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
MistLens
I've always had a fondness for the Black Mist filter, especially its softening effect in highlight areas
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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 MistLens: 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
Include a wider variety of filters and regularly update the selection.
Assumption to check: Limited filter options compared to competitors.
Validate with people who use this workflow before building.
Hypothesis 2
Optimize image processing and editing algorithms for better performance.
Assumption to check: Performance issues when processing large images.
Validate with people who use this workflow before building.
Hypothesis 3
Implement batch editing to allow users to apply edits to multiple images at once.
Assumption to check: Lack of batch editing features.
Validate with people who use this workflow before building.
Hypothesis 4
Add cloud backup feature to save user edits and settings.
Assumption to check: No cloud backup for edits.
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
I've always had a fondness for the Black Mist filter, especially its softening effect in highlight areas. It makes skin look naturally translucent while retaining image texture, creating a strong cinematic feel. Many YouTubers and filmmakers often use this filter to create a warm and soft atmosphere. However, after searching the App Store extensively, I couldn't find a camera app that could display this effect *during* the shooting process. Most Black Mist filter apps on the market apply the effect post-capture, preventing you from seeing the atmospheric shift in real-time, which felt unnatural and less authentic to me. So, I decided to build it myself. After considerable technical and design refinement, MistLens was born – one of the very few mobile camera apps currently supporting real-time Black Mist filter rendering. It allows you to see that cinematic atmosphere *before* you press the shutter. MistLens is a professional camera app designed for photography enthusiasts and cinematic visual pursuers. - Real-time Black Mist filter rendering (photo & video) - Dedicated Black Mist filter parameter adjustments: Intensity, Highlight Threshold, Brightness - Rear multi-lens switching support - Modern skeuomorphic design (dual black/white themes) Support:https://donuts-sneeze-ph2.craft.me/43osHqSqva1Y7W Privacy Policy: https://donuts-sneeze-ph2.craft.me/o7fMGXyTpMIR5w Terms of Use: https://donuts-sneeze-ph2.craft.me/ygG5ztrtY5FRex
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.
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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.
