Calculate anything
Prices, doses, loan payments, yields and tolerances. If a spreadsheet can work it out, so can your app.
The app builder for spreadsheet people
Turn your spreadsheet into an app
If you can write a formula in Excel, you can build calculators, quote tools and field guides that your team and customers can use on any phone or in any browser. No programming needed.
Try it now. No sign-up required.
Trusted by teams such as
- 400+
- formula functions
- 79
- languages
- 2003
- building calculator apps since
See it work
You already know how to do this
Your spreadsheet has inputs, formulas and results. So does an app. Calcapp keeps the logic you know and replaces the grid with a clean form. Change a value in the app and watch the spreadsheet follow.
quote-calculator.xlsx
| A | B | C | D | E | |
|---|---|---|---|---|---|
| 1 | Quantity | 40 | Region | Shipping | |
| 2 | Unit price | 12.50 | Europe | 15 | |
| 3 | Region | Europe | Americas | 25 | |
| 4 | Discount | 10% | Asia | 35 | |
| 5 | Shipping | 15.00 | |||
| 6 | Total | 465.00 |
In your spreadsheet
=B1*B2*(1-B4)+B5
In Calcapp
Quantity * UnitPrice *
(1 - Discount) + Shipping
Calcapp formulas use names instead of cell references, so they are easier to read and harder to break.
Drag the slider, then select Discount, Shipping or Total to compare the formulas.
Formulas
A formula engine on par with Excel
Calcapp gives you more than 400 functions, from SUM and IF to XLOOKUP, FILTER, LET, MAP and REDUCE. In a spreadsheet, a mistake can hide in a number that looks right. Calcapp checks every formula as you write it and tells you what is wrong, so mistakes surface in the designer and not in front of a customer.
Total is 5940 and Threshold is the text
"5000", as pasted from another system.
A spreadsheet answers
Total > Threshold
FALSE
5940 is larger, but a spreadsheet orders all text after all
numbers. The answer is wrong, and nothing flags it.
Calcapp answers
Total > Threshold
Type mismatch
This is a text string, but the other side of ">" is a
number
Look things up
Paste a price list or rate table from your spreadsheet, then query it with XLOOKUP and FILTER.
Decide how your app behaves
Use formulas to show and hide fields, flag invalid input, pick email recipients and decide what buttons do.
What you can build
Tools that spreadsheets were never good at sharing
Spreadsheets have protected cells, but the logic of an app is read-only by design. Nobody can mess up your formulas. These are the tools our customers build.
Website calculators
ROI, savings and pricing calculators that turn visitors into leads.
Quotes and financial tools
Consistent quotes, loan and retirement models your clients can explore.
Field tools
Estimators and checklists for job sites, in pockets and working offline.
Clinical calculators
Dose and dilution tools. This is where Calcapp began, back in 2003.
Product selectors
Help sales teams and customers pick the right size, model or configuration.
Manuals and guides
Formatted text and images, mixed with calculations, on every device.
Everything around the math
A real app, not a spreadsheet in disguise
Install it on any phone
Calcapp apps are Progressive Web Apps. Users add yours to their home screen in seconds, with no app store review and no downloads to manage. They can also run it in any browser.
Works offline
Basements, barns and airplanes are fine. Calculations run on the device.
Embeds in your website
Paste a snippet and your calculator is part of your page.
Documentation included
Mix formatted text, images and links with your calculations.
Private when needed
Require users to sign in, so confidential logic stays with your team.
Catches mistakes
Validation flags unlikely input before it becomes a costly result.
Looks like your brand
Choose your colors, then add your own logo and launcher icon.
Connects to the tools you use
Generate PDF and CSV reports at the press of a button. Through Zapier and similar services, send collected data to spreadsheets, databases, Slack and thousands of other services.
See how it works
Some features depend on your plan. Compare plans.
How it works
From spreadsheet to published app in three steps
-
Design your app
Add fields and screens in the visual designer, or start from a template.
-
Add your formulas
Write them the way you do in Excel. The live preview updates as you go.
-
Publish and share
Press a button. Send a link, embed it on your site or have users install it.
Calcapp is simple enough for anyone to use and they provide amazing support—no other product compares. We quickly managed to bring our ROI marketing campaign to life with Calcapp. Using an outside developer would have cost $6,000.
We used traditional spreadsheets for many years to help our customers plan and operate water treatment systems using our products. Today, Calcapp has helped us move these calculations into an accessible mobile tool.
An honest answer
Is Calcapp right for you?
We would rather tell you now than after you have built something.
A great fit if you want to
- Turn inputs into answers, across thousands of fields.
- Put calculators, checklists and manuals on phones.
- Look up values in tables that you maintain yourself.
- Add a calculator to your website.
- Collect input and send it onward as a report or webhook.
Not the right tool if you need to
- Show data that changes on its own, read live from a database or spreadsheet.
- Let users edit shared records, as in a customer database or inventory system.
- Write directly to a spreadsheet without a service such as Zapier in between.
- Control every detail of the appearance of your app.
Tables inside your app are static: you update them in the designer. Read about tabular data.
Stuck or short on time?
Get help from the people who built Calcapp
On a paid plan, we are with you every step of the way, helping you turn your vision into a working app. If you would rather have us take the reins, for example with a full conversion of your spreadsheet, we charge for that work by the hour.
Start with the spreadsheet you already have
Try Calcapp without an account. Sign up for free when you want to save your work.