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
Studio Field
Studio Field is a powerful companion for your Teenage Engineering devices — manage, back up, transfer, organize, and preview your content from iPhone or iPad
$19.99 · In-app purchases
PRICE
$19.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
4 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.
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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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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 included19 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 Studio Field: 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 extensive customization options for each instrument.
Assumption to check: Limited features for instrument customization
Validate with people who use this workflow before building.
Hypothesis 2
Allow users to invite others to collaborate on projects.
Assumption to check: No collaboration features
Validate with people who use this workflow before building.
Hypothesis 3
Introduce a free trial period for users to explore features before purchase.
Assumption to check: High initial cost without trial
Validate with people who use this workflow before building.
Hypothesis 4
Enable users to share their projects on social media directly from the app.
Assumption to check: No social sharing options
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
Studio Field is a powerful companion for your Teenage Engineering devices — manage, back up, transfer, organize, and preview your content from iPhone or iPad. Studio Field for Mac is included with your purchase. Connect over USB, keep libraries and backups in sync with your Mac through private iCloud, and work without a laptop when you’re on the move. OP‑1 FIELD • Connect over USB‑C • Browse tapes and copy a complete tape to your iPhone or iPad (four WAV tracks, tape.json, readme.txt) • Send downloaded tapes back as new tape folders — existing device content is never overwritten • Full device backup and restore, with the same iCloud backup list as on Mac • Preview tapes with multitrack playback, mute, solo and tape speed • Searchable offline Field manual • Optional iCloud Library sync with Studio Field for Mac OP–XY • Connect over USB‑C to import and send projects, samples and presets • Browse your OP–XY library on iPhone — same profile as the Mac Library • Full backup and restore, synced to iCloud on demand • Record stereo USB audio from OP–XY and sync takes with Mac • Searchable offline OP–XY manual OP‑1 ORIGINAL • Connect over USB • Browse tape, synth, drum and album on the mounted disk • Save folders to the original Library, or send Library items back to the reel, album sides, or synth/drum user keys • Convert an original Library tape to OP-1 field without touching the device • Full-disk backup and restore, same original profile as on Mac • Searchable offline OP-1 original manual OP‑Z • Connect over USB‑C • Browse projects, samplepacks, bounces and config • Save to the OP-Z Library, or send projects, samplepacks and config back • Full-disk backup and restore, same OP-Z profile as on Mac • Searchable offline OP-Z manual LIBRARY & ICLOUD • Local + iCloud for device libraries and backups • Download only what you need — nothing is removed from your Mac • Same OP‑1 field, OP–XY, OP-1 original and OP-Z lists as Studio Field for Mac • Share tapes, albums and recordings through AirDrop, Files, Mail and more INCLUDED: STUDIO FIELD FOR MAC Your purchase unlocks Studio Field for Mac — the full desktop companion for supported TE devices: live device status, browse and preview, whole‑device backups, local Library with optional iCloud sync, sample pack install, and safe rename / delete / import / export (read‑only until you confirm). PLAYGROUND (BUILT‑IN SOUND LAB) When you don’t have hardware connected, sketch ideas with drums, bass, ambient synth and a microphone sampler. Direct USB features require a supported device, a data-capable USB‑C cable, and the correct USB transfer mode on the connected device. Playground and Library features work without external hardware. Lithium ehf. is an independent developer and is not affiliated with, endorsed by or connected to Teenage Engineering. “OP‑1,” “OP‑1 Field,” “OP–XY,” “OP‑Z,” “EP‑133” and “Teenage Engineering” are trademarks of their respective owners. https://studiofield.app/privacy https://studiofield.app/terms
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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 Navigation
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.
