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.
lackLens is an accessible camera app built for blind, low-vision, and fully sighted people who want better selfies without needing to see the screen.
$1.99 · 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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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 Black Lens: 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: Limited filters compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Slow photo processing times
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Limited sharing options.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No batch editing feature
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.
lackLens is an accessible camera app built for blind, low-vision, and fully sighted people who want better selfies without needing to see the screen. Designed by legally blind founder Steve Johnson, BlackLens uses face detection, spoken feedback, haptics, high-contrast visuals, and automatic capture to help you frame photos confidently — whether you are using VoiceOver, shooting outdoors in bright sunlight, wearing sunglasses, doing sport, or taking a higher-quality selfie with the rear camera. ◆ AutoCapture BlackLens can automatically take a photo when faces are detected, framed, and steady. No tiny shutter button. No guessing. Just hold the camera and let the app guide the shot. ◆ Headcount Taking a group photo? Turn on Headcount, choose how many faces you expect, and BlackLens helps make sure everyone is in frame before capture. ◆ Missile Lock When AutoCapture is off, Missile Lock gives you an audio lock-on cue. A tracking tone helps you frame the shot, then a lock tone tells you when you are ready to tap or press volume to capture. ◆ Haptic Framing Feel what the camera sees. • Gentle vibration means a face is near the edge • Stronger feedback means someone may be cut off • No vibration means the framing is improving This makes it easier to angle the phone without needing to inspect the screen. ◆ Mask Mode Mask Mode turns the screen into a bold, high-contrast framing surface. It is useful for low vision, bright sunlight, rear-camera selfies, and situations where the display is hard to see. Faces appear as clear visual targets: • Green means face detected • Red means locked and ready ◆ VoiceOver-Friendly Controls When VoiceOver is active, BlackLens provides dedicated accessible controls for key actions like switching cameras and toggling Mask Mode. Headcount can be adjusted with a simple VoiceOver swipe up or down. ◆ Simple Gestures • Tap anywhere to capture manually • Swipe up or down to switch cameras • Swipe left or right to toggle Mask Mode • Press a volume button to capture ◆ Better Rear-Camera Selfies Use the higher-quality rear camera with confidence. BlackLens gives spoken, haptic, and visual feedback so you can frame yourself even when you cannot see the display. ◆ Private and Simple No accounts. No subscriptions. No tracking. Just a focused camera tool designed to help more people take better photos.
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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.