# DrumLibrary vs 421Grid

The clearest difference is iOS requirement: DrumLibrary at 14.0 against 421Grid's 18.0. On price, update cadence, ads and in-app purchases there is nothing between them.

DrumLibrary costs $1.99 and 421Grid $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

DrumLibrary ships an update every 5 months, 421Grid every 3 months. The most recent releases landed on October 16, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | DrumLibrary | 421Grid |
| --- | --- | --- |
| Price | $1.99 | $1.99 |
| Rating | **[4.0 (13 ratings)](https://appshunter.io/ios/app/drumlibrary/id348831734/reviews)** | — |
| Number of ratings | **13** | — |
| Positive reviews | 57.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 387 MB | 4 MB |
| Requires iOS | **14.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Roel Spruit](https://appshunter.io/developer/314830521) | [N. Wheeler](https://appshunter.io/developer/312350021) |

## What reviewers say

### DrumLibrary

[App page](https://appshunter.io/ios/app/drumlibrary/id348831734)

This app provides a comprehensive collection of drumming resources, including rudiments, grooves, independence exercises, and a metronome. It aims to help drummers of all levels improve their skills and coordination.

**Highlights:** 148 Rudiments (including essential and hybrid), Over 100 Grooves (rock to famous), Audio samples for rhythm understanding, 81 Independence Exercises, Built-in Metronome, Favorite marking and custom routine creation

**Features:** Vision Pro support

**In-app purchases:** none


### 421Grid

[App page](https://appshunter.io/ios/app/421grid/id1598461370)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is DrumLibrary free?

DrumLibrary costs $1.99, with no in-app purchases.

### Is 421Grid free?

421Grid costs $1.99, with no in-app purchases.

### Do DrumLibrary or 421Grid have ads?

Neither DrumLibrary nor 421Grid shows ads.

### Which is updated more often, DrumLibrary or 421Grid?

DrumLibrary ships an update every 5 months, and 421Grid every 3 months. Most recently, DrumLibrary was updated on October 16, 2026 and 421Grid on October 15, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*