What Templates, UI Components and Assets Does Proto.io Provide?

Proto.io ships with three built-in resource libraries so you can start a prototype without designing from scratch: 250+ UI components that mimic native iOS, Android and web behavior, 1000+ customizable templates for web and mobile, and 6000+ digital assets covering static and animated icons, stock images and sound effects. All three are reachable through the drag-and-drop editor, and the site states no coding skills are required. The 15-day free trial is the practical way to confirm the libraries cover your specific screens before committing.

The three resource libraries at a glance

UI components: behavior, not just looks

The component libraries are organized by platform (iOS, Android, Web), and the site emphasizes that components "not only look like but also mimic the behavior of their original native counterparts." In practice, that means a toggle, picker or navigation bar behaves the way users of that platform expect, so your prototype reads as realistic during reviews rather than as a static mockup.

Templates: pre-built starting points

Templates are described as "ready-made and fully-customizable" for both Web and Mobile, built from commonly needed blocks and elements. The site names several example categories: Sign In, Onboarding, Settings, and E-Commerce, alongside a Material UI Kit, a side navigation kit, an audio web template with a device header, and an onboarding tour. If your project resembles one of these flows, starting from a template and editing it is faster than building from components alone.

Digital assets: icons, images and sound

The asset library combines static and animated icons, stock images and sound effects, so you don't need to source or import visuals to make a prototype feel complete. Animated icons and sound effects are particularly useful for demonstrating micro-interactions and feedback states without extra work.

How these resources connect to interactivity

The libraries are the building blocks; Proto.io's interaction and animation features are what make them behave. The site lists over 80 events and over 40 actions, plus nested and multidirectional scrollable areas, which you attach to components and templates. For motion, there are 18 out-of-the-box screen transitions (slide, push, pop and others) and timeline-based transitions that let you animate any layer with control over timing, easing and duration. You can also change properties on the fly — opacity, colors, fonts, rotation, size, scale, filters and shadows.

A concrete example: pick the Onboarding template, swap in your own copy and images from the stock library, then wire the "Next" button to a slide transition and add a timeline animation that fades in each onboarding illustration. The result is a clickable, animated flow built entirely from provided resources.

Deciding whether the libraries fit your project

The resource set suits you if:

• You want speed over pixel-level control. Templates and native-behaving components get you to a reviewable prototype quickly.
• You're prototyping standard mobile or web patterns. Sign-in, onboarding, settings and e-commerce flows are explicitly covered.
• You need motion without coding. Transitions and timeline animations are built in.
• You work across platforms. Separate iOS, Android and Web component sets let one prototype match each platform's conventions.

Look elsewhere or plan extra work if your design depends on a highly custom component system not represented in the libraries, or if you need to verify exact template contents before starting — in that case, use the free trial to browse the libraries first.

Getting started

1. Open the editor and choose a template matching your flow (for example, Sign In or Onboarding) or start with a blank canvas.
2. Drag UI components from the iOS, Android or Web library onto your screens.
3. Add icons, stock images or sound effects from the asset library.
4. Connect screens with one of the 18 transitions and layer animations with timeline transitions.
5. Preview on the web or a mobile browser, or use the native iOS/Android apps for easier or offline viewing, then share the prototype.

The main friction point to watch for is over-customizing a template before confirming the flow works — wire the interactions first, then refine visuals. Proto.io offers a 15-day free trial, which is enough time to test whether the templates and components match your product's screens.