# Klein Tools Borescope

> Companion app for ET20 devices for visual inspection. (iPhone/iPad app by Klein Tools.)

- Source: https://appshunter.io/ios/app/klein-tools-borescope/id1437485935 (this page in markdown: same URL + `.md`)
- Developer: [Klein Tools](https://appshunter.io/developer/440692921)
- Category: Utilities, Productivity
- Price: Free
- Rating: 1.80/5 from 57 App Store ratings · 41 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 16 MB
- Languages: American English, French (France), Chinese (Simplified, China), European Spanish
- Released: 2018-09-30
- Data updated: 2026-07-26
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/klein-tools-borescope/id1437485935/reviews.md

## What is Klein Tools Borescope?

This is an App for use with ET20 devices

## Key features

- Connects to ET20 devices
- Live camera feed viewing
- Access recorded data
- Visual inspection tool

## Recent user reviews (10 of 41)

All indexed reviews: https://appshunter.io/ios/app/klein-tools-borescope/id1437485935/reviews.md

### 4/5 — Great Live Feed Video

*2026-07-06, version 1.9.1*

This app is rated low for its ability to share and view recorded videos, and that is fair. I can't speak on this as I didn't buy the tool for this purpose. 

For the singular purpose of providing live feed video to identify problems, the tool performs as expected. I was able to go deep into my engine bay and grab a bolt that slipped out of reach/sight. The flashlight feature with variable illumination is useful and rarely does the video lag. If you buy this tool and use the app, expect this tool to function well under these conditions.

### 1/5 — Planned obsolescence

*2026-05-06, version 1.9.1*

I bought my Klein ET16 borescope less than a year ago and it is now useless because Klein no longer supports it although I have used this app with it as long as I have owned it and now Klein is forcing me to buy their new WiFi borescope because they decided to not support the ET16 on iOS any longer.

### 1/5 — Fails to Save

*2026-04-20, version 1.9.1*

This is the worse app ever.  The app fails to save video to the iPhone photo app.  When saving the videos all the photos app plays back is a totally blurred video. When forwarding a video from the app to iMessage the video attachment is only a blurred image with no way to play the video.

### 1/5 — Unsupported app

*2026-03-08, version 1.9.1*

App no longer works. Hasn’t been updated in 3 years. I’m so so disappointed

### 1/5 — Does not work with iPhone

*2026-01-09, version 1.9.1*

In my case I have the ET16, the working application is only available on google play store. This does not work.

### 1/5 — Great Company, horrible execution on this one.

*2025-10-27, version 1.9.1*

Don’t waste your time with this borescope. The scope might be decent, however I am unable to stay connected long enough to see if it’s a quality device or not. This app is absolute garbage. I will be returning it as soon as the retailer opens today. I would also advise anyone considering purchasing this tool to strongly reconsider. If I could rate it 0 out of 5, I would.

### 4/5 — Works so far (day 1)

*2025-08-07, version 1.9.1*

I needed a long borescope ASAP to solve a customers problem. The first thing I saved to my phone was a picture, and after that any video I downloaded would have a picture as the first frame and show a black screen the rest of the duration. Deleted the app, redownloaded, saved a video before any photos, and now the videos play like normal. Downloaded a picture then another video and all came out normal. My biggest complaint is not towards klein but that the only supply house in town that had a borescope in stock charged me double the msrp. Cost of doing business I guess.

### 5/5 — Lildave2012

*2025-04-12, version 1.9.1*

Don’t listen to this guy. He’s just mad because his mama cheated on his daddy with his uncle(pops bro) and now he’s got a half brother/ cousin on the way,  that he knows he’s going to have to take care of.

### 1/5 — Returned the tool for refund

*2025-02-14, version 1.9.1*

The concept is great. Use your phone/tablet as a display. 

The software is utter garbage. It is so bad I recommend buying the tool and looking at the software as a lesson on how much software developers can hate you. 

Klein developers are lazy. There was no effort to test the software in the real world. There was no effort to QA this software because the devs saw QA on the release schedule, didn’t know what it meant, so they skipped it. 

This software is so bad Apple should revoke Klein’s publishing cert and delete the app from everyone’s devices as an apology for doing this to us. 

Oh, and Home Depot, you’re just as much to blame here. Do your purchasers not TEST the products you sell to your customers?

### 2/5 — Could be much better

*2025-01-31*

Tool itself seems ok. Software is what earns two stars. Send the intern that wrote this app to some training. Changing the orientation of the phone puts the controls off screen.

## Frequently asked questions about Klein Tools Borescope

### What does the Klein Tools Borescope app do?

This app serves as a companion for ET20 devices. It enables users to view live camera feeds from the connected device and access any recorded data. It's designed for visual inspection tasks.

### What devices is this app compatible with?

The app is specifically designed for use with ET20 devices. It requires a connection to this hardware to function and provide its visual inspection capabilities.

### Is this app free to download and use?

Yes, the application is free to download and use. There are no in-app purchases or advertisements associated with its functionality.

### What are the main features of the app?

The primary features include connecting to ET20 devices, viewing live camera feeds from the connected hardware, and accessing recorded data. It acts as a visualizer for inspection purposes.

## Version history (last 5 releases)

### 1.9.1 — 2022-08-24

Fixed some known bugs

### 1.9 — 2022-03-04

v1.9.1 update content
Fixed an app crash when using iPad for file sharing

### 1.8 — 2021-07-06

Put OpenGL into the main thread to run，Speed up video decoding

### 1.7 — 2021-05-20

ios14 updated the cell strategy, which caused the table content to not be clicked normally. This version fixes this problem.

### 1.6 — 2021-04-21

Fix, under the IOS14 system, the program is started for the first time and authorized to access the network, which causes the network communication abnormality.

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## More apps by Klein Tools

- [Thermal TI222 / TI223](https://appshunter.io/ios/app/thermal-ti222-ti223/id1590422539)
- [Thermal TI270/TI290](https://appshunter.io/ios/app/thermal-ti270ti290/id1595947863)
- [ET30 Klein Inspection Camera](https://appshunter.io/ios/app/et30-klein-inspection-camera/id6474340805)
- [Wifi Borescope ET19](https://appshunter.io/ios/app/wifi-borescope-et19/id6475085217)
- [Klein Borescope ET21](https://appshunter.io/ios/app/klein-borescope-et21/id6740300461)

All apps by Klein Tools: https://appshunter.io/developer/440692921

## Related topics

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-26.*