App Overview

Drillbook Next Reader icon

Drillbook Next Reader

Scott Rundell · Music

Marching band and drum corps drill at your fingertips

$2.99 · In-app purchases

PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
4.1
29 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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Build Kit

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A product spec, screen plans, and build steps for your coding agent.

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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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Quick prompt

> SELECT BUILD PLATFORM:

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

// RORK SYSTEM PROMPT
Rork plan preview for Drillbook Next Reader: 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

Offer more diverse chart options and user-generated content.

Assumption to check: Limited chart variety compared to competitors

Validate with people who use this workflow before building.

Hypothesis 2

Simplify the purchase process with clear tier explanations.

Assumption to check: In-app purchases can be confusing

Validate with people who use this workflow before building.

Hypothesis 3

Add features like speed adjustment and looping.

Assumption to check: Playback controls lack advanced features

Validate with people who use this workflow before building.

Hypothesis 4

Streamline the UI with better organization and spacing.

Assumption to check: User interface can feel cluttered

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

Marching band and drum corps drill at your fingertips. See how every count and every set fits into your marching show. Follow shows created on DrillbookNext.com or Drillbook Next: Directors. Drillbook Next Reader does not create shows, only follows them "Game Changer - This app is one of the most amazing tools I have used in my years of teaching marching band. So much you can do with it, no more carrying around paper charts trying to explain what a move should look like, students can watch, step-by-step, and see their coordinates the entire way. A total game changer for my band!" - SHS Drumline "Simply the best drillbook app on the App Store - As a band director, I've fallen victim to carrying around the "large binder of charts" that the profession demands. Not any more!! Upon seeing what this app can offer, it's well worth the price, both for students and directors. Seeing every dot on the field in motion and, at any time, having the ability to click on a member and see their dot book coordinate is a massive timesaver and makes rehearsals infinitely more efficient." - NBRFWooo! "Wonderful tool for drill - Beautiful, well polished, feature rich, prefect for quickly knowing what the drill should look like and the exact coordinates for any student." - Wooky "This is the best app for reading drill - I seriously can't say enough about how well this app works. Uploading a show is simple, it updates easily, it's excellent and the developer is very responsive to issues." - Roskoski Marchers Follow your dot as your marching show develops. See how you contribute to the big picture for every count. Know your show forwards and backwards. Use a set book for any marcher in the show. Instructors Pinpoint each marcher for every count. View marcher names and color coded drill. Help students get up to speed faster. Features: Coordinates for every set and count of your marching show. Move forward and backward by counts and sets. Pinch and zoom in and out. Jump to any set or song. Play the show with tempos entered by the show creator. Marcher View flips the field. Personalized set book for each marcher. Print set cards for each marcher through Set Book Mode. Custom notes for each marcher.

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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 Navigation
Expo Audio
Axios
Supabase
React Native Gesture Handler
Redux
BUILD KIT DIFFICULTY
Intermediate

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.