# Klein Borescope ET21 vs CrowdCheckr

The clearest difference is rating: CrowdCheckr at 5.0 against Klein Borescope ET21's 2.2. CrowdCheckr also leads on update cadence (every 2 weeks vs every 2 months). Klein Borescope ET21's advantage is ratings volume (9 vs 2) and iOS requirement (12.0 vs 15.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

CrowdCheckr holds the better App Store score, 5.0 against 2.2. Both are backed by a comparable volume of ratings — 9 and 2 respectively.

Klein Borescope ET21 ships an update every 2 months, CrowdCheckr every 2 weeks. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Klein Borescope ET21 | CrowdCheckr |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.2 (9 ratings)](https://appshunter.io/ios/app/klein-borescope-et21/id6740300461/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/crowdcheckr/id6804814568/reviews)** |
| Number of ratings | **9** | 2 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Free | Free |
| Size | 19 MB | 2 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Klein Tools](https://appshunter.io/developer/440692921) | [CrowdCheckr LLC](https://appshunter.io/developer/6804814570) |

## What reviewers say

### Klein Borescope ET21

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

This app allows construction workers to capture pictures and videos of worksite progress and details using a WiFi borescope. It facilitates easy documentation of on-site conditions and project advancements.

**Highlights:** Picture capture, Video recording, WiFi connectivity, Worksite documentation, Progress tracking

**Features:** macOS Compatibility

**In-app purchases:** none


### CrowdCheckr

[App page](https://appshunter.io/ios/app/crowdcheckr/id6804814568)

Streamline venue management with automatic occupancy counting, private event bookings, and real-time insights. Optimize staffing based on historical data and manage your entire team's access with role-based permissions.

**Highlights:** Automatic occupancy counting, Private event booking management, Real-time venue insights, Data-driven staffing recommendations, Role-based team access, Historical data analysis

**Features:** macOS Compatibility

**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 CrowdCheckr free?

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

### Which has better reviews, Klein Borescope ET21 or CrowdCheckr?

CrowdCheckr is rated higher. Klein Borescope ET21 averages 2.2 out of 5 from 9 ratings, while CrowdCheckr averages 5.0 from 2 ratings.

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

Neither Klein Borescope ET21 nor CrowdCheckr shows ads.

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

Klein Borescope ET21 ships an update every 2 months, and CrowdCheckr every 2 weeks. Most recently, Klein Borescope ET21 was updated on October 30, 2026 and CrowdCheckr on October 31, 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.*