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.
App Overview
8mm Vintage Camera
8mm is so realistic it was even used to film scenes in the Oscar-winning documentary Searching for Sugar Man!
$3.99 · In-app purchases
PRICE
$3.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.6
384 ratings · Top 50%
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.
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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included17 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
Preview a sample Build Kit No email needed
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Screen plan
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.
Differentiate and validate
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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Free quick prompt For a smaller starting point
Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for 8mm Vintage Camera: 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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Opportunities
AI-GENERATED OPPORTUNITY HYPOTHESES
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
Offer more unique and customizable filters.
Assumption to check: Limited filters and effects compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Simplify navigation and enhance onboarding tutorial.
Assumption to check: User interface can be confusing for new users
Validate with people who use this workflow before building.
Hypothesis 3
Provide clearer descriptions of what each purchase includes.
Assumption to check: In-app purchases can be unclear or frustrating
Validate with people who use this workflow before building.
Hypothesis 4
Optimize image handling and reduce processing times.
Assumption to check: Performance issues when processing high-resolution images
Validate with people who use this workflow before building.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
8mm is so realistic it was even used to film scenes in the Oscar-winning documentary Searching for Sugar Man! We have established the de facto standard of real-time retro film emulation. It was featured by Apple in App of the Day, App of the Week, In the Director's Chair, App Store Essentials, etc. 8mm Vintage Camera captures the beauty and magic of old-school vintage movies right through your viewfinder. Dust and scratches, retro colors, flickering, light leaks, and even frame shake, all can be instantly added with a single tap of the finger. SHOOT BOTH PHOTOS AND VIDEOS WITH SOPHISTICATED LIVE EFFECTS • Combine effects of film color, halation, dust & scratch, film grain, and softening to create authentic old-school movies • Adjust the strength of the effects to achieve your own unique visual style • 10 Lenses (frame) effects: Projector, Vignetting, Light Leak, Color Fringing, Super 8, Screen, 16mm, Tube, color negatives of Super 8 and 16mm • 21 Retro & Aged Films: 1920, Noir, 60s, 70s, Sakura, XPro, Siena, Pela, Indigo, Tuscan, Two-Color, 2-Strip, 3X, and monochromes • Additional 21 filters that emulate real historical films and expired films - available with the 8mm Pro subscription • Jitter Button to imitate real 8mm projectors frame shakes • Sound Switch to add projector sound for extra authenticity or mute the video for a silent movie effect. • Up to 4K 30fps with original unfiltered video recording on newer devices A COMPACT EDITOR FOR MOVIE CREATION - Apply film and frame effects to clips - Trim video, pan & zoom photo - Add a soundtrack from your music library - Choose from 5 unique themes with matching titles, transitions 8MM PRO SUBSCRIPTION - You can subscribe or make a one-time purchase for unlimited access to all current filters and future updates - Start your subscription with a free 7-day trial. Once the trial is over, you’ll be charged an annual subscription fee - Your subscription will automatically renew unless auto-renew is turned off at least 24 hours before the end of the current period. You can go to your Settings > Apple ID > Subscriptions to turn auto-renew off
Written user reviews are not shown here. Check current App Store reviews >
Screenshots
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Build scope
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Define the first version
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Set boundaries
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Check the hard parts
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
SUGGESTED BUILD STACK
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BUILD KIT DIFFICULTY
Advanced
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.
