Turn Your Excel Spreadsheet Into a Mobile App

Hi ,

Most of us use Excel to build powerful solutions. Inventory trackers, CRMs, dashboards, workflow tools. Over time, those workbooks grow. More sheets. More formulas. More complexity.

But what happens when your spreadsheet needs to become something more? When multiple people need access. When data entry needs to happen on a phone. When emailing files back and forth stops working.

In this tutorial, you will learn how to transform a simple Excel inventory spreadsheet, into the fully working mobile app shown below using Glide. No coding required.

This article is based on the full walkthrough shown in the companion video below.

Sponsored disclosure: This tutorial is created in partnership with Glide. If you use the affiliate link provided, I may earn a commission at no additional cost to you.

What We Are Starting With: An Excel Inventory Spreadsheet

The starting point is a typical Excel setup:

In Excel, calculating stock on hand usually requires:

This works. But it also means:

Instead of building and maintaining an Inventory sheet in Excel, we will delete that sheet and let the app calculate stock on the fly and only bring in the Products and Inventory sheets.

Step 1: Import Your Excel File Into Glide

In Glide:

Glide automatically converts each sheet into a data table and instantly generates a working app layout.

You now have:

Step 2: Replace Excel Formulas With Glide Logic

In Excel, your stock on hand formula might look like this:

In Glide, you achieve the same result without writing formulas.

Create a Product Site Key

First, create a key that uniquely identifies each Product and Store combination.

Add a Template column in the Transactions table:
ProductID – Site

This is equivalent to a helper column in Excel.

Create a Relation

Next, add a Relation column:

This creates a dynamic link to all transactions for that product and store.

Create a Rollup

Add a Rollup column:

This instantly calculates Stock On Hand. It performs the same job as SUMIFS, but through structured relationships instead of cell formulas.

Step 3: Improve Usability With Lookups

Product IDs are great for data integrity. They are not great for users.

To make the app more intuitive:

Now the app shows meaningful product names and images instead of raw IDs.

Step 4: Design the App Layout

In Layout view, you can customise how information is presented.

For the Transactions screen:

This creates a clean, scannable transaction log.

Create a Dedicated Inventory Screen

Instead of a formula sheet, create a new screen:

You now have a live inventory summary built from transaction data:

Same data. Different presentation.

Step 5: Build a Mistake Proof Data Entry Form

When you add a new transaction, Glide auto generates a form. You can refine it, adding and removing components:

Transaction ID: Set this to a Special Value using Unique Identifier so users do not have to manually enter IDs.

Date: Use a Date Picker component to ensure consistent formatting.

Product: Change ProductID to a Choice component:

Site: Use another Choice component for Store selection. Chips style works well for clarity.

Quantity: Keep this as a number field. Add a placeholder note:

"Sales are negative. Stock received is positive."

This reduces user error and keeps your logic consistent.

Step 6: Test the Inventory Logic

Check the current stock level for a product at a specific store.

Add a new transaction:

Save.

The Inventory screen updates immediately. The rollup recalculates automatically.

No manual refresh. No formula auditing. No risk of overwriting a cell.

Step 7: Automate With Integrations

Manual entry works. Automation is better.

In Settings, go to Integrations.

You can connect Glide to:

Instead of someone typing each stock movement, transactions can be recorded automatically.

Your inventory updates in the background.

Why This Matters for Excel Users

Excel is incredibly powerful. I use it every day.

But there is a tipping point where:

That is where turning your spreadsheet into an app makes sense.

You are not replacing Excel. You are extending it.

When Your Spreadsheet Outgrows Excel

Here are common scenarios where this approach works well:

If your current process involves emailing spreadsheets around or consolidating updates from multiple users, an app built from your existing Excel structure can solve that.

How to Get Started

Start with one of your own files. Choose something structured with:

Import it into Glide and replicate the logic using Relations and Rollups.

If you would like to try the exact demo shown here, download the file from the link above, and sign up for a free Glide account here. Note: I may earn a commission if you sign up for a paid plan, at no additional cost to you.

Have a great day,

Mynda Treacy

Co-founder My Online Training Hub