# DSI vs CA AMP

The clearest difference is rating: CA AMP at 4.0 against DSI's 3.0. CA AMP also leads on ratings volume (6 vs 2). DSI's advantage is iOS requirement (9.0 vs 11.0). On price, update cadence, 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.

CA AMP holds the better App Store score, 4.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 6 respectively.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 9, 2026 and June 3, 2026 respectively.

## The numbers

| Metric | DSI | CA AMP |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/dsi-3/id1544985377/reviews) | **[4.0 (6 ratings)](https://appshunter.io/ios/app/ca-amp/id1554205982/reviews)** |
| Number of ratings | 2 | **6** |
| Positive reviews | — | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | Free |
| Size | 12 MB | 20 MB |
| Requires iOS | **9.0** | 11.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DD Audio](https://appshunter.io/developer/599474306) | [文栋 顾](https://appshunter.io/developer/1460789214) |

## What reviewers say

### DSI

[App page](https://appshunter.io/ios/app/dsi-3/id1544985377)

This application allows users to fine-tune their car audio systems using a digital signal processor. It offers comprehensive controls for equalization, crossovers, time alignment, and more, suitable for both professionals and enthusiasts.

**Highlights:** Bluetooth 5.0 connectivity, 6 customizable presets, 31-band parametric EQ per channel, Phase correction, Crossover adjustments, Input/output level controls, Time alignment

**Features:** macOS Compatibility

**In-app purchases:** none


### CA AMP

[App page](https://appshunter.io/ios/app/ca-amp/id1554205982)

This application provides comprehensive control and adjustments for amplifiers, including EQ, crossover settings, and digital time alignment. Manage all audio signal processing functions directly from your smartphone or tablet.

**Highlights:** Interactive audio signal processor, EQ adjustments, Controllable crossover (6/12/24/48 dB), Digital time alignment, Grouping functionality, Preset and custom settings memory

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is DSI free?

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

### Is CA AMP free?

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

### Which has better reviews, DSI or CA AMP?

CA AMP is rated higher. DSI averages 3.0 out of 5 from 2 ratings, while CA AMP averages 4.0 from 6 ratings.

### Do DSI or CA AMP have ads?

Neither DSI nor CA AMP shows ads.

### Which is updated more often, DSI or CA AMP?

DSI ships an update every 2 months, and CA AMP every 2 months. Most recently, DSI was updated on September 9, 2026 and CA AMP on June 3, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*