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
Cross DJ Pro - Mix & Remix
Cross DJ Pro is the perfect app to mix and perform DJ sets on the go!
$7.99 · In-app purchases
PRICE
$7.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.2
299 ratings · Top 30%
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.
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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 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 Cross DJ Pro - Mix & Remix: 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
Provide intuitive onboarding tutorials and tooltips.
Assumption to check: High learning curve for new users.
Validate with people who use this workflow before building.
Hypothesis 2
Integrate a broader range of audio sources and options for users.
Assumption to check: Limited track library and sound packs.
Validate with people who use this workflow before building.
Hypothesis 3
Optimize audio processing for smoother performance.
Assumption to check: Occasional performance issues with audio playback.
Validate with people who use this workflow before building.
Hypothesis 4
Clarify pricing and provide better trial options.
Assumption to check: In-app purchase confusion.
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
Cross DJ Pro is the perfect app to mix and perform DJ sets on the go! MIX AND PERFORM LIVE • Start your mix with the essential 2-deck DJ setup • Easily import and sort your music library by title, artist, album, BPM or length • Shape and resample your sound in real-time with Pro-grade FXs • Play with over 70 one-shot samples and 12 loops • Access your Soundcloud library to mix all the latest bangers • Synchronize your tracks with the most accurate Waveform view • Customize your setup with the color of your choice • Set the view to portrait mode for easier access while on the go • Record your mix & share it with the world! (Soundcloud etc.) OUTSTANDING AUDIO ENGINE • Import any audio file (MP3, AAC, FLAC, WAV & AIFF) • Accurate BPM detection of your music, down to the last decimal • Insanely low latency, the music reacts instantly to your actions • Realistic turntable scratch sounds • Change the BPM without affecting the tone with Keylock mode • Detect the key of the songs to know which tracks sound good together • Automatically equalize the levels of 2 tracks with Auto-gain • Sync the two tracks in the player with Auto-sync • Control EQs and crossfader with external hardware mixers • Multichannel audio for USB compliant multichannel sound cards ENJOY ADVANCED PRO-GRADE FEATURES! • Record and play your own samples • A full-fledged 3-band mixer with DJM EQ preset • Launch Loops from 8 to 1/32 • Hot cues & loops are automatically set on the beat with Quantize mode • Keep the same tempo while looping with Slip Mode • Customizable, manual pitch range (4 to 100%) and manual pitch bend • Pre-listen to tracks in your headphones before mixing them with Split audio • Cross DJ can mix your tracks & play music automatically, from any source with Automix (playlist, album, etc.) • Go live with your friends through Ableton Link • Compatible MIDI controllers: Pioneer DDJ-WeGO1&2t, Mixvibes U-Mix Control Pro I & II, Numark Mixtrack Pro I & II, Numark iDJ Live I & II, Hercules DJ Console RMX 2, Hercules DJ Control Instinct, Hercules DJ Control AIR, Vestax Spin2 ***Due to copyright reasons, recording mixes with streamed tracks from SoundCloud is not possible. THEY LOVE CROSS DJ "The best free DJ app" - Mixmag "Quality app" - Digital DJ Tips "Beautiful design & faster performance" - DJ TechTools "Clean, simple & professional look & feel" - Best-dj-software.com TERMS OF USE https://www.mixvibes.com/terms PRIVACY POLICY https://www.mixvibes.com/privacy Follow us on Instagram (@mixvibes - #crossdj) Join us on Discord (https://discord.gg/TGGtpcMN) Check out Cross DJ for desktop: https://www.mixvibes.com/cross-free-dj-software
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.
