# NETA App vs Klein Borescope ET21

The clearest difference is update cadence: NETA App at every 5 days against Klein Borescope ET21's every 2 months. 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.

NETA App ships an update every 5 days, Klein Borescope ET21 every 2 months. The most recent releases landed on September 17, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | NETA App | Klein Borescope ET21 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 2 months |
| Size | 14 MB | 19 MB |
| Requires iOS | 12.4 | **12.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [International Electrical Testing Association Inc.](https://appshunter.io/developer/1316658619) | [Klein Tools](https://appshunter.io/developer/440692921) |

## What reviewers say

### NETA App

[App page](https://appshunter.io/ios/app/neta-app/id6473797762)

**Features:** macOS Compatibility

**In-app purchases:** none


### Klein Borescope ET21

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is NETA App free?

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

### Is Klein Borescope ET21 free?

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

### Do NETA App or Klein Borescope ET21 have ads?

Neither NETA App nor Klein Borescope ET21 shows ads.

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

NETA App ships an update every 5 days, and Klein Borescope ET21 every 2 months. Most recently, NETA App was updated on September 17, 2026 and Klein Borescope ET21 on September 27, 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.*