# PercussionIQ vs UDBapp

The clearest difference is review sentiment: PercussionIQ at 100% against UDBapp's 38%. PercussionIQ also leads on rating (5.0 vs 3.4). UDBapp's advantage is in-app purchases (none vs 5). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. PercussionIQ sells 5 one-off in-app purchases. UDBapp asks for nothing beyond the download.

PercussionIQ holds the better App Store score, 5.0 against 3.4. Both are backed by a comparable volume of ratings — 15 and 32 respectively. Written reviews point the same way: 100% of PercussionIQ's written reviews are positive against 38% of UDBapp's.

## The numbers

| Metric | PercussionIQ | UDBapp |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (15 ratings)](https://appshunter.io/ios/app/percussioniq/id6744618184/reviews)** | [3.4 (32 ratings)](https://appshunter.io/ios/app/udbapp-powered-by-arc/id6762600003/reviews) |
| Number of ratings | 15 | **32** |
| Positive reviews | **100.0% of reviews** | 37.7% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | — | Every 6 days |
| Monetization | Free with in-app purchases | **Free** |
| Size | 55 MB | 43 MB |
| Requires iOS | 18.0 | 18.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Percussion IQ, LLC](https://appshunter.io/developer/1808479577) | [Ultimate Drill Book](https://appshunter.io/developer/1455826723) |

## What reviewers say

### PercussionIQ

[App page](https://appshunter.io/ios/app/percussioniq/id6744618184)

This app offers advanced rhythmic training for percussionists using a grid methodology and intelligent practice tools. It helps users master complex polyrhythms, metric modulations, and rhythmic patterns with interactive features and a comprehensive library.

**Highlights:** GridLab Studio for custom rhythmic grids, Metric Modulation Calculator, Drum Smart Series library, IQ Methodology training, Advanced rhythmic variations, Save and load custom grids

**Features:** Family Sharing

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PercussionIQ | $2.99 | one-time |
| DSS World Class | $9.99 | one-time |
| DSS Open Class | $9.99 | one-time |
| DSS A-Class | $9.99 | one-time |
| Drum Smart Series | $29.99 | one-time |


### UDBapp

[App page](https://appshunter.io/ios/app/udbapp-powered-by-arc/id6762600003)

This app allows users to view, edit, and manage drill formations for marching bands. It offers features for both performers and directors, including animated drills, coordinate sheets, and attendance tracking. The app supports offline access and integrates with drill design software.

**Highlights:** View drill animations from any perspective, Live updating coordinates and count sheets, Annotate directly on drills with notes, Attendance tracking and rehearsal schedules, Offline mode for drill access, Integration with drill design software

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

**In-app purchases:** none


## Frequently asked questions

### Is PercussionIQ free?

PercussionIQ is free to download, with in-app purchases available.

### Is UDBapp free?

UDBapp is free to download, with no in-app purchases.

### Which has better reviews, PercussionIQ or UDBapp?

PercussionIQ is rated higher. PercussionIQ averages 5.0 out of 5 from 15 ratings, while UDBapp averages 3.4 from 32 ratings.

### Do PercussionIQ or UDBapp have ads?

Neither PercussionIQ nor UDBapp shows ads.

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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.*