diff --git a/types/expo/expo-tests.tsx b/types/expo/expo-tests.tsx
index 564611bb60..fa329ea8e3 100644
--- a/types/expo/expo-tests.tsx
+++ b/types/expo/expo-tests.tsx
@@ -223,8 +223,8 @@ Audio.RECORDING_OPTIONS_PRESET_HIGH_QUALITY;
 Audio.RECORDING_OPTIONS_PRESET_LOW_QUALITY;
 async () => {
     const result = await Audio.Sound.create({uri: 'uri'}, {
-        volume: 0.5,
-        rate: 0.6
+        volume: 0.55,
+        rate: 16.5
     }, null, true);
 
     const sound = result.sound;
@@ -267,8 +267,8 @@ const barcodeReadCallback = () => {};
 );
 
 async () => {
-    await Brightness.setBrightnessAsync(.6);
-    await Brightness.setSystemBrightnessAsync(.7);
+    await Brightness.setBrightnessAsync(0.65);
+    await Brightness.setSystemBrightnessAsync(0.75);
     const br1 = await Brightness.getBrightnessAsync();
     const br2 = await Brightness.getSystemBrightnessAsync();
 };
@@ -376,7 +376,7 @@ async () => {
     const result = await ImageManipulator.manipulate('url', {
         rotate: 90
     }, {
-        compress: 0.5
+        compress: 0.75
     });
 
     result.height;
diff --git a/types/expo/index.d.ts b/types/expo/index.d.ts
index 641c3f1ded..dd7057b007 100644
--- a/types/expo/index.d.ts
+++ b/types/expo/index.d.ts
@@ -27,7 +27,6 @@ import {
 
 export type Axis = number;
 export type BarCodeReadCallback = (params: { type: string; data: string; }) => void;
-export type FloatFromZeroToOne = 0 | 0.1 | 0.2 | 0.3 | 0.4 | 0.5 | 0.6 | 0.7 | 0.8 | 0.9 | 1;
 export type Md5 = string;
 export type Orientation = 'portrait' | 'landscape';
 export type RequireSource = ImageRequireSource;
@@ -550,14 +549,16 @@ export type PlaybackStatus = {
 
 export interface PlaybackStatusToSet {
     androidImplementation?: string;
-    progressUpdateIntervalMillis?: number;
-    positionMillis?: number;
-    shouldPlay?: boolean;
-    rate?: FloatFromZeroToOne;
-    shouldCorrectPitch?: boolean;
-    volume?: FloatFromZeroToOne;
-    isMuted?: boolean;
     isLooping?: boolean;
+    isMuted?: boolean;
+    positionMillis?: number;
+    progressUpdateIntervalMillis?: number;
+    /** The desired playback rate of the media. This value must be between `0.0` and `32.0`. Only available on Android API version 23 and later and iOS. */
+    rate?: number;
+    shouldCorrectPitch?: boolean;
+    shouldPlay?: boolean;
+    /** A number between `0.0` (silence) and `1.0` (maximum volume). */
+    volume?: number;
 }
 
 export type PlaybackSource = RequireSource | { uri: string } | Asset;
@@ -670,7 +671,6 @@ export class PlaybackObject {
     setRateAsync(
         /** The desired playback rate of the media. This value must be between `0.0` and `32.0`. Only available on Android API version 23 and later and iOS. */
         rate: number,
-
         /** A boolean describing if we should correct the pitch for a changed rate. If set to `true`, the pitch of the audio will be corrected (so a rate different than `1.0` will timestretch the audio). */
         shouldCorrectPitch: boolean
     ): Promise<PlaybackStatus>;
@@ -732,13 +732,32 @@ export class BlurView extends Component<BlurViewProps> { }
 // #endregion
 
 /**
- * Brightness
+ * An API to get and set screen brightness.
  */
 export namespace Brightness {
-    function setBrightnessAsync(brightnessValue: FloatFromZeroToOne): Promise<void>;
-    function getBrightnessAsync(): Promise<FloatFromZeroToOne>;
-    function getSystemBrightnessAsync(): Promise<FloatFromZeroToOne>;
-    function setSystemBrightnessAsync(brightnessValue: FloatFromZeroToOne): Promise<void>;
+    /** Sets screen brightness. */
+    function setBrightnessAsync(
+        /** A number between `0` and `1`, representing the desired screen brightness. */
+        brightnessValue: number
+    ): Promise<void>;
+
+    /**
+     * Gets screen brightness.
+     * @returns A Promise that is resolved with a number between `0` and `1`, representing the current screen brightness.
+     */
+    function getBrightnessAsync(): Promise<number>;
+
+    /**
+     * Gets global system screen brightness.
+     * @returns A Promise that is resolved with a number between `0` and `1`, representing the current system screen brightness.
+     */
+    function getSystemBrightnessAsync(): Promise<number>;
+
+    /** Sets global system screen brightness, requires `WRITE_SETTINGS` permissions on Android. */
+    function setSystemBrightnessAsync(
+        /** A number between `0` and `1`, representing the desired screen brightness. */
+        brightnessValue: number
+    ): Promise<void>;
 }
 
 // #region Camera
@@ -771,22 +790,24 @@ export class CameraObject {
 }
 
 export interface CameraProps extends ViewProps {
-    zoom?: FloatFromZeroToOne;
-    ratio?: string;
-    focusDepth?: FloatFromZeroToOne;
-    type?: string | number;
-    onCameraReady?: () => void;
-    onBarCodeRead?: BarCodeReadCallback;
+    autoFocus?: string | number | boolean;
+    barCodeTypes?: Array<string | number>;
+    faceDetectionClassifications?: number;
+    faceDetectionLandmarks?: number;
     faceDetectionMode?: number;
     flashMode?: string | number;
-    barCodeTypes?: Array<string | number>;
-    whiteBalance?: string | number;
-    faceDetectionLandmarks?: number;
-    autoFocus?: string | number | boolean;
-    faceDetectionClassifications?: number;
-    onMountError?: () => void;
+    /** Distance to plane of sharpest focus. A value between `0` and `1`. `0`: infinity focus, `1`: focus as close as possible. Default: `0`. For Android this is available only for some devices and when `useCamera2Api` is set to `true`. */
+    focusDepth?: number;
+    onBarCodeRead?: BarCodeReadCallback;
+    onCameraReady?: () => void;
     onFacesDetected?: (options: { faces: TrackedFaceFeature[] }) => void;
+    onMountError?: () => void;
+    ratio?: string;
     ref?: Ref<CameraObject>;
+    type?: string | number;
+    whiteBalance?: string | number;
+    /** A value between `0` and `1` being a percentage of device's max zoom. `0`: not zoomed, `1`: maximum zoom. Default: `0`. */
+    zoom?: number;
 }
 
 export interface CameraConstants {
@@ -1501,7 +1522,8 @@ export namespace ImageManipulator {
 
     interface SaveOptions {
         base64?: boolean;
-        compress?: FloatFromZeroToOne;
+        /** A value in range `0` - `1` specifying compression level of the result image. `1` means no compression and `0` the highest compression. */
+        compress?: number;
         format?: 'jpeg' | 'png';
     }