# Comp 2.0 vs My Build Vault

The clearest difference is rating: My Build Vault at 5.0 against Comp 2.0's 3.8. My Build Vault also leads on update cadence (every 2 months vs every 11 months). Comp 2.0's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. My Build Vault sells 1 in-app purchase, starting at $19.99 per year. Comp 2.0 asks for nothing beyond the download.

My Build Vault holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: Comp 2.0 has 6 ratings behind it against 1, so its average is the more settled of the two.

Comp 2.0 ships an update every 11 months, My Build Vault every 2 months. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Comp 2.0 | My Build Vault |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (6 ratings)](https://appshunter.io/ios/app/comp-20/id6450721506/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/my-build-vault/id6757723076/reviews)** |
| Number of ratings | **6** | 1 |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 11 months | **Every 2 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 139 MB | 28 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Holley Performance Products](https://appshunter.io/developer/1175069390) | [Tim Eberhard](https://appshunter.io/developer/1868067933) |

## 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


### My Build Vault

[App page](https://appshunter.io/ios/app/my-build-vault/id6757723076)

This app helps car enthusiasts meticulously track vehicle modifications, performance data, and important documents. It allows users to log parts, costs, and installation details, monitor performance metrics, and store vehicle-related paperwork. Features include AI invoice scanning and VIN decoding for comprehensive build management.

**Highlights:** Track modifications across 7 categories, Log performance metrics like dyno runs and acceleration, Store and manage vehicle documents with expiry alerts, Generate professional build sheets for various purposes, AI-powered invoice scanning for automatic data extraction, VIN decoder for factory specifications, Fleet management for multiple vehicles

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| My Build Vault Pro | $19.99 | per year |


## Frequently asked questions

### Is Comp 2.0 free?

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

### Is My Build Vault free?

My Build Vault is free to download, with in-app purchases available.

### Which has better reviews, Comp 2.0 or My Build Vault?

My Build Vault is rated higher. Comp 2.0 averages 3.8 out of 5 from 6 ratings, while My Build Vault averages 5.0 from 1 ratings.

### Do Comp 2.0 or My Build Vault have ads?

My Build Vault shows ads; Comp 2.0 does not.

### Which is updated more often, Comp 2.0 or My Build Vault?

Comp 2.0 ships an update every 11 months, and My Build Vault every 2 months. Most recently, Comp 2.0 was updated on November 3, 2026 and My Build Vault on October 31, 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.*