# GREENHOW PRO vs Troodon OBD

The clearest difference is iOS requirement: GREENHOW PRO at 8.0 against Troodon OBD's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

GREENHOW PRO ships an update every 5 weeks, Troodon OBD every 3 weeks. The most recent releases landed on October 4, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | GREENHOW PRO | Troodon OBD |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 3 weeks** |
| Size | 71 MB | 27 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [锦才 钟](https://appshunter.io/developer/1433440881) | [DevCom spol. s r.o.](https://appshunter.io/developer/1725153456) |

## What reviewers say

### GREENHOW PRO

[App page](https://appshunter.io/ios/app/greenhow-pro/id1146358345)

**Features:** macOS Compatibility

**In-app purchases:** none


### Troodon OBD

[App page](https://appshunter.io/ios/app/troodon-obd/id6475777811)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is GREENHOW PRO free?

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

### Is Troodon OBD free?

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

### Do GREENHOW PRO or Troodon OBD have ads?

Neither GREENHOW PRO nor Troodon OBD shows ads.

### Which is updated more often, GREENHOW PRO or Troodon OBD?

GREENHOW PRO ships an update every 5 weeks, and Troodon OBD every 3 weeks. Most recently, GREENHOW PRO was updated on October 4, 2026 and Troodon OBD on October 1, 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.*