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
Groic : Listen music togther
With Groic, you can listen to music and radio with your friends anytime and anywhere! Listen to your favorite music and chat with your friends in real time.
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.6
36 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.
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's included18 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 Groic : Listen music togther: map the core Entertainment 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
Integrate with popular music APIs for a wider selection.
Assumption to check: Limited music library compared to larger platforms
Validate with people who use this workflow before building.
Hypothesis 2
Simplify UI components and enhance usability.
Assumption to check: User interface can be cluttered
Validate with people who use this workflow before building.
Hypothesis 3
Implement adaptive bitrate streaming for better performance.
Assumption to check: Inconsistent audio quality for live streaming
Validate with people who use this workflow before building.
Hypothesis 4
Add features like chat and reactions during listening sessions.
Assumption to check: Limited social features
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
With Groic, you can listen to music and radio with your friends anytime and anywhere! Listen to your favorite music and chat with your friends in real time. This app does *not* require you to have Spotify Premium or Apple Music. -Listen to music with your friends. -Listen to various radios. -You can listen to music around the world. .-You can create and share your own music collection. -chat with your friends in real time. -Search for any songs you might be interested in. -You can also upload your own songs, and many more With Groic, you can listen to millions of songs and radio stations with your friends, all for free. Discover the top charts from your country and various genres. Groic is the best way to chat in real time while listening to music, users can search for any song, play radio, or play their own uploaded songs. Users can save any song they want in the library for easy play next time. ● No advertisements between songs, stream music without interruption. ● You can save and upload your own songs in the library ● You can search for any song around the globe. ● Listen to songs from any genre. ● You can stream from various radios ● When the song will end, Groic will play similar songs for your non-stop entertainment. Groic is a service to listen to your favorite music and radio with friends. Groic Premium Provides: Monthly: $0.99 Half-Yearly: $2.99 Yearly: $3:99 Payments and Renewal: Payment will be charged to iTunes Account at confirmation of purchase. Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. Account will be charged for renewal within 24-hours prior to the end of the current period. You can manage or turn off auto-renew in your Account settings at any time after purchase No cancellation of the current subscription is allowed during the active period. Terms of use: https://sites.google.com/view/groic/terms-of-use Privacy policy: https://sites.google.com/view/groic/privacy-policy
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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
Supabase
zustand
react-native-reanimated
expo-av
BUILD KIT DIFFICULTY
Expert
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.
