A/B Pre-test Calculator by Speero

Speero's A/B Pre-test Calculator helps you answer vital pre-test questions like MDE, sample size, duration, and more.

A/B Pre-test Calculator by Speero is available to install from Chrome Web Store and for download from this page. It has 1,000+ active users The latest version is 1.4, and it was published a year ago.

Install from Chrome Web Store

View source code

Total download count: 2 (Only count downloads from Chrome-Stats)

All available versions

You can find the current and older versions of A/B Pre-test Calculator by Speero here. You can download the archived versions or inspect their source codes.

As a free user, you can only download the latest version.

Upgrade to download older versions

5 versions available for download.

Install CRX file

Option 1: The easy way (for Windows users only)

Download and run chrome-stats.exe file on your PC. This method will allow you to install Chrome extensions directly from chrome-stats.com in one click. You only need to do this once!
Type in chrome://restart in the URL bar to restart the browser for the changes to take effect.
Download and install the A/B Pre-test Calculator by Speero CRX file

Option 2: Advanced method

Download A/B Pre-test Calculator by Speero CRX file
NOTE: Sometimes the browser may block downloading / installing CRX file from outside the Chrome Web Store. If so, you may need to use option 1, or download the ZIP file instead.
In the URL bar, go to chrome://extensions
Enable Developer mode
Drag and drop the downloaded A/B Pre-test Calculator by Speero CRX file into the Extensions page
When prompted, click Add extension to install A/B Pre-test Calculator by Speero.

Install ZIP file

Download and unpack the A/B Pre-test Calculator by Speero ZIP file to a directory of your choice.
In Chrome browser, go to chrome://extensions
Enable Developer mode.
Click on the Load Unpacked button.
Select the directory of with the unpacked A/B Pre-test Calculator by Speero ZIP file from step 1. A/B Pre-test Calculator by Speero is now installed on your browser.