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
Battlestation Groovebox
Battlestation is your 1-minute groovebox: a workstation designed to get an EDM jam going in less than 60 seconds.
$7.99 · In-app purchases
PRICE
$7.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.7
41 ratings · Top 15%
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
Make this idea yours
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Add to a Remix
Combine features and design from your favorite apps.
Kit ready. Verify your email to download it.
Generating… usually about a minute.
Make it yours Optional
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/
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.
JavaScript is required to complete mailbox verification.
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 Battlestation Groovebox: map the core Music 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.
Continue in Rork >
Affiliate link: CloneChart may earn a commission at no extra cost
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
Introduce more effects and customization settings for users to personalize their sound.
Assumption to check: Limited audio effects and customization options
Validate with people who use this workflow before building.
Hypothesis 2
Enhance project management features with folders or tags.
Assumption to check: Difficulties in saving and managing multiple projects
Validate with people who use this workflow before building.
Hypothesis 3
Implement a guided tutorial for new users to understand the app's features.
Assumption to check: Steep learning curve for beginners
Validate with people who use this workflow before building.
Hypothesis 4
Optimize app performance for smoother operations across various device specifications.
Assumption to check: Inconsistent performance on older devices
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
Battlestation is your 1-minute groovebox: a workstation designed to get an EDM jam going in less than 60 seconds. Note: iPad or Mac recommended. iPhone support is provided for plugin compatibility purposes, but Battlestation is best experienced on a roomy screen. Battlestation contains an analog drum machine, three synths, a mixer and a bunch of effects and utilities, all accessible from a single screen. Battlestation mixes traditional groovebox concepts with generative sequencers borrowed from the modular world, and the immediacy of a streamlined DAW-less jamming setup. Create banging techno on the bus. Lay down some acid tracks in the forest. Tinker with weird sounds on your lunch break. Battlestation targets that sweet spot between being creative and spending a few minutes doing something fun and entertaining. Although Battlestation is designed to be a self-contained, standalone casual fun box, it has a bunch of power user features built-in to make it work in your DAW setup should you want to turn your jams into tracks... - Works on iOS, iPadOS and MacOS - Loads as an AUv3 plugin in compatible plugin hosts - Separate outputs for each instrument* - MIDI IN/OUT for each instrument* - All automation parameters exposed as AU Parameters* - Does not contain AI - Handcrafted in the Netherlands * = when loaded as an AUv3 plugin Find the user manual on ruismaker.com
Written user reviews are not shown here. Check current App Store reviews >
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
Zustand
expo-av
react-navigation
@react-native-community/slider
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.
