# viZion by Quadzilla vs Comp 2.0

The clearest difference is rating: Comp 2.0 at 3.8 against viZion by Quadzilla's 1.0. viZion by Quadzilla's advantage is update cadence (every 4 months vs every 11 months) and iOS requirement (5.1.1 vs 15.0). 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.

Comp 2.0 holds the better App Store score, 3.8 against 1.0. Both are backed by a comparable volume of ratings — 3 and 6 respectively.

viZion by Quadzilla ships an update every 4 months, Comp 2.0 every 11 months. The most recent releases landed on October 11, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | viZion by Quadzilla | Comp 2.0 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (3 ratings)](https://appshunter.io/ios/app/vizion-by-quadzilla/id503955281/reviews) | **[3.8 (6 ratings)](https://appshunter.io/ios/app/comp-20/id6450721506/reviews)** |
| Number of ratings | 3 | **6** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 11 months |
| Monetization | Free | Free |
| Size | 8 MB | 139 MB |
| Requires iOS | **5.1.1** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Quadzilla Power, LLC](https://appshunter.io/developer/1018307322) | [Holley Performance Products](https://appshunter.io/developer/1175069390) |

## What reviewers say

### viZion by Quadzilla

[App page](https://appshunter.io/ios/app/vizion-by-quadzilla/id503955281)

This utility app connects with specific hardware modules to display real-time data. It allows users to monitor various parameters directly from their mobile device.

**Highlights:** Connects with Quadzilla viZion Gauge modules, Displays real-time data, Monitors various parameters, Mobile device interface

**Features:** macOS Compatibility

**In-app purchases:** none


### Comp 2.0

[App page](https://appshunter.io/ios/app/comp-20/id6450721506)

Enhance your 1998.5-2002 24V Cummins diesel engine's performance with on-the-fly adjustments. Fine-tune fueling, accelerator pedal response, and timing for significant power gains.

**Highlights:** On-the-fly adjustability via Bluetooth, Fine-tune low boost fueling, Adjust fuel delivery based on pedal position, Optimize timing for power curves, Gains of 40-150 HP and 150-380 TQ, Supports aftermarket injectors and turbos

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is viZion by Quadzilla free?

viZion by Quadzilla is free to download, with no in-app purchases.

### Is Comp 2.0 free?

Comp 2.0 is free to download, with no in-app purchases.

### Which has better reviews, viZion by Quadzilla or Comp 2.0?

Comp 2.0 is rated higher. viZion by Quadzilla averages 1.0 out of 5 from 3 ratings, while Comp 2.0 averages 3.8 from 6 ratings.

### Do viZion by Quadzilla or Comp 2.0 have ads?

Neither viZion by Quadzilla nor Comp 2.0 shows ads.

### Which is updated more often, viZion by Quadzilla or Comp 2.0?

viZion by Quadzilla ships an update every 4 months, and Comp 2.0 every 11 months. Most recently, viZion by Quadzilla was updated on October 11, 2026 and Comp 2.0 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.*