# Obi® vs ArctechPro 3.x

The clearest difference is update cadence: Obi® at monthly against ArctechPro 3.x's every 4 months. ArctechPro 3.x's advantage is iOS requirement (11.0 vs 15.6). 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.

Obi® ships an update monthly, ArctechPro 3.x every 4 months. The most recent releases landed on October 27, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Obi® | ArctechPro 3.x |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 4 months |
| Size | 13 MB | 9 MB |
| Requires iOS | 15.6 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [i3PT Certification Association Ltd](https://appshunter.io/developer/1232536577) | [Geoff Needham](https://appshunter.io/developer/904635372) |

## What reviewers say

### Obi®

[App page](https://appshunter.io/ios/app/obi/id1510966220)

**Features:** macOS Compatibility

**In-app purchases:** none


### ArctechPro 3.x

[App page](https://appshunter.io/ios/app/arctechpro-3x/id1581593984)

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

**In-app purchases:** none


## Frequently asked questions

### Is Obi® free?

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

### Is ArctechPro 3.x free?

ArctechPro 3.x is free to download, with no in-app purchases.

### Do Obi® or ArctechPro 3.x have ads?

Neither Obi® nor ArctechPro 3.x shows ads.

### Which is updated more often, Obi® or ArctechPro 3.x?

Obi® ships an update monthly, and ArctechPro 3.x every 4 months. Most recently, Obi® was updated on October 27, 2026 and ArctechPro 3.x on October 13, 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.*