# Klein Borescope ET21 vs MaxPOD

The clearest difference is update cadence: MaxPOD at every 3 weeks against Klein Borescope ET21's every 2 months. Klein Borescope ET21's advantage is iOS requirement (12.0 vs 16.6). 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.

Klein Borescope ET21 ships an update every 2 months, MaxPOD every 3 weeks. The most recent releases landed on September 26, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Klein Borescope ET21 | MaxPOD |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Size | 19 MB | 32 MB |
| Requires iOS | **12.0** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Klein Tools](https://appshunter.io/developer/440692921) | [Uxdlab Software](https://appshunter.io/developer/1829624010) |

## What reviewers say

### Klein Borescope ET21

[App page](https://appshunter.io/ios/app/klein-borescope-et21/id6740300461)

**Features:** macOS Compatibility

**In-app purchases:** none


### MaxPOD

[App page](https://appshunter.io/ios/app/maxpod/id6749258116)

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

**In-app purchases:** none


## Frequently asked questions

### Is Klein Borescope ET21 free?

Klein Borescope ET21 is free to download, with no in-app purchases.

### Is MaxPOD free?

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

### Do Klein Borescope ET21 or MaxPOD have ads?

Neither Klein Borescope ET21 nor MaxPOD shows ads.

### Which is updated more often, Klein Borescope ET21 or MaxPOD?

Klein Borescope ET21 ships an update every 2 months, and MaxPOD every 3 weeks. Most recently, Klein Borescope ET21 was updated on September 26, 2026 and MaxPOD on September 20, 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.*