Comparison

Zendesk Sell vs Klein Borescope ET21

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Zendesk Sell

This sales productivity platform offers a cutting-edge mobile experience for sales teams. It provides essential CRM features alongside mobile-specific tools like communication tracking, email templates with notifications, and geolocation for efficient sales management on the go.

Highlights
  • Communication tracking
  • Email templates with view notifications
  • Geolocation for nearby customers
  • Automatic call logging
  • Mobile reporting
  • Offline access
  • Real-time lead notifications
Read full description

Zendesk Sell is a sales productivity platform that blends usability and intelligence to give you a cutting edge mobile sales experience. Sell not only provides everything that you and your sales team would ever need from a sales app, but also goes above and beyond by adding mobile sales productivity features like communication tracking, email templates with view notifications, geolocation and mobile reporting. With the top rated Sell mobile apps for iPad and iPhone, your sales team will have access to everything they need to be efficient and effective, right in the palm of their hand. Sell provides a fast and secure communication tool that gives you complete pipeline visibility of your team. With a highly usable interface, offline access, and the ability to sync to all of your devices including the web application, Sell is the perfect tool for effectively managing your sales team. The Sell iPhone and iPad apps not only includes amazing mobile features; they include features that translate to providing a great mobile sales experience. In addition to providing a core sales app that includes all of your customer relations management needs, Sell also provides: --MOBILE SALES PRODUCTIVITY-- • Geolocation to view all of your nearby customers on a native map • Email templates for quick, personalized communication • Email view notifications so you know when a message has been opened • Automatic call logging and call outcome tracking • Smart list integration to view your existing smart lists directly on your phone, taking the latest Sell technology with you everywhere • Communication tracking complete with sync functionality --INTELLIGENCE-- • Receive a real-time notification when critical leads, contacts and deals are updated rather than waiting to find out at the weekly sales meeting. • Reporting functionality with a beautifully clear user interface, so that you can see your sales funnel from any angle, and customize the information displayed so that it caters to your needs. Sell is the leading mobile sales app for high performance sales teams on the road. --THE BENEFITS ARE CLEAR-- Why Reps love Sell: -Email templates and view notifications -Auto call logging -Visualize leads, contacts and deals on a map with geolocation Why Managers love Sell: -Complete pipeline visibility for field reps -On the go reporting -Real-time notifications Sell doesn't just get the job done. It provides an experience that makes you productive anytime, anywhere. Download the Zendesk Sell app now for a powerful and intelligent mobile sales experience.

About

Klein Borescope ET21

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
Read full description

The WiFi Borescope provides construction workers picture and video capture of worksite progress and details

Screenshots

Zendesk Sell4 screens
Klein Borescope ET214 screens

Verdict

The call

The clearest difference is rating: Zendesk Sell at 4.6 against Klein Borescope ET21's 2.2. Zendesk Sell also leads on ratings volume (1.6K vs 9). Klein Borescope ET21's advantage is in-app purchases (none vs 1). On price, update cadence, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Zendesk Sell sells 1 one-off in-app purchase. Klein Borescope ET21 asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Zendesk Sell holds the better App Store score, 4.6 against 2.2. That said, the two scores are not equally well evidenced: Zendesk Sell has 1.6K ratings behind it against 9, so its average is the more settled of the two.

UpkeepUpdate frequency

Zendesk Sell ships an update every 3 months, Klein Borescope ET21 every 2 months. The most recent releases landed on October 21, 2026 and October 28, 2026 respectively.

Scorecard4 real differences · 6 level
Zendesk Sell versus Klein Borescope ET21: the parameters behind the verdict, then further details
ParameterZendesk SellKlein Borescope ET21
PriceFreeFree
Rating4.6 (1.6K ratings) — better2.2 (9 ratings)
Positive reviews80.4% of reviews—
Number of ratings1.6K — better9
Update frequencyEvery 3 monthsEvery 2 months — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS13.012.0 — better
Further details — not scored
Size91 MB19 MB
Age rating4+4+
DeveloperFuture SimpleKlein Tools

Bugs and requests

Zendesk Sell

Reported bugs

5 issues
  • Leads not syncing properly
  • Deals disappearing from the app
  • White screen on app launch
  • Signature issues in email integration
  • Inconsistent call and text logs

Requested features

5 requests
  • Customizable sales pipelines
  • Advanced reporting and analytics
  • Improved mobile app performance
  • Better email and calendar integration
  • Ability to edit user-defined fields

Klein Borescope ET21

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Zendesk Sell

One-time1
  • Voice Credit$4.99
None

Klein Borescope ET21

No in-app purchases

Questions

Is Zendesk Sell free?
Zendesk Sell is free to download, with in-app purchases available.
Is Klein Borescope ET21 free?
Klein Borescope ET21 is free to download, with no in-app purchases.
Which has better reviews, Zendesk Sell or Klein Borescope ET21?
Zendesk Sell is rated higher. Zendesk Sell averages 4.6 out of 5 from 1.6K ratings, while Klein Borescope ET21 averages 2.2 from 9 ratings.
Do Zendesk Sell or Klein Borescope ET21 have ads?
Neither Zendesk Sell nor Klein Borescope ET21 shows ads.
Which is updated more often, Zendesk Sell or Klein Borescope ET21?
Zendesk Sell ships an update every 3 months, and Klein Borescope ET21 every 2 months. Most recently, Zendesk Sell was updated on October 21, 2026 and Klein Borescope ET21 on October 28, 2026.

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