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.
Point your iPhone at a location and see exactly where the sun and moon will be live in AR through the precise lens you will be shooting with
$12.99 · 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 Pontus Viewfinder: 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 editing features compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: No cloud backup options
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of user reviews or community feedback
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Monetization could be unclear
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.
Point your iPhone at a location and see exactly where the sun and moon will be live in AR through the precise lens you will be shooting with. Viewfinder combines astronomy grade solar and lunar tracking with lens accurate framing so you can scout smarter, plan your light, and arrive on set already knowing your shots. • AR SOLAR TRACKER & MOON TRACKER A live AR sun and moon overlay sits directly on the camera feed using GPS, compass, and motion data. The celestial bodies position is calculated using the NOAA algorithm based on Jean Meeus Astronomical Algorithms accurate to +/-0.01 anywhere on Earth with atmospheric refraction applied so it matches what you see. The Moon tracking is currently in Beta and I need feedback from the community to verify that it works. * Real time sun and moon disk in frame with an edge arrow when they are outside your shot * Light phase readout Golden Hour, Blue Hour etc * Sunrise, sunset, moonrise and moonset times for your exact GPS location * Time travel mode to preview any date and time * Saved frames include sun and moon position, compass bearing, altitude, light phase and timestamp • SHADEMAP Pick your location, using Apple's own data Pontus Viewfinder figures out where the shadows created by buildings will depending on an exact date and time. This feature is in beta and feedback is very welcome! • LENS ACCURATE FRAMING Pick a sensor format, focal length, and aspect ratio. Viewfinder matches the iPhone camera to that angle of view. The app automatically selects Ultra Wide, Wide, or Telephoto. • CAMERA DATABASE A professional camera database with over 600 cameras including industry systems from ARRI, RED, Sony, Canon, Blackmagic Design, Nikon, and more. Every camera includes accurate sensor size data and format classification, from Full Frame and Super 35 down to APS C, Micro Four Thirds, and Medium Format systems. Use the database to match real world cameras, compare systems, and plan framing with production level accuracy. • SENSOR SIZES Medium Format, Full Frame, Super 35, APS C, Micro Four Thirds Custom focal lengths supported, plus free focal length mode where you can set any lens value you want. • ASPECT RATIOS Cinema 2.39:1, 2.35:1, 2.00:1, 1.85:1, 16:9, 4:3, 3:2 Social 9:16, 4:5, 1:1 Anamorphic 2.39:1, 1.33x on 16:9, 2.66:1 Custom aspect ratios supported • FRAMING OVERLAY AND HUD Multiple toggleable overlays for framing and composition Revised photo data UI for clearer shooting information • SHOT LIST PROJECTS Save frames into projects, build shot lists, and export to PDF Improved PDF export formatting for production use • PHOTO DATA AND EXIF Accurate EXIF writing with GPS data embedded in captured frames Cleaner photo data interface for reviewing and managing shots • CUSTOMIZATION Custom UI colour options Improved UI scaling across devices Optimised layout for readability and consistency • BUILT FOR PROFESSIONALS Designed for cinematographers, directors, camera operators, and content creators who need a fast accurate previs tool on location. Requires iPhone with iOS 17 or later.
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.