# DS18 DSP vs Marts Digital

The clearest difference is review sentiment: DS18 DSP at 100% against Marts Digital's 0%. DS18 DSP also leads on rating (4.2 vs 2.2) and update cadence (every 2 days vs every 17 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

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

DS18 DSP holds the better App Store score, 4.2 against 2.2. Both are backed by a comparable volume of ratings — 5 and 12 respectively. Written reviews point the same way: 100% of DS18 DSP's written reviews are positive against 0% of Marts Digital's.

DS18 DSP ships an update every 2 days, Marts Digital every 17 months. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | DS18 DSP | Marts Digital |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (5 ratings)](https://appshunter.io/ios/app/ds18-dsp/id1625944939/reviews)** | [2.2 (12 ratings)](https://appshunter.io/ios/app/marts-digital/id6738837858/reviews) |
| Number of ratings | 5 | **12** |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 17 months |
| Monetization | Free | Free |
| Size | 76 MB | 59 MB |
| Requires iOS | **12.0** | 12.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SPIRIT LLC](https://appshunter.io/developer/1327651109) | [Guang Dong Sound Power](https://appshunter.io/developer/1760446092) |

## What reviewers say

### DS18 DSP

[App page](https://appshunter.io/ios/app/ds18-dsp/id1625944939)

Control specific digital sound processor models with a smartphone or tablet. Adjust channels, gain, crossovers, limiters, and equalization in real-time. Features a demo mode for learning and battery/limiter monitoring.

**Highlights:** Channels Routing, General and Channels Gain, Crossover Settings, Limiter Control, Input/Output Equalizer, Time Alignment, Configurable Memories

**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 DS18 DSP free?

DS18 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.

### Which has better reviews, DS18 DSP or Marts Digital?

DS18 DSP is rated higher. DS18 DSP averages 4.2 out of 5 from 5 ratings, while Marts Digital averages 2.2 from 12 ratings.

### Do DS18 DSP or Marts Digital have ads?

Neither DS18 DSP nor Marts Digital shows ads.

### Which is updated more often, DS18 DSP or Marts Digital?

DS18 DSP ships an update every 2 days, and Marts Digital every 17 months. Most recently, DS18 DSP was updated on November 3, 2026 and Marts Digital on October 30, 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.*