# MODI Mobile Diagnostics vs Steer

The clearest difference is in-app purchases: MODI Mobile Diagnostics at none against Steer's 2. MODI Mobile Diagnostics also leads on update cadence (monthly vs every 6 months) and iOS requirement (15.6 vs 26.1). On price, ads 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. MODI Mobile Diagnostics asks for nothing beyond the download.

MODI Mobile Diagnostics ships an update monthly, Steer every 6 months. The most recent releases landed on September 21, 2026 and September 2, 2026 respectively.

## The numbers

| Metric | MODI Mobile Diagnostics | Steer |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 40.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 6 months |
| Monetization | — | Freemium |
| Size | 66 MB | 25 MB |
| Requires iOS | **15.6** | 26.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [MODI Abrites Ltd.](https://appshunter.io/developer/1779687917) | [Smarters Engineered](https://appshunter.io/developer/1821193944) |

## What reviewers say

### MODI Mobile Diagnostics

[App page](https://appshunter.io/ios/app/modi-mobile-diagnostics/id1459081087)

**Features:** Vision Pro support

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is MODI Mobile Diagnostics free?

MODI Mobile Diagnostics is free to download, with no in-app purchases.

### Is Steer free?

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

### Do MODI Mobile Diagnostics or Steer have ads?

Neither MODI Mobile Diagnostics nor Steer shows ads.

### Which is updated more often, MODI Mobile Diagnostics or Steer?

MODI Mobile Diagnostics ships an update monthly, and Steer every 6 months. Most recently, MODI Mobile Diagnostics was updated on September 21, 2026 and Steer on September 2, 2026.

---

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