Canvas Apps vs Model-Driven Apps
Power Apps offers two fundamentally different app types. Canvas apps start from a blank canvas — like PowerPoint — where you drag controls anywhere in pixel-perfect freeform layouts and wire every behavior with Power Fx; you choose the data source after deciding the design. Model-driven apps flip that order: you first define the Dataverse data model — tables, relationships, business rules — and the app's forms, views, and navigation are generated automatically from that model, trading layout freedom for consistency, responsiveness, and built-in enterprise features like business process flows.
Cricket analogy: Canvas apps are like a groundsman designing a boutique stadium from an empty field, choosing every stand and sightline, while model-driven apps are like the standardized ICC-regulation pitch dimensions that automatically dictate the layout once you specify it's a Test match venue.
When to Choose Canvas Apps
Canvas apps are the right choice for task-focused, single-purpose apps — a shift-handover form, an expense-photo capture tool, a warehouse scanning app — where pixel-level control over layout, a highly tailored mobile experience, or a non-Dataverse data source (SharePoint, SQL Server, Excel) is important. Because every screen and control is placed manually, canvas apps also support far more creative UI patterns, custom themes, and offline-capable mobile scenarios using the Save Data / Load Data functions or the built-in offline profile, at the cost of more manual wiring work as the app grows.
Cricket analogy: A canvas app built for scoring a single tournament format like The Hundred is like a bespoke scoring app tailored to that competition's unique rules, rather than a generic system trying to cover Test, ODI, and T20 all at once.
When to Choose Model-Driven Apps
Model-driven apps fit enterprise scenarios spanning many related entities — a case-management system, a CRM, an asset-tracking system with dozens of interrelated tables — where consistency, responsive layout across devices, security roles, and built-in components like business process flows, dashboards, and views matter more than bespoke visuals. Because the UI is generated from the Dataverse schema, adding a new field to a table automatically surfaces it on forms and views without manually re-wiring the screen, which dramatically reduces maintenance overhead for large, evolving data models compared to a canvas app.
Cricket analogy: A model-driven app tracking players, teams, matches, and statistics across an entire league is like the BCCI's centralized database, where adding a new stat field automatically appears across every relevant report without redesigning each one by hand.
// Example: a Canvas App formula (manual, explicit control)
If(
IsBlank(TextInputEmail.Text),
Notify("Email is required", NotificationType.Error),
Patch(Contacts, Defaults(Contacts), { Email: TextInputEmail.Text })
)
// Model-driven apps instead rely on Dataverse Business Rules,
// configured declaratively (no Power Fx) in the table designer:
// IF Email field is empty
// THEN show error "Email is required" on the Email field
// This rule applies automatically to every form built on the table.A common beginner mistake is picking a canvas app for a scenario that will grow into a multi-table enterprise system. As tables and business logic multiply, canvas apps require rewiring every screen's formulas manually, while a model-driven app on the same schema would surface new fields automatically — evaluate expected long-term complexity before choosing the app type.
- Canvas apps start from a blank layout with manual control over every pixel and formula.
- Model-driven apps generate forms, views, and navigation automatically from the Dataverse data model.
- Canvas apps work with many data sources; model-driven apps are built specifically on Dataverse.
- Canvas apps suit single-purpose, task-focused, or highly customized mobile scenarios.
- Model-driven apps suit enterprise systems with many interrelated tables and evolving schemas.
- Model-driven apps reduce maintenance because new fields automatically surface on existing forms and views.
- Choosing the wrong app type early can create significant rework as an app's complexity grows.
Practice what you learned
1. What is the main structural difference between canvas apps and model-driven apps?
2. Which app type is generally the better fit for a single-purpose mobile data-capture tool with a highly customized layout?
3. In a model-driven app, what happens when you add a new field to a Dataverse table?
4. What mechanism do model-driven apps use to declaratively enforce logic like required fields, without writing Power Fx?
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An introduction to Microsoft Power Apps, the low-code platform for building canvas and model-driven business applications, and how it fits into the wider Power Platform.
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A tour of the Power Apps Studio editor — its Tree view, design canvas, formula bar, App Checker, and data/media panels — and how they fit together during app building.
Your First Canvas App
A walkthrough of building a first canvas app using 'Start with data', covering the Browse/Detail/Edit screen pattern, galleries, and saving records with Patch and SubmitForm.
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