# DSP vs Marts Digital

The clearest difference is update cadence: DSP at every 5 months against Marts Digital's every 17 months. 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.

DSP ships an update every 5 months, Marts Digital every 17 months. The most recent releases landed on October 7, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | DSP | Marts Digital |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.2 (12 ratings)](https://appshunter.io/ios/app/marts-digital/id6738837858/reviews)** |
| Number of ratings | — | **12** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 17 months |
| Monetization | — | Free |
| Size | 7 MB | 59 MB |
| Requires iOS | **12.0** | 12.2 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [明武 伍](https://appshunter.io/developer/1622511470) | [Guang Dong Sound Power](https://appshunter.io/developer/1760446092) |

## What reviewers say

### DSP

[App page](https://appshunter.io/ios/app/dsp-480/id6474292838)

**Features:** macOS Compatibility

**In-app purchases:** none


### Marts Digital

[App page](https://appshunter.io/ios/app/marts-digital/id6738837858)

This application allows users to debug car audio devices by adjusting various parameters via a Bluetooth connection. It provides a digital interface for fine-tuning audio settings directly from a smartphone.

**Highlights:** Car audio device debugging, Bluetooth parameter adjustment, Digital interface for audio settings, Smartphone control

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is DSP free?

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

### Is Marts Digital free?

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

### Do DSP or Marts Digital have ads?

Neither DSP nor Marts Digital shows ads.

### Which is updated more often, DSP or Marts Digital?

DSP ships an update every 5 months, and Marts Digital every 17 months. Most recently, DSP was updated on October 7, 2026 and Marts Digital on October 28, 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.*