# Steer vs MasterBuilder Pro

The clearest difference is update cadence: MasterBuilder Pro at every 2 months against Steer's every 6 months. MasterBuilder Pro also leads on iOS requirement (15.1 vs 26.1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Steer sells 2 in-app purchases, starting at $9.99 per month and MasterBuilder Pro sells 3 in-app purchases, starting at $9.00 per month. Whichever you choose, the download price is not the number that matters.

Steer ships an update every 6 months, MasterBuilder Pro every 2 months. The most recent releases landed on September 2, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | Steer | MasterBuilder Pro |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 40.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 months** |
| Monetization | Freemium | — |
| Size | 25 MB | 34 MB |
| Requires iOS | 26.1 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Smarters Engineered](https://appshunter.io/developer/1821193944) | [Harrison Habib](https://appshunter.io/developer/1883474674) |

## What reviewers say

### Steer

[App page](https://appshunter.io/ios/app/steer-obd2-car-scanner/id6461049378)

Transform your smartphone into a powerful OBD2 diagnostic tool. Read and clear fault codes, monitor real-time performance metrics, and test your vehicle's acceleration and emissions. Compatible with a wide range of car brands and OBD2 scanners.

**Highlights:** Universal OBD2 scanner compatibility, Read and erase fault codes, Real-time performance metrics, Acceleration and performance testing, Emission compliance checks, Supports various car brands

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OBD2 Pro | $9.99 | per month |
| OBD2 Pro | $19.99 | per year |


### MasterBuilder Pro

[App page](https://appshunter.io/ios/app/masterbuilder-pro/id6760252415)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MasterBuilder Pro Monthly | $9.00 | per month |
| Annual | $89.99 | per year |
| Lifetime | $199.99 | one-time |


## Frequently asked questions

### Is Steer free?

Steer is free to download, with in-app purchases available.

### Is MasterBuilder Pro free?

MasterBuilder Pro is free to download, with in-app purchases available.

### Do Steer or MasterBuilder Pro have ads?

Neither Steer nor MasterBuilder Pro shows ads.

### Which is updated more often, Steer or MasterBuilder Pro?

Steer ships an update every 6 months, and MasterBuilder Pro every 2 months. Most recently, Steer was updated on September 2, 2026 and MasterBuilder Pro on September 12, 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.*