Quickstart: Your First NExS App

This tutorial walks you through creating a simple tip calculator and publishing it as a web app.

Prerequisites

Microsoft Excel
A NExS account at platform.nexs.com

Step 1: Create Your Spreadsheet

Open Excel and create a simple tip calculator:

	A	B
1	Tip Calculator
2
3	Bill Amount	$50.00
4	Tip Percentage	20%
5
6	Tip Amount	=B3*B4
7	Total	=B3+B6

Format the cells:

B3: Currency format
B4: Percentage format
B6, B7: Currency format

Step 2: Add the NExS.app Worksheet

Create a new worksheet and name it NExS.app (spelling and punctuation matter).

Add this configuration:

	A	B	C
1	app	Tip Calculator
2	view	Sheet1!A1:B7
3		editable	B3, B4

This tells NExS:

Line 1: Name the app “Tip Calculator”
Line 2: Show cells A1:B7 from Sheet1 as the view
Line 3: Allow users to edit cells B3 (bill amount) and B4 (tip percentage)

Step 3: Save and Upload

Save your file as .xlsx format (File → Save As → Excel Workbook)
Log in to platform.nexs.com
Click “Create New App”
Upload your .xlsx file
NExS processes your spreadsheet and creates your app

Step 4: Test Your App

After upload, NExS shows you a preview. Try it:

Change the bill amount from $50 to $75
Watch the tip and total recalculate automatically
Try different tip percentages

Your formulas are running on NExS servers—users never see them.

Step 5: Get Your Embed Code

From the app management console:

Click “Embed” or “Get Code”
Copy the script embed (recommended):

<script class="nexs"
  src="https://static.nexs.com/js/nexs_embed.js"
  data-nexs-app-url="https://platform.nexs.com/app/YOUR-APP-ID">
</script>

Paste this into any HTML page, WordPress post, or website builder

Step 6: Embed on Your Website

Add the embed code to your web page:

<!DOCTYPE html>
<html>
<head>
  <title>My Tip Calculator</title>
</head>
<body>
  <h1>Restaurant Tip Calculator</h1>
  <p>Calculate the perfect tip for your meal:</p>

  <script class="nexs"
    src="https://static.nexs.com/js/nexs_embed.js"
    data-nexs-app-url="https://platform.nexs.com/app/YOUR-APP-ID">
  </script>
</body>
</html>

That’s it! Your spreadsheet is now a live web application.

What’s Next?

Now that you’ve built your first app, explore more features:

Embedding Basics — Customize your embed with the Declarative API
Views and Layouts — Create multi-view apps
Charts — Add visual data displays
Buttons — Add interactivity with clickable actions

Troubleshooting

App won’t upload?

Ensure your file is .xlsx format (not .xls or .xlsm)
Check that the worksheet is named exactly NExS.app

Formulas showing as text?

Make sure formulas start with =
Verify the source cells are within your view range

Cells not editable?

Confirm the cell addresses in your editable list are correct
Cell addresses are relative to the worksheet, not the view