What Power Apps can do that a spreadsheet cannot
A Power Apps Canvas app presents a form-based interface — on mobile or desktop — connected to a data source: SharePoint list, Dataverse table, or SQL database. Users see only the fields relevant to their task, in the right order, with validation rules enforced before a record can be saved. Required fields cannot be left empty; date fields show a date picker; dropdown fields are constrained to valid options; numeric fields reject text. None of this is configurable in a shared Excel file without VBA that breaks when someone upgrades Office. Permissions are also enforced at the app and data layer: a sales rep sees only their own records; a manager sees all records; neither can edit fields outside their permitted scope. Concurrent editing — the scenario that causes shared spreadsheets to overwrite each other — is handled by the underlying data platform: SharePoint lists support concurrent edits; Dataverse provides full optimistic locking.
Canvas apps are built in Power Apps Studio, a browser-based development environment where screens are designed visually and logic is written in Power Fx — a formula language similar to Excel functions. No JavaScript, no backend, no deployment pipeline. The app connects to a data source in the connector panel, fields are placed on screens by dragging from the data source schema, validation rules are written as formulas in the field properties. Power Apps is included in Microsoft 365 Business Premium and above; standalone Power Apps licences start at around £16 per user per month.
Building a data entry app in a week — the real timeline
Day 1: Define the data structure — what fields are needed, which are required, what the valid values are for dropdowns. Create the SharePoint list (or Dataverse table) from the defined schema. Day 2: Build the main screen in Power Apps Studio — connect the data source, drag fields onto the form, configure labels and layout. Day 3: Add validation rules (required fields, format checks, range constraints), add a list screen showing existing records with search and filter, and add the save and cancel actions. Day 4: Style it — colours consistent with the company palette, appropriate column widths for mobile, a summary card for record details. Day 5: Test with real users, fix any usability issues, and deploy to the team via the Power Apps app in Teams or as a standalone Teams tab.
The most common scope for a first app is a simple two-screen design: a gallery screen that lists records (with search and filter), and an edit form screen for adding or updating a record. This covers the use case of a shared tracking spreadsheet completely. More complex apps — multi-step forms, calculated fields, integration with external systems — add scope but are still typically deliverable within two weeks.
What changes when data entry has structure
The immediate change is data quality. When fields are validated on entry rather than reviewed after the fact, errors are caught at the source: the record cannot be saved with a missing required field or an out-of-range value. The downstream processes that depend on clean data — reporting, notifications, integration with other systems — become more reliable because their input is reliable. Reports that required manual cleaning before they could be run become automatic. In most organisations, the first Power Apps deployment reveals how much time was being spent working around bad data rather than using data.
The second change is visibility. A SharePoint list or Dataverse table behind a Power Apps form is a live, queryable data source: Power BI can report against it, Power Automate flows can trigger on changes, and multiple users can see the current state without refreshing a shared file. The app becomes the system of record for that process — not a file on a shared drive that may or may not be the current version. Teams that have replaced a critical tracking spreadsheet with a Power Apps form consistently find that the process it supported becomes measurably more reliable.