# DSI vs Sound Control DSP

The clearest difference is update cadence: Sound Control DSP at every 2 months against DSI's every 7 months. DSI's advantage is iOS requirement (8.0 vs 11.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

DSI ships an update every 7 months, Sound Control DSP every 2 months. The most recent releases landed on September 15, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | DSI | Sound Control DSP |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (8 ratings)](https://appshunter.io/ios/app/dsi-2/id1379793450/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 57.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 38 MB | 5 MB |
| Requires iOS | **8.0** | 11.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [DD Audio](https://appshunter.io/developer/599474306) | [SEIKAKU](https://appshunter.io/developer/860317297) |

## What reviewers say

### DSI

[App page](https://appshunter.io/ios/app/dsi-2/id1379793450)

This app provides comprehensive tools to fine-tune your car audio system with a digital signal processor. It offers a straightforward interface for adjusting equalization, phase, crossover, and time alignment for optimal sound.

**Highlights:** Bluetooth 4.0 compatible, 6 customizable presets, 10-band parametric EQ per channel, Phase correction, Crossover adjustments, Time alignment, Input summing and linking

**Features:** macOS Compatibility

**In-app purchases:** none


### Sound Control DSP

[App page](https://appshunter.io/ios/app/sound-control-dsp/id6459363803)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is DSI free?

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

### Is Sound Control DSP free?

Sound Control DSP is free to download, with no in-app purchases.

### Do DSI or Sound Control DSP have ads?

Neither DSI nor Sound Control DSP shows ads.

### Which is updated more often, DSI or Sound Control DSP?

DSI ships an update every 7 months, and Sound Control DSP every 2 months. Most recently, DSI was updated on September 15, 2026 and Sound Control DSP on October 4, 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.*