camera sensor as similar to the perception by human eyes as possible. Functions and Capabilities: • Gets you Color Temperature in Kelvin in real-time. • Ability to compensate and calculate the white balance readings. • Capture a snapshot with color temperature reading and location. • Ability to manually focus on the scene and objects. • Minimal yet integral point and shoot capability. • A go-to spectrometer for photographers, videographers, cinematographers, gaffers, drones and action cameras. • Save time in post-processing. • Mount your iPhone using hot-shoe over the camera or on a tripod stand and get colour temperature data on the KEV Watch app. • Zoom in to get colour temperature data of a close-range. • Balance Color Temperature of the Ambient Light and Your Light Source. Override the Auto-White Balance and choose settings yourself. Check out these videos shared by KEV users: Karl Weinreich - https://youtu.be/sT78ajMQ4Iw rileyphotos - https://youtu.be/C4oihcY7Dh4 We care about your privacy: https://kevwb.app/privacy/ If you'd like to contact, please send us an email at [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.