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
Tarkine Mist AUv3
Tarkine Mist is an ambient reverb and delay processor for guitar, synth, vocals, and sound design.
$5.99
PRICE
$5.99
No in-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
1 ratings · Top 5%
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.
Build your own version
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 included15 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 Tarkine Mist AUv3: map the core Music 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
Add a larger variety of sounds and presets to enhance creativity.
Assumption to check: Limited sound options and presets
Validate with people who use this workflow before building.
Hypothesis 2
Simplify the UI with tooltips and guided tours.
Assumption to check: User interface may be overwhelming for beginners
Validate with people who use this workflow before building.
Hypothesis 3
Implement features for users to share their creations.
Assumption to check: Lack of community sharing features
Validate with people who use this workflow before building.
Hypothesis 4
Provide tutorials and help resources for new users.
Assumption to check: No tutorial or help section
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
Tarkine Mist is an ambient reverb and delay processor for guitar, synth, vocals, and sound design. Build wide, cinematic spaces with smooth reverb tails, musical repeats, shimmer lift, and expressive movement controls. Use the built-in looper to capture and layer ideas quickly, then shape tone and depth without breaking creative flow. Use Tarkine Mist as: - A standalone app for live input and quick sound design. - An AUv3 effect inside compatible hosts on Mac, iPhone, and iPad. Key features: - Lush ambient reverb for spacious, pad-like tails - Musical delay section for rhythmic motion and depth - Shimmer for airy harmonic bloom - Built-in looper for fast capture and overdub layering - Tone and mix controls for dark-to-bright voicing - AUv3 extension included for host workflows - More reverbs to come... Tarkine Mist is designed for atmospheric playing, ambient composition, post-rock textures, and cinematic soundscapes
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
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zustand
react-native-reanimated
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.
