# FA 4xx App vs IV Hybrid

The clearest difference is in-app purchases: FA 4xx App at none against IV Hybrid's 4. FA 4xx App also leads on iOS requirement (9.0 vs 13.0). IV Hybrid's advantage is update cadence (fortnightly vs every 34 months). On price, ads and device support there is nothing between them.

Both are free to download. IV Hybrid sells 4 one-off in-app purchases. FA 4xx App asks for nothing beyond the download.

FA 4xx App ships an update every 34 months, IV Hybrid fortnightly. The most recent releases landed on October 14, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | FA 4xx App | IV Hybrid |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 34 months | **Fortnightly** |
| Size | 93 MB | 67 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Woehler Technik GmbH](https://appshunter.io/developer/959456679) | [inspectionviewer.com Inc.](https://appshunter.io/developer/1594829999) |

## What reviewers say

### FA 4xx App

[App page](https://appshunter.io/ios/app/fa-4xx-app/id1466210879)

**Features:** macOS Compatibility

**In-app purchases:** none


### IV Hybrid

[App page](https://appshunter.io/ios/app/iv-hybrid/id6449873607)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Economy Pack Report Charges | $1.99 | one-time |
| Pay as you use report charges | $14.99 | one-time |
| IV Hybrid Economy Pack | $24.99 | one-time |
| Unlimited reports per Month | $99.99 | one-time |


## Frequently asked questions

### Is FA 4xx App free?

FA 4xx App is free to download, with no in-app purchases.

### Is IV Hybrid free?

IV Hybrid is free to download, with in-app purchases available.

### Do FA 4xx App or IV Hybrid have ads?

Neither FA 4xx App nor IV Hybrid shows ads.

### Which is updated more often, FA 4xx App or IV Hybrid?

FA 4xx App ships an update every 34 months, and IV Hybrid fortnightly. Most recently, FA 4xx App was updated on October 14, 2026 and IV Hybrid on October 7, 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.*