It takes less than 3 seconds to launch the application
OR
It takes longer than 3 seconds to launch, but the app displays feedback and/or cached content, so the user understands that the app is starting.

The Back Gesture is used to navigate to previous scenes in the scene hierarchy. The scene does not include buttons to navigate to previous scenes in the hierarchy.

Users tap items in a scene to interact with them. Tapping opens a new scene or performs an action.

When navigating to a different scene , a zoom transition is used. When updating or replacing content in the same scene , a cross-fade

The application has been tested on all webOS devices (either on the device or in the emulator) and its UI works effectively on all screen sizes/resolutions (320 x 480 and 320 x 400).

The application includes standard webOS controls (like lists, buttons, etc) that Palm provides.
And/Or
It includes custom controls. If the app uses custom controls that are analagous to standard webOS controls, they should support the same interactions/feedback that their webOS analog does. If the custom control is a new control that webOS does not have, it should work/look/feel like the other UI controls on the platform.

The application does not use controls or design elements from other mobileOS platforms.

Users can flick and drag to scroll content. The app does not include buttons or other controls to scroll content.

A tapped item displays visual "tap feedback" so it's clear that the item has been tapped.

Tap feedback is the "right" size. It is neither larger or smaller than the object being tapped (button, row height, etc).

Scenes support gestures like pinch/spread to zoom in/out of content like images and maps. Users tap items in a scene to interact with them. Tapping opens a new scene or performs an action.

When editing content that resides on the device (or in an account the device is connected to) like Contacts, Calendar Events, Tasks and more, the Back gesture automatically saves changes made in the scene.

When creating content that will be sent or posted elsewhere (like an email message), the UI includes a button to send/post the item. The Back gesture saves (but does not send) the item.

When the user edits content in a scene and throws the card away, the changes are saved.

If the scene includes a button to leave the scene, it is called "Done" (not Save).

When changing application Preferences, changes are either applied immediately or are applied when the Back gesture is performed.

There are no more than 5 commandMenu buttons at the bottom of a scene that contains them.

Tapable UI elements are at least 48 pixels tall and/or wide. If the visual component of a tapable item is smaller, the div its enclosed in is large enough to ensure tapability.

Body text should never be smaller than 15 px.

Labels should never be smaller than 14 px. Note: Font sizes between 18-20 px work best on webOS devices. Use a large font (like 22) for tappable list items.

The default keyboard is set properly when the user enters a field. Examples: The Number keyboard for phone number & zip code fields. The Text keyboard is set for name, city, and state fields.

When the application requires a decision from the user before it can proceed, it displays a dialog box.

When the app is running in the background and does something the user should know about, but does not require them to interact with it immediately, it displays a banner notification.

When the app is running in the background and does something the user must know about and interact with (calendar reminder, phone call), a popup notification is displayed.

When the app performs an action that takes more than 2 seconds, an activity indicator is displayed.

When a scene takes more than 2 seconds to load, the app displays UI elements or cached content, and displays a small activity indicator.

When a user taps a pushbutton that intiates an action that takes more than 2 seconds to complete (like Signing In), the app displays a small activity indicator on the button and changes the text label to indicate what the app is doing.

All App Menus contain Palm's Edit menu item drawer (first position) and Help menu item (last position).

If the application manages Preferences and/or Accounts, a menu item appears immediately above Help.

If the application manages Preferences only, the menu item is named Preferences.

If the application manages Accounts only, the menu item is named Accounts.

If the application manages Preferences and Accounts, the menu item is named Preferences & Accounts.

The scene's special menu items appear between Edit and the last Palm-resevered item (Help or Preferences & Accounts).

Tapping the Help menu item opens a Help scene. Preferably, the standard webOS Help scene.

The Help scene displays at least one method of support (developer website, phone number, email) that works. It can also contain links to application-related help, frequently asked questions, etc.

If the application uses Location (GPS) information, it uses Location Services and respects the user's OS-level Location Services preferences.

The application respects the Volume and Ringer Switch settings. For instance, if the volume is turned down, the app does not play its audio at a different volume level. If the Ringer Switch is off, the app respects the "Ringer Switch Off" settings in the Sounds & Ringtones control panel.

The application displays notifications at reasonable intervals.

The application does not cause other apps "slow down" or work poorly while it's running in the background.

Processor-intensive applications (like games) pause when they are minimized to a card.

The application’s size is 5 mb or less
OR
The the developer provided acceptable reasons for their file size when they uploaded the app. Even so, recommend that they:

• Find ways to use "more efficient" images (like a short one, that can be repeated to create a pattern) instead of full-size images.
• Optimize files that are included in the app (images, movie)
• Consider leaving certain things out of the app and download or stream them when needed.