# SmartOBD vs Trinity Guard

The clearest difference is update cadence: Trinity Guard at every 5 weeks against SmartOBD's every 4 months. SmartOBD's advantage is iOS requirement (9.0 vs 15.1). 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.

SmartOBD ships an update every 4 months, Trinity Guard every 5 weeks. The most recent releases landed on October 4, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | SmartOBD | Trinity Guard |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 5 weeks** |
| Size | 22 MB | 52 MB |
| Requires iOS | **9.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ginception Software Ltd](https://appshunter.io/developer/632518159) | [Petadev Solutions Korlatolt Felelossegu Tarsasag](https://appshunter.io/developer/1660737022) |

## What reviewers say

### SmartOBD

[App page](https://appshunter.io/ios/app/smartobd-ii/id1089377396)

**Features:** macOS Compatibility

**In-app purchases:** none


### Trinity Guard

[App page](https://appshunter.io/ios/app/trinity-guard/id1660737020)

**In-app purchases:** none


## Frequently asked questions

### Is SmartOBD free?

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

### Is Trinity Guard free?

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

### Do SmartOBD or Trinity Guard have ads?

Neither SmartOBD nor Trinity Guard shows ads.

### Which is updated more often, SmartOBD or Trinity Guard?

SmartOBD ships an update every 4 months, and Trinity Guard every 5 weeks. Most recently, SmartOBD was updated on October 4, 2026 and Trinity Guard on October 5, 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.*