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Dinkytown V3 General FAQ

Answers to common questions about V3 calculator licensing, browser support, customization, and integration.

The V3 calculators use JavaScript, HTML5 and CSS to display and run the calculators. There is never an additional plug-in, spyware or other software to install.

Please contact support with any questions when deploying or using the calculators. Reach us by email at or by phone at (612) 331-2291.

More information can be found at:

Frequently Asked Questions:

Do your calculators use responsive design?

Yes — they are designed from the ground up to responsively adapt to the device they are being used on. Small screens automatically reformat to maximize limited screen space and prevent unnecessary scrolling. Graphs and text resize appropriately and sliding scales adapt to best fit or hide depending on the viewing device. The V3 calculators allow you to install one set of calculators that work anywhere you have a browser.

Do you support the use of Content Security Policy (CSP)?

Yes — this support has been in place since 2017. We fully support Content Security Policy (CSP) on sites where it has been enabled, but it is not required. The primary goal of CSP is to not allow a browser to execute scripts from uncontrolled locations, including inline JavaScript. To eliminate XSS attacks, CSP blocks all inline scripting and doesn't attempt to determine its origin or safety.

For more information please see Mozilla CSP.

Do your calculators follow ADA requirements for WCAG 2.1?

Yes — all calculators meet or exceed accessibility specification WCAG 2.1 Level AA and Section 508.

For more information please see Financial Calculators WCAG 2.1 Level AA.

We will continue to monitor and update our software to maintain compliance and ensure any future compliance issues are resolved quickly. If you have a specific calculator on your site where you have a question, please feel free to contact us.

What are the terms of your license agreement?

When you purchase our commercial versions, you will need to accept our license agreement. This agreement defines the terms of use for any software you purchase from us. The basic terms allow you to use the software on a single website for as long as you wish, without additional license fees. Please follow the link below to view the complete license agreement.

View our complete license agreement

Where can I view your license agreement?

View our complete license agreement

Have your calculators been reviewed by FINRA (formally the NASD)?

The majority of our financial calculators have been reviewed by the Financial Industry Regulatory Authority (FINRA) through one or more of our clients. Whenever there has been an issue, we have acted immediately to address it.

The FINRA has two primary concerns regarding financial calculators used by their members. First, all “Rate of Return” definitions need to include the relevant risk and assumptions. All of our calculators that include “Rate of Return” have a definition that has been reviewed and approved by the FINRA.

Second, no rate of return on any calculator should exceed 12%. Our default cap is 20%. For FINRA member clients, we offer an option that reduces this limit to 12%, bringing the calculators into full compliance with FINRA rules.

If your compliance department, the FINRA, or the SEC finds an issue with one of our calculators, we will always do our utmost to resolve it immediately. FINRA or SEC issues are resolved at no additional charge. Most compliance department concerns are covered at no charge as well, though there may be a small custom development fee for enhancements specific to your company.

Will these calculators work in WordPress?

Yes, you can embed these calculators into a WordPress page. Follow the instructions for embedding a calculator into an existing page. In addition you will need the ability to load JavaScript and CSS files to your server. Some free versions of WordPress may limit your ability to load these file types. Virtually all paid WordPress hosted sites allow for these files to be loaded. Contact your website host if you are uncertain.

Do I have to provide a link to you on our calculator pages?

No. As a matter of fact, we are one of the few companies that allow you to brand our calculators as your own. We require no visible reference to KJE Computer Solutions, Inc. or link to our website once the calculator is loaded. We do require a copyright notice in the comments of the source code for each page you publish, and a brief copyright notice when the calculator loads.

Can I purchase these calculators on behalf of a client?

Yes, however all updates will be forwarded to the purchaser of the software. If you are not going to be providing long-term support for a client's website, you may wish to have your client purchase the calculators directly from us. Your client can then send you access information to download the software so that you can handle the installation.

We have an outside resource deploying our website — how do you support their deployment?

We are happy to support just about any third-party resource in the deployment of your calculators. All we request is that you provide us with their contact information. You can include this in the comments section of your order, via email, or by phone call. Your outside resource can then contact us directly with any questions or issues that may arise.

Which browser versions do you support?

We offer the widest possible device support — including Chrome, Safari, Firefox, Opera, iPod, iPad, iPhone, Windows 7, Windows 8, Windows 10, macOS, Linux, Android Phones, Android Tablets, Kindle Fire and just about anywhere else you have a browser. For best results please use a modern version of Chrome, Safari, Firefox, or a modern mobile device. All of these browsers provide excellent JavaScript support, including quick load times and fast calculations.

Operating systems supported include Windows 7, Windows 8, Windows 10, Mac OS X, iOS and Android. The combination of our operating system and browser support covers over 99% of all internet use.

Which web servers do you support?

Because all of our calculators run on your visitor's browser with JavaScript, we do not require any special web-server processing or installation. That makes us compatible with virtually every web server in use today, including support for HTTP and HTTPS. Examples include Apache, Microsoft, Netscape-Enterprise, Zeus, Rapidsite, thttpd, Tiger Shark and almost any other HTTP server on virtually any platform. Our calculators have been successfully set up on all versions of Windows, Mac OS X, Linux and Unix.

What can I customize on the calculators?

Using a little bit of JavaScript and CSS you can customize virtually all colors, fonts and many of the graphical aspects of the calculators. In addition, you can format content around the calculator or embed the calculators directly into existing pages. Our calculators have been designed to be highly adaptable to your website with the potential for seamless integration and branding. Additional information and many code examples can be found in our V3 Customize FAQ.

Do the calculators work with iFrames?

Yes! The iframe will load the calculator and automatically size/resize responsively. Simply add this code where you wish the calculator to appear:

<script type="text/javascript" SRC="KJE.js"></script>
<iframe id="KJE-IFRAME" src="index.html" style="width:100%;border:none;" scrolling="no"></iframe>

Make sure index.html above points to the deployment location of your calculators. You can also load a specific calculator by changing index.html to the calculator's HTML file name (e.g. MortgageLoan.html).

What technology do you use to create your calculators?

All of our V3 calculators use HTML5, JavaScript and CSS. In addition they use responsive design to automatically adapt to the device and screen size.

Can I embed a calculator on my site (without any download)?

Yes — we can host all of the JS and CSS files on our server and you only need to paste a small piece of HTML code into the page where you want a calculator to appear. To give this a try please go through our free trial sign-up. It will provide you with the option to download the trial package or paste the required HTML code into your existing web page.

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