# EDSP4 vs Material Removal Rate

The clearest difference is price: EDSP4 at Free against Material Removal Rate's $1.99. EDSP4 also leads on iOS requirement (9.0 vs 16.2). Material Removal Rate's advantage is update cadence (every 8 months vs every 19 months). On ads, in-app purchases and device support there is nothing between them.

EDSP4 is free to download; Material Removal Rate costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

EDSP4 ships an update every 19 months, Material Removal Rate every 8 months. The most recent releases landed on October 11, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | EDSP4 | Material Removal Rate |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 19 months | **Every 8 months** |
| Monetization | Free | — |
| Size | 51 MB | 3 MB |
| Requires iOS | **9.0** | 16.2 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Cheng Pu Chiang](https://appshunter.io/developer/1427247397) | [Vladislav Zhirnov](https://appshunter.io/developer/1476188065) |

## What reviewers say

### EDSP4

[App page](https://appshunter.io/ios/app/edsp4-31bt/id1462558049)

A convenient and professional tuning app with Bluetooth 4.0 support. It offers 6 sound effect modes and 31-band EQ adjustment for a unique audio experience. The interface includes a player that supports USB playback.

**Highlights:** Bluetooth 4.0 connectivity, 6 built-in sound effect modes, 31-band equalizer adjustment, Player interface, USB playback support

**Features:** macOS Compatibility

**In-app purchases:** none


### Material Removal Rate

[App page](https://appshunter.io/ios/app/material-removal-rate/id6503178665)

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

**In-app purchases:** none


## Frequently asked questions

### Is EDSP4 free?

EDSP4 is free to download, with no in-app purchases.

### Is Material Removal Rate free?

Material Removal Rate costs $1.99, with no in-app purchases.

### Do EDSP4 or Material Removal Rate have ads?

Neither EDSP4 nor Material Removal Rate shows ads.

### Which is updated more often, EDSP4 or Material Removal Rate?

EDSP4 ships an update every 19 months, and Material Removal Rate every 8 months. Most recently, EDSP4 was updated on October 11, 2026 and Material Removal Rate on October 18, 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.*