diff --git a/tns-core-modules/application/application.d.ts b/tns-core-modules/application/application.d.ts
index 9458811f5..2c5157be5 100644
--- a/tns-core-modules/application/application.d.ts
+++ b/tns-core-modules/application/application.d.ts
@@ -32,7 +32,7 @@ export var suspendEvent: string;
 export var resumeEvent: string;
 
 /**
- * String value used when hooking to exitevent.
+ * String value used when hooking to exit event.
  */
 export var exitEvent: string;
 
@@ -212,7 +212,7 @@ export function on(event: "suspend", callback: (args: ApplicationEventData) => v
 export function on(event: "resume", callback: (args: ApplicationEventData) => void, thisArg?: any);
 
 /**
- * This event is raised when the Application is about to exitEvent.
+ * This event is raised when the Application is about to exit.
  */
 export function on(event: "exit", callback: (args: ApplicationEventData) => void, thisArg?: any);
 
@@ -285,7 +285,7 @@ export interface AndroidActivityRequestPermissionsEventData extends AndroidActiv
     requestCode: number;
 
     /**
-     * The Permissions
+     * The Permissions.
      */
     permissions: Array<string>;
 
@@ -425,7 +425,7 @@ export class AndroidApplication extends Observable {
     on(event: "activityBackPressed", callback: (args: AndroidActivityBackPressedEventData) => void, thisArg?: any);
 
     /**
-     * This event is raised on the back button is pressed in an android application.
+     * This event is raised when the Android activity requests permissions.
      */
     on(event: "activityRequestPermissions", callback: (args: AndroidActivityRequestPermissionsEventData) => void, thisArg?: any);
 
diff --git a/tns-core-modules/connectivity/connectivity.d.ts b/tns-core-modules/connectivity/connectivity.d.ts
index e25eb72aa..d82728606 100644
--- a/tns-core-modules/connectivity/connectivity.d.ts
+++ b/tns-core-modules/connectivity/connectivity.d.ts
@@ -25,14 +25,14 @@ export enum connectionType {
     wifi = 1,
 
     /**
-     * Denotes a mobile connection, i.e. cellular network or WAN
+     * Denotes a mobile connection, i.e. cellular network or WAN.
      */
     mobile = 2
 }
 
 /**
  * Starts monitoring the connection type.
- * @param connectionChangedCallback A function that will be called when the connection type changes.
+ * @param connectionTypeChangedCallback A function that will be called when the connection type changes.
  */
 export function startMonitoring(connectionTypeChangedCallback: (newConnectionType: number) => void): void;
 
diff --git a/tns-core-modules/file-system/file-system-access.d.ts b/tns-core-modules/file-system/file-system-access.d.ts
index 4ad4f01d3..c9048d50a 100644
--- a/tns-core-modules/file-system/file-system-access.d.ts
+++ b/tns-core-modules/file-system/file-system-access.d.ts
@@ -38,14 +38,16 @@ export class FileSystemAccess {
 
     /**
      * Gets all entities of a given path (folder)
-     * @param onSuccess A callback function to call if operation is successful
+     * @param path Path to the file.
      * @param onError (optional) A callback function to use if any error occurs.
+     * Returns an array of entities in the folder.
      */
     getEntities(path: string, onError?: (error: any) => any): Array<{ path: string; name: string; extension: string }>;
 
     /**
      * Performs an action onSuccess for every entity in a folder with a given path.
      * Breaks the loop if onSuccess function returns false
+     * @param path Path to the file.
      * @param onEntity A callback function which is called for each entity.
      * @param onError (optional) A callback function to use if any error occurs.
      */
@@ -76,7 +78,7 @@ export class FileSystemAccess {
     deleteFolder(path: string, onError?: (error: any) => any);
 
     /**
-     * Deletes a content of a folder with a given path.
+     * Deletes all content of a folder with a given path.
      * @param path Path of the folder.
      * @param onError (optional) A callback function to use if any error occurs.
      */
@@ -97,7 +99,7 @@ export class FileSystemAccess {
     getDocumentsFolderPath(): string;
 
     /**
-     * Gets the special documents folder.
+     * Gets the special temp folder.
      * Returns for Android: "/data/data/applicationPackageName/cache", iOS: "/var/mobile/Applications/appID/Library/Caches"
      */
     getTempFolderPath(): string;
@@ -116,17 +118,17 @@ export class FileSystemAccess {
     /**
      * Reads a text from a file with a given path.
      * @param path The path to the source file.
-     * @param onSuccess A callback function which is called when a text is red.
      * @param onError (optional) A callback function to use if any error occurs.
      * @param encoding (optional) If set reads the text with the specified encoding (default UTF-8).
+     * Returns the text read.
      */
     readText(path: string, onError?: (error: any) => any, encoding?: any): string;
 
     /**
      * Reads a binary content from a file with a given path.
      * @param path The path to the source file.
-     * @param onSuccess A callback function which is called when a text is red.
      * @param onError (optional) A callback function to use if any error occurs.
+     * Returns the binary content read.
      */
     read(path: string, onError?: (error: any) => any): any;
 
@@ -134,7 +136,6 @@ export class FileSystemAccess {
      * Writes a text to a file with a given path.
      * @param path The path to the source file.
      * @param content The content which will be written to the file.
-     * @param onSuccess (optional) A callback function which is called when a text is written.
      * @param onError (optional) A callback function to use if any error occurs.
      * @param encoding (optional) If set writes the text with the specified encoding (default UTF-8).
      */
@@ -144,7 +145,6 @@ export class FileSystemAccess {
      * Writes a binary to a file with a given path.
      * @param path The path to the source file.
      * @param content The content which will be written to the file.
-     * @param onSuccess (optional) A callback function which is called when a text is written.
      * @param onError (optional) A callback function to use if any error occurs.
      */
     write(path: string, content: any, onError?: (error: any) => any);
@@ -168,14 +168,17 @@ export class FileSystemAccess {
     normalizePath(path: string): string;
 
     /**
-     * Join two paths (without normalize) only removes some trailing and dublicating path separators.
+     * Joins two paths (without normalize). Only removes some trailing and duplicate path separators.
      * @param left First path to join.
      * @param right Second path to join.
+     * Returns the joined path.
      */
     joinPath(left: string, right: string): string;
 
     /**
      * Joins an array of file paths.
+     * @param paths An array of paths.
+     * Returns the joined path.
      */
     joinPaths(paths: string[]): string;
 }
diff --git a/tns-core-modules/image-source/image-source.d.ts b/tns-core-modules/image-source/image-source.d.ts
index b38cbf892..d191e2c8c 100644
--- a/tns-core-modules/image-source/image-source.d.ts
+++ b/tns-core-modules/image-source/image-source.d.ts
@@ -19,7 +19,7 @@ export class ImageSource {
     width: number;
 
    /**
-    * Gets or sets the rotation angle that should be applied to image. (Used in android)
+    * Gets or sets the rotation angle that should be applied to the image. (Used in android)
     */
     rotationAngle: number;
 
@@ -76,13 +76,13 @@ export class ImageSource {
     fromData(data: any): Promise<boolean>;        
 
     /**
-     * Loads this instance from the specified native image data.
+     * Loads this instance from the specified base64 encoded string.
      * @param source The Base64 string to load the image from.
      */
     loadFromBase64(source: string): boolean;
     
     /**
-     * Loads this instance from the specified native image data asynchronously.
+     * Loads this instance from the specified base64 encoded string asynchronously.
      * @param source The Base64 string to load the image from.
      */
     fromBase64(source: string): Promise<boolean>;        
@@ -110,6 +110,10 @@ export class ImageSource {
     toBase64String(format: "png" | "jpeg" | "jpg", quality?: number): string;
 }
 
+/**
+ * Creates a new ImageSource instance and loads it from the specified image asset asynchronously.
+ * @param asset The image asset.
+ */
 export function fromAsset(asset: imageAssetModule.ImageAsset): Promise<ImageSource>;
 
 /**
@@ -125,14 +129,14 @@ export function fromResource(name: string): ImageSource;
 export function fromFile(path: string): ImageSource;
 
 /**
-* Creates a new ImageSource instance and loads it from the specified resource name.
+* Creates a new ImageSource instance and loads it from the specified native image data.
 * @param data The native data (byte array) to load the image from. This will be either Stream for Android or NSData for iOS.
 */
 export function fromData(data: any): ImageSource;
 
 /**
- * Creates a new ImageSource instance and loads it from the specified resource name.
- * @param source The Base64 string to load the image from.
+ * Creates a new ImageSource instance and loads it from the specified base64 encoded string.
+ * @param source The base64 encoded string to load the image from.
  */
 export function fromBase64(source: string): ImageSource;
 
@@ -150,7 +154,7 @@ export function fromNativeSource(source: any): ImageSource;
 export function fromUrl(url: string): Promise<ImageSource>;
 
 /**
- * Creates a new ImageSource instance and loads it from the specified local file or resource(if spexified with "res://" prefix)
+ * Creates a new ImageSource instance and loads it from the specified local file or resource (if specified with the "res://" prefix).
  * @param path The location of the file on the file system.
  */
 export function fromFileOrResource(path: string): ImageSource;
diff --git a/tns-core-modules/platform/platform.d.ts b/tns-core-modules/platform/platform.d.ts
index a7a9a08bb..94aaf9967 100644
--- a/tns-core-modules/platform/platform.d.ts
+++ b/tns-core-modules/platform/platform.d.ts
@@ -40,7 +40,7 @@ export interface Device {
     model: string;
 
     /**
-     * Gets the model of the device.
+     * Gets the OS of the device.
      * For example: "Android" or "iOS".
      */
     os: string;
@@ -52,32 +52,32 @@ export interface Device {
     osVersion: string;
 
     /**
-     * Gets the OS version.
+     * Gets the SDK version.
      * For example: 19(android), 8.1(ios).
      */
     sdkVersion: string;
 
     /**
-     * Gets the type current device.
-     * Available values: "phone", "tablet".
+     * Gets the type of the current device.
+     * Available values: "Phone", "Tablet".
      */
     deviceType: "Phone" | "Tablet";
 
     /**
      * Gets the uuid.
-     * On iOS this will return a new uuid if the application re-installed on the device.
+     * On iOS this will return a new uuid if the application is re-installed on the device.
      * If you need to receive the same uuid even after the application has been re-installed on the device,
      * use this plugin: https://www.npmjs.com/package/nativescript-ios-uuid
      */
     uuid: string;
 
     /**
-     * Gets the preferred language. For example "en"
+     * Gets the preferred language. For example "en" or "en-US".
      */
     language: string;
 
     /**
-     * Gets the preferred region. For example "US"
+     * Gets the preferred region. For example "US".
      */
     region: string;
 }
@@ -123,6 +123,6 @@ export module screen {
 }
 
 /**
- * Gets the current device information
+ * Gets the current device information.
  */
 export var device: Device;    
diff --git a/tns-core-modules/ui/gestures/gestures.d.ts b/tns-core-modules/ui/gestures/gestures.d.ts
index 53394c393..bbe54fd51 100644
--- a/tns-core-modules/ui/gestures/gestures.d.ts
+++ b/tns-core-modules/ui/gestures/gestures.d.ts
@@ -44,7 +44,7 @@ export enum GestureTypes {
 }
 
 /**
- * Defines an enum with supported gesture types.
+ * Defines an enum with supported gesture states.
  */
 export enum GestureStateTypes {
     /**
@@ -196,7 +196,7 @@ export interface Pointer {
 }
 
 /**
- * Provides gesture event data for pinch gesture.
+ * Provides gesture event data.
  */
 export interface GestureEventDataWithState extends GestureEventData {
     state: number;
diff --git a/tns-core-modules/ui/html-view/html-view.d.ts b/tns-core-modules/ui/html-view/html-view.d.ts
index d7f9047bd..df58c594b 100644
--- a/tns-core-modules/ui/html-view/html-view.d.ts
+++ b/tns-core-modules/ui/html-view/html-view.d.ts
@@ -19,7 +19,7 @@ export class HtmlView extends View {
     /**
      * Gets the native [UILabel](https://developer.apple.com/library/ios/documentation/UIKit/Reference/UILabel_Class/) that represents the user interface for this component. Valid only when running on iOS.
      */
-    ios: any /* UILabel */;
+    ios: any /* UITextView */;
 
     /**
      * Gets or sets html string for the HtmlView.
diff --git a/tns-core-modules/ui/image/image.d.ts b/tns-core-modules/ui/image/image.d.ts
index 08aef26e0..4228e445a 100644
--- a/tns-core-modules/ui/image/image.d.ts
+++ b/tns-core-modules/ui/image/image.d.ts
@@ -31,7 +31,7 @@ export class Image extends View {
     src: any;
 
     /**
-     * Gets a value indicating if the image is currently loading
+     * Gets a value indicating if the image is currently loading.
      */
     readonly isLoading: boolean;
 
diff --git a/tns-core-modules/ui/layouts/dock-layout/dock-layout.d.ts b/tns-core-modules/ui/layouts/dock-layout/dock-layout.d.ts
index b44ceb39c..ca97a9728 100644
--- a/tns-core-modules/ui/layouts/dock-layout/dock-layout.d.ts
+++ b/tns-core-modules/ui/layouts/dock-layout/dock-layout.d.ts
@@ -9,12 +9,12 @@ import { LayoutBase, View, Property } from "../layout-base";
  */
 export class DockLayout extends LayoutBase {
     /**
-     * Gets the value of the Left property from a given View.
+     * Gets the value of the Dock property from a given View.
      */
     static getDock(view: View): Dock;
 
     /**
-     * Sets the value of the Left property from a given View.
+     * Sets the value of the Dock property from a given View.
      */
     static setDock(view: View, value: Dock): void;
 
diff --git a/tns-core-modules/ui/layouts/grid-layout/grid-layout.d.ts b/tns-core-modules/ui/layouts/grid-layout/grid-layout.d.ts
index 4ee7bc383..48edc4b27 100644
--- a/tns-core-modules/ui/layouts/grid-layout/grid-layout.d.ts
+++ b/tns-core-modules/ui/layouts/grid-layout/grid-layout.d.ts
@@ -35,7 +35,7 @@ export class ItemSpec {
     isAuto: boolean;
 
     /** 
-     * Returns true if this ItemSpec instance holds weighted propertion  
+     * Returns true if this ItemSpec instance holds weighted proportion
      * of available space. 
      */
     isStar: boolean;
@@ -107,7 +107,7 @@ export class GridLayout extends LayoutBase {
     public removeColumn(itemSpec: ItemSpec): void;
 
     /**
-     * Removes all columns specification from a GridLayout.
+     * Removes all column specifications from a GridLayout.
      */
     public removeColumns(): void;
 
@@ -117,7 +117,7 @@ export class GridLayout extends LayoutBase {
     public removeRow(itemSpec: ItemSpec): void;
 
     /**
-     * Removes all rows specification from a GridLayout.
+     * Removes all row specifications from a GridLayout.
      */
     public removeRows(): void;
 
diff --git a/tns-core-modules/ui/list-view/list-view.d.ts b/tns-core-modules/ui/list-view/list-view.d.ts
index d542b7f95..c4db6d357 100644
--- a/tns-core-modules/ui/list-view/list-view.d.ts
+++ b/tns-core-modules/ui/list-view/list-view.d.ts
@@ -61,8 +61,8 @@ export class ListView extends View {
     /**
      * A function that returns the appropriate ket template based on the data item.
      */
-
     itemTemplateSelector: string | ((item: any, index: number, items: any) => string);
+
     /**
      * Gets or set the items separator line color of the ListView. 
      */
diff --git a/tns-core-modules/ui/page/page-common.ts b/tns-core-modules/ui/page/page-common.ts
index d88efbf8f..f603d174a 100644
--- a/tns-core-modules/ui/page/page-common.ts
+++ b/tns-core-modules/ui/page/page-common.ts
@@ -324,7 +324,7 @@ backgroundSpanUnderStatusBarProperty.register(PageBase);
 
 /**
  * Dependency property used to control if swipe back navigation in iOS is enabled.
- * This property is iOS sepecific. Default value: true
+ * This property is iOS specific. Default value: true
  */
 export const enableSwipeBackNavigationProperty = new Property<PageBase, boolean>({ name: "enableSwipeBackNavigation", defaultValue: true, valueConverter: booleanConverter });
 enableSwipeBackNavigationProperty.register(PageBase);
diff --git a/tns-core-modules/ui/page/page.d.ts b/tns-core-modules/ui/page/page.d.ts
index e9380168f..4378376e4 100644
--- a/tns-core-modules/ui/page/page.d.ts
+++ b/tns-core-modules/ui/page/page.d.ts
@@ -104,7 +104,7 @@ export class Page extends ContentView {
     public actionBarHidden: boolean;
 
     /**
-     * Used to control if swipe back navigation in iOS is enabled. This property is iOS sepecific. Default value: true
+     * Used to control if swipe back navigation in iOS is enabled. This property is iOS specific. Default value: true
      */
     public enableSwipeBackNavigation: boolean;
 
@@ -278,7 +278,7 @@ export const actionBarHiddenProperty: Property<Page, boolean>;
 
 /**
  * Dependency property used to control if swipe back navigation in iOS is enabled.
- * This property is iOS sepecific. Default value: true
+ * This property is iOS specific. Default value: true
  */
 export const enableSwipeBackNavigationProperty: Property<Page, boolean>;
 
diff --git a/tns-core-modules/ui/search-bar/search-bar.d.ts b/tns-core-modules/ui/search-bar/search-bar.d.ts
index 849ffbbb3..2fabd7b10 100644
--- a/tns-core-modules/ui/search-bar/search-bar.d.ts
+++ b/tns-core-modules/ui/search-bar/search-bar.d.ts
@@ -68,7 +68,7 @@ export class SearchBar extends View {
     on(event: "close", callback: (args: EventData) => void, thisArg?: any);
 
     /**
-     * Hides the soft input method, ususally a soft keyboard.
+     * Hides the soft input method, usually a soft keyboard.
      */
     dismissSoftInput(): void;
 }
diff --git a/tns-core-modules/ui/tab-view/tab-view.d.ts b/tns-core-modules/ui/tab-view/tab-view.d.ts
index 990057e46..8b0873a2e 100644
--- a/tns-core-modules/ui/tab-view/tab-view.d.ts
+++ b/tns-core-modules/ui/tab-view/tab-view.d.ts
@@ -130,5 +130,5 @@ export const tabTextColorProperty: CssProperty<Style, Color>;
 export const tabBackgroundColorProperty: CssProperty<Style, Color>;
 export const selectedTabTextColorProperty: CssProperty<Style, Color>;
 export const androidSelectedTabHighlightColorProperty: CssProperty<Style, Color>;
-export const androidOffscreenTabLimitProperty: Property<TabView, number>
+export const androidOffscreenTabLimitProperty: Property<TabView, number>;
 export const iosIconRenderingModeProperty: Property<TabView, "automatic" | "alwaysOriginal" | "alwaysTemplate">;
diff --git a/tns-core-modules/ui/web-view/web-view.d.ts b/tns-core-modules/ui/web-view/web-view.d.ts
index 542ae0b98..891c46f34 100644
--- a/tns-core-modules/ui/web-view/web-view.d.ts
+++ b/tns-core-modules/ui/web-view/web-view.d.ts
@@ -70,7 +70,7 @@ export class WebView extends View {
     goForward();
 
     /**
-     * Reload the current url.
+     * Reloads the current url.
      */
     reload();
 
@@ -101,10 +101,12 @@ export interface LoadEventData extends EventData {
      * Gets the url of the web-view.
      */
     url: string;
+
     /**
      * Gets the navigation type of the web-view.
      */
     navigationType: NavigationType;
+
     /**
      * Gets the error (if any). 
      */
diff --git a/tns-core-modules/utils/utils.d.ts b/tns-core-modules/utils/utils.d.ts
index 06b075b25..48bd9b176 100644
--- a/tns-core-modules/utils/utils.d.ts
+++ b/tns-core-modules/utils/utils.d.ts
@@ -41,36 +41,43 @@ export module layout {
     export var UNSPECIFIED: number;
     export var EXACTLY: number;
     export var AT_MOST: number;
+
     /**
-     * Gets measure specification mode from a given specification as string.
+     * Gets layout mode from a given specification as string.
      * @param mode - The measure specification mode.
      */
     export function getMode(mode: number): string;
+
     /**
      * Gets measure specification mode from a given specification.
      * @param spec - The measure specification.
      */
     export function getMeasureSpecMode(spec: number): number;
+
     /**
      * Gets measure specification size from a given specification.
      * @param spec - The measure specification.
      */
     export function getMeasureSpecSize(spec: number): number;
+
     /**
      * Creates measure specification size from size and mode.
      * @param size - The size component of measure specification.
      * @param mode - The mode component of measure specification.
      */
     export function makeMeasureSpec(px: number, mode: number): number;
+
     /**
      * Gets display density for the current device.
      */
     export function getDisplayDensity(): number;
+
     /**
      * Convert device independent pixels to device pixels - dip to px.
      * @param value - The pixel to convert.
      */
     export function toDevicePixels(value: dip): px;
+
     /**
      * Convert device pixels to device independent pixels - px to dip.
      * @param value - The pixel to convert.
@@ -79,7 +86,7 @@ export module layout {
 
     /**
      * Rounds value used in layout.
-     * @param value to round.
+     * @param px to round.
      */
     export function round(px: px): px;
 
@@ -121,12 +128,12 @@ export module ad {
     export function getInputMethodManager(): any /* android.view.inputmethod.InputMethodManager */;
 
     /**
-     * Hides the soft input method, ususally a soft keyboard.
+     * Hides the soft input method, usually a soft keyboard.
      */
     export function dismissSoftInput(nativeView?: any /* android.view.View */): void;
 
     /**
-     * Shows the soft input method, ususally a soft keyboard.
+     * Shows the soft input method, usually a soft keyboard.
      */
     export function showSoftInput(nativeView: any /* android.view.View */): void;
 
@@ -139,6 +146,7 @@ export module ad {
          * @param str - An array of strings to convert.
          */
         export function stringArrayToStringSet(str: string[]): any;
+
         /**
          * Converts string hash set into array of strings.
          * @param stringSet - A string hash set to convert.
@@ -155,6 +163,7 @@ export module ad {
          * @param name - Name of the resource.
          */
         export function getDrawableId(name);
+
         /**
          * Gets the string id from a given name.
          * @param name - Name of the resource.
@@ -206,9 +215,10 @@ export module ios {
          * @param str - JavaScript string array to convert.
          */
         export function jsArrayToNSArray(str: string[]): any;
+
         /**
          * Converts NSArray to JavaScript array.
-         * @param str - NSArray to convert.
+         * @param a - NSArray to convert.
          */
         export function nsArrayToJSArray(a: any): string[];
     }
@@ -217,6 +227,7 @@ export module ios {
      * Gets an information about if current mode is Landscape.
      */
     export function isLandscape(): boolean;
+
     /**
      * Gets the iOS device major version (for 8.1 will return 8).
      */
@@ -265,14 +276,13 @@ export function escapeRegexSymbols(source: string): string
 export function convertString(value: any): any
 
 /**
- * Sorts an array by using merge sort algoritm (which ensures stable sort since the built-in Array.sort() does not promise a stable sort).
+ * Sorts an array by using merge sort algorithm (which ensures stable sort since the built-in Array.sort() does not promise a stable sort).
  * @param arr - array to be sorted
  * @param compareFunc - function that will be used to compare two elements of the array
  */
 export function mergeSort(arr: Array<any>, compareFunc: (a: any, b: any) => number): Array<any>
 
 /**
- * 
  * Checks if array has any duplicate elements.
  * @param arr - The array to be checked.
  */