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
HUJI FILM - Quick Shoot Camera
HUJI FILM is an application that simulates a one-time camera, It contains a lot of traditional or retro-quality negatives
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 2.6
104 ratings · Below Average
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/
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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 HUJI FILM - Quick Shoot 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
Ensure robust error handling and extensive testing before release.
Assumption to check: Low rating with many users citing bugs and crashes.
Validate with people who use this workflow before building.
Hypothesis 2
Include a comprehensive editing suite with filters and adjustments.
Assumption to check: Limited editing features compared to competitors.
Validate with people who use this workflow before building.
Hypothesis 3
Implement cloud storage options for saving and retrieving photos.
Assumption to check: No cloud backup for photos.
Validate with people who use this workflow before building.
Hypothesis 4
Clearly define premium features and offer a more transparent pricing model.
Assumption to check: In-app purchases are unclear and limited.
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
HUJI FILM is an application that simulates a one-time camera, It contains a lot of traditional or retro-quality negatives. Every time you take a photo, HUJI FILM will automatically load all kinds of films in a random way. You only need to focus on shooting, other is handed to HUJI FILM. — CLASSIC FILM CAMERA With this old disposable film camera, you can enjoy all kinds of retro negatives and add dates to your photos without any action. HUJI FILM make the photos look like the nostalgic time of the 90s, and permanently preserve every journey and memories of life. — HUJI FILM by Huji Studio® http://hujicamera.com [email protected] — STORIES HUJI Studio® was founded in the summer of 1993, through a series of apps we offer, you can save every journey and memories of your life forever. — DISCLAIMER NOTICE HUJI FILM IS PROVIDED AS HUJI STUDIO OWN PRODUCT. THIS APP IS NOT THE OFFICIAL APP OF FUJIFILM AND KODAK OR ANY OTHERS. HUJI STUDIO MADE EVERY EFFORT TO ENSURE NOT TO INFRINGE OTHER'S COPYRIGHTS OR TRADEMARKS.
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
React Native
Expo
react-navigation
expo-camera
expo-media-library
@react-native-async-storage/async-storage
BUILD KIT DIFFICULTY
Intermediate
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.
