# I vs Troodon OBD

The clearest difference is update cadence: Troodon OBD at every 3 weeks against I's every 4 months. I's advantage is iOS requirement (8.0 vs 15.0). On price, ads, 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.

I ships an update every 4 months, Troodon OBD every 3 weeks. The most recent releases landed on October 6, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | I | Troodon OBD |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Size | 11 MB | 27 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Spetrotec LTD](https://appshunter.io/developer/660726738) | [DevCom spol. s r.o.](https://appshunter.io/developer/1725153456) |

## What reviewers say

### I

[App page](https://appshunter.io/ios/app/i-watcher/id660726735)

**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 I free?

I 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 I or Troodon OBD have ads?

Neither I nor Troodon OBD shows ads.

### Which is updated more often, I or Troodon OBD?

I ships an update every 4 months, and Troodon OBD every 3 weeks. Most recently, I was updated on October 6, 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.*