# Flatter vs OpenOBD

The clearest difference is ads: OpenOBD at none against Flatter's shown. OpenOBD also leads on update cadence (every 2 days vs fortnightly). Flatter's advantage is iOS requirement (12.0 vs 16.4). On price, 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.

Flatter ships an update fortnightly, OpenOBD every 2 days. The most recent releases landed on September 29, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Flatter | OpenOBD |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (1 ratings)](https://appshunter.io/ios/app/openobd-live-car-data/id6780283561/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | **Every 2 days** |
| Monetization | — | Free |
| Size | 24 MB | 36 MB |
| Requires iOS | **12.0** | 16.4 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jeong-soo Park](https://appshunter.io/developer/1248341387) | [Osman Cengeri](https://appshunter.io/developer/1807592099) |

## What reviewers say

### Flatter

[App page](https://appshunter.io/ios/app/flatter-level/id1248341388)

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

**In-app purchases:** none


### OpenOBD

[App page](https://appshunter.io/ios/app/openobd-live-car-data/id6780283561)

Transform your iPhone into a real-time car dashboard. Connect an OBD2 adapter to monitor live engine data, track your trips with GPS, and diagnose fault codes with clear explanations. Explore all features in demo mode without hardware.

**Highlights:** Live engine data monitoring, Real-time speed, RPM, temperature gauges, Trip logging with GPS mapping, Read and clear diagnostic trouble codes (DTCs), Vehicle information display, Demo mode for exploration

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

**In-app purchases:** none


## Frequently asked questions

### Is Flatter free?

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

### Is OpenOBD free?

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

### Do Flatter or OpenOBD have ads?

Flatter shows ads; OpenOBD does not.

### Which is updated more often, Flatter or OpenOBD?

Flatter ships an update fortnightly, and OpenOBD every 2 days. Most recently, Flatter was updated on September 29, 2026 and OpenOBD on September 28, 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.*