421Grid
drum line exercise generator
$1.99 · Designed for iPad
Push your chops to the limit with advanced rudiment tools, tempo control, and exercise customization.
Turn Practice into Progress. Inspiration into Execution.
Whether you’re a drumline veteran, music educator, or aspiring percussionist, this app is your personal drumming lab—designed to help you experiment, customize, and level up your chops with precision.
Built for Rudimental Drummers Who Want More
Forget flipping through old notebooks or searching YouTube for exercises you can’t customize. With this app, you can build your own practice grids, apply the legendary 4-2-1 structure, and modify exercises using accents, subdivisions (triplets, fivelets, sixteenths), or even alternate stickings—all with just a few taps.
Customize Everything
Shift the beat. Change the direction. Reverse your sticking. Or layer complexity to push your brain and hands to the limit. Every exercise becomes your own.
Designed for Students and Educators
Music teachers: Quickly generate custom warmups or technique builders for your drumline. Students: Practice smarter, not just harder—with structured routines and unlimited variations.
Why Drummers Are Calling This a Game-Changer:
• Reinforces fundamentals through creative repetition
• Encourages daily practice through customization and challenge
• Perfect for drumline auditions, solo prep, or just sharpening your hands
• No internet? No problem. Train anywhere you take your sticks.
Ready to Break Through Your Plateaus?
This isn’t just another drumming app. It’s your creative practice engine, your daily workout, and your edge over the competition.
Download now and redefine your rudimental journey.
Ratings & Reviews
This app hasn’t received enough ratings or reviews to display an overview.
minor bug fixes
The developer, N. Wheeler, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Nicholas Wheeler
- Size
- 3.7 MB
- Category
- Music
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - iPad
Requires iPadOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2025 Telephonic Amusements LLC
