# OBD Diagnostics vs Tachwire

The clearest difference is in-app purchases: Tachwire at none against OBD Diagnostics's 1. Tachwire also leads on ads (none vs shown) and update cadence (every 3 days vs monthly). On price and device support there is nothing between them.

Both are free to download. OBD Diagnostics sells 1 one-off in-app purchase. Tachwire asks for nothing beyond the download.

OBD Diagnostics ships an update monthly, Tachwire every 3 days. The most recent releases landed on October 6, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | OBD Diagnostics | Tachwire |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/tachwire/id6813896115/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Every 3 days** |
| Monetization | — | Free |
| Size | 23 MB | 138 MB |
| Requires iOS | 26.2 | **18.4** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [EJSmith](https://appshunter.io/developer/305393602) | [Maksim Pogozhii](https://appshunter.io/developer/1877182235) |

## What reviewers say

### OBD Diagnostics

[App page](https://appshunter.io/ios/app/obd-diagnostics/id6759762253)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


### Tachwire

[App page](https://appshunter.io/ios/app/tachwire/id6813896115)

This app displays real-time car data like oil and gearbox temperatures, boost, and gear on your phone's screen. It provides spoken warnings for critical conditions and offers detailed insights for BMWs and other supported vehicles. It also includes road camera alerts and drive recording features.

**Highlights:** Live OBD data display, Customizable tiles on car screen, Spoken warnings for critical conditions, Detailed BMW diagnostics, Road camera alerts, Drive recording and analysis, Track lap timing

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

**In-app purchases:** none


## Frequently asked questions

### Is OBD Diagnostics free?

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

### Is Tachwire free?

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

### Do OBD Diagnostics or Tachwire have ads?

OBD Diagnostics shows ads; Tachwire does not.

### Which is updated more often, OBD Diagnostics or Tachwire?

OBD Diagnostics ships an update monthly, and Tachwire every 3 days. Most recently, OBD Diagnostics was updated on October 6, 2026 and Tachwire on October 22, 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.*