# 421Grid — drum line exercise generator

> drum line exercise generator (iPhone/iPad app by N. Wheeler.)

- Source: https://appshunter.io/ios/app/421grid/id1598461370 (this page in markdown: same URL + `.md`)
- Developer: [N. Wheeler](https://appshunter.io/developer/312350021)
- Category: Music, Entertainment
- Price: $1.99
- Age rating: 4+
- Requires: iOS 18.0 · 4 MB
- Languages: American English
- Released: 2021-12-21
- Data updated: 2026-08-27
- User reviews in markdown: https://appshunter.io/ios/app/421grid/id1598461370/reviews.md

## What is 421Grid?

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.


## Version history (last 5 releases)

### 1.4.1 — 2025-06-05

minor bug fixes

### 1.3.3 — 2024-06-03

New Feature Alert: Master Fivelets with Our App!

Drummers, get ready to elevate your skills to a whole new level! We're thrilled to announce the latest feature in our app: Fivelets—five notes in a single beat. This innovative addition allows you to explore new rhythmic territories and expand your drumming repertoire like never before.

With Fivelets, you can:

- Create complex and captivating rhythms
- Enhance your timing and precision
- Challenge your hands and mind in exciting new ways

Whether you're looking to add a unique flair to your solos or simply want to push your boundaries, Fivelets are here to help you achieve your drumming goals.

Update your app today and start experimenting with Fivelets. Take your drumming to the next level!

Practice. Innovate. Excel.

#DrummingRevolution #Fivelets #NewFeature #GetBetter

### 1.2.5 — 2024-02-28

FIVELETS!  
Improved Audio and updated UI.

### 1.0.2 — 2022-01-06

fixed issue with flipping sticking on repeat

### 1.0.1 — 2021-12-29

fixed scroll and enhanced pattern selection

## Apps similar to 421Grid

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [pttrN for drummers](https://appshunter.io/ios/app/pttrn-for-drummers/id1217383517) | 5.0 (1) | $4.99 | Music |
| [Tritone Jazz](https://appshunter.io/ios/app/tritone-jazz/id1439040353) | 1.0 (1) | $6.99 | Music |
| [Gecko Drums](https://appshunter.io/ios/app/gecko-drums/id6761950969) | 5.0 (1) | Free | Music |
| [Drumline Designer](https://appshunter.io/ios/app/drumline-designer/id6763984962) | — | $19.99 | Music |
| [Jack the beat maker app](https://appshunter.io/ios/app/jack-the-beat-maker-app/id1168562099) | — | $1.99 | Music |
| [DrumGoat](https://appshunter.io/ios/app/drumgoat/id1114406287) | — | $1.99 | Music |

## More apps by N. Wheeler

- [Bass Line Composer](https://appshunter.io/ios/app/bass-line-composer/id541384670)
- [Ensemble Composer](https://appshunter.io/ios/app/ensemble-composer/id724167960)
- [StkCtrl](https://appshunter.io/ios/app/stkctrl/id1529211274)
- [Student of Theater](https://appshunter.io/ios/app/student-of-theater/id6743187646)

All apps by N. Wheeler: https://appshunter.io/developer/312350021

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-27.*