# Comp 2.0 vs Arbornotes

The clearest difference is update cadence: Arbornotes at every 3 months against Comp 2.0's every 11 months. Comp 2.0's advantage is iOS requirement (15.0 vs 18.2). 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.

Comp 2.0 ships an update every 11 months, Arbornotes every 3 months. Both last shipped on September 23, 2026.

## The numbers

| Metric | Comp 2.0 | Arbornotes |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (6 ratings)](https://appshunter.io/ios/app/comp-20/id6450721506/reviews)** | — |
| Number of ratings | **6** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 139 MB | 2 MB |
| Requires iOS | **15.0** | 18.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Holley Performance Products](https://appshunter.io/developer/1175069390) | [Laurent Poirier](https://appshunter.io/developer/1817294058) |

## What reviewers say

### 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


### Arbornotes

[App page](https://appshunter.io/ios/app/arbornotes/id6746522017)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Comp 2.0 free?

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

### Is Arbornotes free?

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

### Do Comp 2.0 or Arbornotes have ads?

Neither Comp 2.0 nor Arbornotes shows ads.

### Which is updated more often, Comp 2.0 or Arbornotes?

Comp 2.0 ships an update every 11 months, and Arbornotes every 3 months. Most recently, Comp 2.0 was updated on September 23, 2026 and Arbornotes on September 23, 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.*