Build a Dynamic Calculation Apps

Boost your productivity

Turn your complicated spreadsheets into calculation apps everyone can use intuitively. Open as App takes all the logic, formulas, and charts into your app automatically.

How should your calculation app look like?

A calculation app with Open as App has the same logic and functions as your spreadsheet. However, it will be much easier to use: Apps are interactive and can be structured in any way you like. When users input values, results are instantly recalculated.


Calculations on-the-go

Easily calculate, track and get relevant information related to your financial investments – simple loan payment calculator with the amortization details behind the scenes.


Fast & powerful

Easily conduct complex calculations on your mobile or tablet – wherever you are.


Presentable results

Visualize your data in a simple and appealing way. No need to confuse your customers with complex spreadsheets.

Product Pricing Calculator App

Easily set user access, rights, security, and much more. You decide who should be able to see your app. By default, your app is visible only to you until you decide to share it with other people. Easily manage who has access to your app and what they can do with it. Once you share the app, it can be used on any platform.

Offer Calculator App

Some of your customers receive a special discount? With the Offer Calculator App you can calculate prices, taking individual discounts into account. Create an offer and share with your customers immediately.

Material Calculator App

Never waste material again. With the Material Calculator App construction and manufacturing companies are able to calculate the exact amount of material needed. Save time, resources and money!

Calculator App Features


Convert to printable PDF


Use Digital Signatures


Track & report insights


Track & report insights


Update without coding


Use custom dashboards

3 steps to build your calculation app


You’ll bring the data, we’ll bring the app

  • Upload or link your data. An Excel file, Google Sheets or a database is required.
  • Choose to link a file from your Google Sheets, OneDrive, Dropbox, etc. or log into your database via Open as App.
  • After authentication, our platform automatically recognizes and analyzes the structure of your data and reveals all the available logic we found.
  • When you see this result, you are ready to go.
  • No result? Don’t worry you can still build an app. You might need to prepare your data before uploading it. Here is how.

Now, you are behind the wheel

Next, you’ll see our app suggestion in the mock-up. Select the template type that should be applied to your app. If you want a map or a calendar, it´s available. Not sure? Stay with the basic list for the moment and move ahead.


Launch your app

Our App Creator leads you through all the steps to making it truly your own app

  • Change columns’ order and fields’ display instantly.
  • Apply a different design template
  • Make changes to your app or manage your app settings – like adding new tabs, elements, or images or changing colors and spaces.
  • Allow editing your lists and let your users update your reports or database entries automatically

Finally, you can publish and share your app with your team and customers.

Ready to try on your own?

Connect your spreadsheets, tables or data to create your app.

Calcuation App FAQ’s

Yes, you can make calculations online and offline. So you are able to use your calculator app wherever you are.

Yes, you can share your app with team members, customers and anyone else who needs to access, use or view your calculation app. Find out more about user management.

Open as app takes the logic from your existing spreadsheets. Therefore, you should see the error message even before creating you app. To fix the errors in your calculations before creating your app. Please have a look at our collection of most common errors in Excel and Google Sheets.

Yes, browse our example apps and find suitable solutions for specific industries or departments. Use the app as a template and adapt it to your specific requirements.

We offer different plans – according to the number of apps you want to create and the number of people you want to share your app with. We´ll finde the perfect plan for you. Have a look at our Pricing Page.

Yes. Embed the calculator app on your website to share your app with all website visitors or customers. Here we explained to you how to embed an app on your website.