App Overview

DM1 for iPhone icon

DM1 for iPhone

Fingerlab · Music

DM1 is an advanced vintage Drum Machine

$4.99 · In-app purchases

PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
4.1
79 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.

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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/
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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.

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.

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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> SELECT BUILD PLATFORM:

Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.

// RORK SYSTEM PROMPT
Rork plan preview for DM1 for iPhone: 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 more extensive sample editing features.

Assumption to check: Limited sound customization options

Validate with people who use this workflow before building.

Hypothesis 2

Simplify the layout and improve user onboarding.

Assumption to check: User interface can be overwhelming

Validate with people who use this workflow before building.

Hypothesis 3

Integrate a platform for sharing beats and kits among users.

Assumption to check: Lack of community sharing features

Validate with people who use this workflow before building.

Hypothesis 4

Enable offline access to saved kits and sequences.

Assumption to check: No offline functionality

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

DM1 is an advanced vintage Drum Machine. It turns your iPhone into a fun and creative beat making machine. Easy and fast to use, loaded with 154 superb electronic drum kits and beautiful hyper-realistic graphics, DM1 has been designed for a lot of instant fun. As electronic musicians ourselves, we, at Fingerlab, have developed DM1 with the intention of delivering the perfect mix between fun playability and powerful sonic capacities. We always keep in mind the importance of a beautiful design with the right balance of powerful abilities while avoiding clumsy, overbusy interfaces. Check our 154 electronic drum kits. 42 classic vintage drum kits plus 112 in-house produced electronic kits, edited and mastered at Fingerlab professional studio. DM1 offers 5 main sections: 1 - THE STEP SEQUENCER frees your imagination with a smart use of the multi-touch screen. Just turn on and off steps in your sequence with the tip of your fingers to create cool beats, or unexpected rhythms! 2 - THE DRUM PADS simply lets you play and record the beat that tickles your fingers. No need to be a first-class drummer, automatic quantize does the work for you. 3 - THE MIXER for quick and subtle sound mixing of your drum kits. Featuring settings for volume, pitch, sample length, custom drum kit element for each channel, mute and solo mode. 4 - THE FX TRACKPADS a creative FX trackpad to distort, modulate and transform your beats. The effects include: Overdrive, Delay, Reverb, Phaser, Formant, Dalek, Filter, Compressor, Envelope follower, Dub Delay, Texturizer, Robotizer, and Noise Gate. 5 - THE SONG COMPOSER allows you to quickly make a song with the beat patterns you have created. Just drag and drop the patterns onto the timeline. Fast and easy. Specifications: - Retina Display - Graphic design by Jonas Eriksson - Smart ergonomy for fast creativity and fun - 108 vintage and produced drum kits, mastered at in-house Fingerlab Sound Studios - 48 additional drum kits available with In-App Purchases - Instrument mode allowing to add bassline, chord and melody - 3 instruments: Piano, Korg MicroPreset and Cello Strings - 3 other instrument (Clavinet, Marimba, MiniLogue) are available with In-App Purchases - Step Sequencer with multi-touch matrix - Mixer page with pitch, length and level rotary controls, pan controls, and custom drum kit per channel - 9 Drum pads, quantized recording - FX Trackpad for real-time sonic destruction - 16 or 32 Steps per patterns - The Randomizer tool - Extra fast drum kit loading - Playable pattern selection for extra creativity - Mode song with intuitive editing - High-quality export to SoundCloud, DropBox, Email, iTunes shared folder, AudioCopy or any other apps - Audio background mode - Audiobus support - Import & Export your song project (DropBox, Mail, iTunes folder) - Full Midi implementation - Inter-App Audio support Watch DM1 video trailer on YouTube Fingerlab's channel: http://www.youtube.com/fingerlab Feel free to let us know what you think and what you'd like to see in the next DM1 update. Enjoy! Watch us : vimeo.com/ fingerlab Visit us : fingerlab.net Follow us : twitter.com/ fingerlab Contact us : [email protected] Powered by Fingerlab http://www.fingerlab.net

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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.

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BUILD KIT DIFFICULTY
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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.