App Overview

PercussionTutor icon

PercussionTutor

FunkyDrumTutor · Music

MODERN DRUMMER MAGAZINE (October 2015 issue):

$14.99 · In-app purchases

PRICE
$14.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
4.9
267 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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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/
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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 PercussionTutor: 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

Incorporate game-like elements and challenges to increase user engagement.

Assumption to check: Limited interactivity and gamification to engage users.

Validate with people who use this workflow before building.

Hypothesis 2

Offer a freemium model with limited features to attract more users.

Assumption to check: High price point may deter potential users.

Validate with people who use this workflow before building.

Hypothesis 3

Add social sharing options to enhance user experience and community.

Assumption to check: Lack of social features for sharing progress.

Validate with people who use this workflow before building.

Hypothesis 4

Implement an offline mode for downloaded lessons for users to practice anytime.

Assumption to check: No offline access to lessons.

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

MODERN DRUMMER MAGAZINE (October 2015 issue): “This is a must-have for anyone wanting an encyclopedia of world percussion rhythms at their fingertips.” PercussionTutor is an educational app for dedicated world percussion enthusiasts. The app and its free companion book feature a unique library of world rhythms and instruments played by leading percussionists and drummers. A time stretching feature and a metronome give the users the option to practice at their own pace. NO IN-APP PURCHASES! Make sure to buy the app now and get all the future content for free. We will release updates on a regular basis adding new rhythms and videos. Damian Erskine (bassist, educator, writer for NoTreble.com): “PercussionTutor is truly fantastic and a blast to play along with”. (full review on NoTreble.com) Lincoln Goines (electric and acoustic bassist) writes: “This app is an engaging and informative way to check out the original funk. A great tool for musicians, dancers, and all lovers of rhythm”. Percussive Arts Society: “The interactive application is very thorough [...]. Navigation is simple and the layout is logical and easy to grasp.” PercussionTutor will allow you to approach South American, Caribbean and West African music in a different way. This app offers you more than a simple play-along. It includes standard notation, videos and specific claves. We also took the outmost care to capture the natural feeling of all those drumming traditions. For the batá rhythms we even developed a random playback engine that will simulate an actual batá performance. This app puts you in a live playing situation - just like you learned your mother language. You will sound more natural and more alive and you will awaken to new rhythmic possibilities. It's also a great tool for other musicians, dancers and performers who want to immerse themselves into centuries-old traditional languages. FEATURES: - Over 80 rhythms (some rhythms include a basic and a more advanced version) - Rhythms from Cuba, Brazil, Puerto Rico, Peru, West Africa, ... - ALL drums can be turned on and off individually - audio time-stretching feature - 59 videos - over 50 percussion instruments - Sheets of all the rhythms included in the app and in the free book - A description of all the rhythms - MORE RHYTMS COMING: we are working on a lot more content to be released on a regular basis! FEATURED MUSICIANS: * Louis Bauzo, performed with Tito Puente, Dizzy Gillespie, Paul Simon * Greg Askew, performed with Tito Puente * Luiz Ebert * Jérôme Goldschmidt, performed with Tito Puente, M. Santamaria & Chico O’Farrill * Marcos Napa, performed with Perú N. * M. Monaco, performed with Al Di Meola * Oswald Simmonds * Reynaldo Alcantara * Richard Byrd, performed with Babatunde Olatunji * Rudy Walker, performed with Pharaoh Saunders, Randy Weston * Victor Rendón, performed with M. Santamaria, Xavier Cugat Orchestra FEATURED RHYTHMS: **Cuba - Popular Music** - Afro - Bolero - Cha Cha Cha - Mozambique - Pachanga - Pilon - Salsa 1, 2, 3, 4 - Songo 1, 2 & 3 - Timba **Cuba - Folk Music** - Abakua Havana - Afra - Agüeito - Azogano Part 1, 2 - Columbia Part 1 - Conga - Guaguanco - Guiro - Iyesa - Makuta - Mozambique - Palo - Yambu - Yuca **Cuba - Batá Drums** - Lalubanche - Latopa - Ogun - Auguere (part 1) - Auguere (part 2) - Imbaloke - Babaluaye (part 1) - Babaluaye (part 2) - Kuru Kurubete - Ewe Masiboroñu - Borotitilawa - Dada - Oggue - Agayu Part 1,2,3 & 4 - Oferere - Ibejis - Akete Obba - Odudua - Iya Mase - Yacota - Ñongo - Chachalokafun - Iyesa - Echu - Olokun **Spain - Flamenco** - Bulerías - Soleá por Bulerías - Tangos **Brazil** - Baião - Bossa Nova - Samba Batucada - Samba Enredo - Samba Pagode - Samba Reggae - Xaxado **Dominican Republic** - Jaleo - Merengue - Pambiche **Puerto Rico** - Xica - Holandes & Holandes fast version - Plena **Peru** - Festejo - Zamacueca - Vals Peruano - Lando - Afro **West Africa** - Fanga - Saa - Lamban - Sounou

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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.