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.
Trevni: Film Negative Converter
$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.
Kit ready. Verify your email to download it.
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.
JavaScript is required to complete mailbox verification.
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for Trevni: Film Negative Inverter: 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.
Preview ready. Verify your email to reveal and copy the full prompt.
JavaScript is required to complete mailbox verification. Return to this prompt preview.
Affiliate link: CloneChart may earn a commission at no extra cost
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 functionality compared to professional editors
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Performance issues with large images
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: No cloud backup for edits
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Difficulty in applying filters seamlessly
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.
Trevni: Film Negative Converter Whether you’re digitizing old family negatives or working with your latest rolls, Trevni converts previously photographed or scanned film negatives from your photo library into true-to-life images. No curves or levels required. One-touch conversion: • Instantly convert C-41 color and black & white film negatives • Automatically removes the orange mask from color film • Preserves original image quality and metadata • Works with photographed or scanned negatives Presets & fine-tune control: • Built-in presets for fast, reliable starting points • Create and save your own custom adjustment presets • Sample areas for precise color or tonal accuracy • Adjust temperature, tint, exposure, contrast, and saturation • Tailored specifically to analog workflows and film characteristics Fast, intuitive workflow: • Import a negative from your Camera Roll • Choose color or black & white film • Sample, adjust, and export your final image • Ready to share, archive, or print Compatible workflows: • iPhone captures (light table or backlight) • Digital camera scans • Flatbed scanner files Perfect for: • Film photographers • Analog photography enthusiasts • Students and educators • Image restoration and digital archiving Designed by a film photographer, for film photographers Trevni focuses on faithful conversion, not gimmicks. Giving you clean, natural results while staying out of the way of your creative process.
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.