diff --git a/types/react-native-appsflyer/index.d.ts b/types/react-native-appsflyer/index.d.ts
new file mode 100644
index 0000000000..b57b173607
--- /dev/null
+++ b/types/react-native-appsflyer/index.d.ts
@@ -0,0 +1,96 @@
+// Type definitions for react-native-appsflyer 5.1
+// Project: https://github.com/AppsFlyerSDK/react-native-appsflyer#readme
+// Definitions by: Fabian Lee <https://github.com/fabianlee1211>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.8
+
+export interface InitSdkOptions {
+    devKey: string;
+    isDebug: boolean;
+    appId: string;
+}
+
+export interface ConversionData {
+    status: 'success' | 'failure';
+    type: string;
+    data: {
+        is_first_launch: boolean;
+        af_status: 'Organic' | 'Non-organic';
+        af_referrer_uid?: string;
+        af_referrer_customer_id?: string;
+        media_source: string;
+        [key: string]: any;
+    };
+}
+
+export enum EmailCryptType {
+    EmailCryptTypeNone = 0,
+    EmailCryptTypeSHA1 = 1,
+    EmailCryptTypeMD5 = 2,
+    EmailCryptTypeSHA256 = 3,
+}
+
+export interface EmailOptions {
+    emailsCryptType: EmailCryptType;
+    emails: string[];
+}
+
+export interface InviteLinkOptions {
+    channel?: string;
+    customerID?: string;
+    campaign?: string;
+    referrerName?: string;
+    referrerImageUrl?: string;
+    deeplinkPath?: string;
+    baseDeeplink?: string;
+    userParams?: {
+        [key: string]: any;
+    };
+}
+
+type SuccessCallback = (success: any) => void;
+
+type ErrorCallback = (error: any) => void;
+
+interface AdditionalData {
+    [key: string]: any;
+}
+
+interface EventValues {
+    [key: string]: any;
+}
+
+declare namespace appsFlyer {
+    function initSdk(options: InitSdkOptions, success?: SuccessCallback, error?: ErrorCallback): void | Promise<string>;
+    function trackAppLaunch(): void;
+    function onInstallConversionData(callback: (data: ConversionData) => void): () => void;
+    function onAppOpenAttribution(callback: (response: any) => void): () => void;
+    function sendDeepLinkData(url: string): void;
+    function stopTracking(isStopTracking: boolean, callback?: SuccessCallback): void;
+    function generateInviteLink(options: InviteLinkOptions, success?: SuccessCallback, error?: ErrorCallback): void;
+    function updateServerUninstallToken(token: string, callback?: SuccessCallback): void;
+    function trackLocation(
+        longitude: number,
+        latitude: number,
+        callback?: (error: any, coordinates: number[]) => void,
+    ): void;
+    function trackCrossPromotionImpression(appId: string, campaign: string): void;
+    function trackAndOpenStore(appId: string, campaign: string, additionalData?: AdditionalData): void;
+    function trackEvent(
+        eventName: string,
+        eventValues: EventValues,
+        success?: SuccessCallback,
+        error?: ErrorCallback,
+    ): void | Promise<string>;
+    function getAppsFlyerUID(callback: (error: any, appsFlyerUID: string) => void): void;
+    function setUserEmails(options: EmailOptions, success?: SuccessCallback, error?: ErrorCallback): void;
+    function setAdditionalData(additionalData: AdditionalData, success?: SuccessCallback): void;
+    function setCustomerUserId(userId: string, callback?: SuccessCallback): void;
+    function setCollectIMEI(isCollect: boolean, callback?: SuccessCallback): void;
+    function setCollectAndroidID(isCollect: boolean, callback?: SuccessCallback): void;
+    function setAppInviteOneLinkID(oneLinkId: string, callback?: SuccessCallback): void;
+    function setCurrencyCode(currencyCode: string, callback?: SuccessCallback): void;
+    function setDeviceTrackingDisabled(isDeviceTrackingDisabled: boolean, success?: SuccessCallback): void;
+}
+
+export default appsFlyer;
diff --git a/types/react-native-appsflyer/react-native-appsflyer-tests.ts b/types/react-native-appsflyer/react-native-appsflyer-tests.ts
new file mode 100644
index 0000000000..561297cad7
--- /dev/null
+++ b/types/react-native-appsflyer/react-native-appsflyer-tests.ts
@@ -0,0 +1,64 @@
+import appsFlyer, { EmailCryptType } from 'react-native-appsflyer';
+
+// $ExpectType void | Promise<string>
+appsFlyer.initSdk({ devKey: '1A2b3C', appId: 'app_id', isDebug: true });
+
+// $ExpectType void
+appsFlyer.getAppsFlyerUID((error, appsFlyerId) => {});
+
+// $ExpectType () => void
+appsFlyer.onAppOpenAttribution(res => {});
+
+// $ExpectType () => void
+appsFlyer.onInstallConversionData(res => {});
+
+// $ExpectType void
+appsFlyer.sendDeepLinkData('https://reactjs.org');
+
+// $ExpectType void
+appsFlyer.setAdditionalData({});
+
+// $ExpectType void
+appsFlyer.setAppInviteOneLinkID('ABCD');
+
+// $ExpectType void
+appsFlyer.setCollectAndroidID(true);
+
+// $ExpectType void
+appsFlyer.setCollectIMEI(true);
+
+// $ExpectType void
+appsFlyer.setCurrencyCode('USD');
+
+// $ExpectType void
+appsFlyer.setCustomerUserId('my_user_id');
+
+// $ExpectType void
+appsFlyer.setUserEmails({ emails: [], emailsCryptType: EmailCryptType.EmailCryptTypeNone });
+
+// $ExpectType void
+appsFlyer.stopTracking(true);
+
+// $ExpectType void
+appsFlyer.trackAndOpenStore('app_id', 'testing');
+
+// $ExpectType void
+appsFlyer.trackAppLaunch();
+
+// $ExpectType void
+appsFlyer.trackCrossPromotionImpression('app_id', 'testing');
+
+// $ExpectType void | Promise<string>
+appsFlyer.trackEvent('af_testing', {});
+
+// $ExpectType void
+appsFlyer.trackLocation(100.1, 120.3);
+
+// $ExpectType void
+appsFlyer.updateServerUninstallToken('token');
+
+// $ExpectType void
+appsFlyer.generateInviteLink({});
+
+// $ExpectType void
+appsFlyer.setDeviceTrackingDisabled(true);
diff --git a/types/react-native-appsflyer/tsconfig.json b/types/react-native-appsflyer/tsconfig.json
new file mode 100644
index 0000000000..1d44f3c5e8
--- /dev/null
+++ b/types/react-native-appsflyer/tsconfig.json
@@ -0,0 +1,23 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictFunctionTypes": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "react-native-appsflyer-tests.ts"
+    ]
+}
diff --git a/types/react-native-appsflyer/tslint.json b/types/react-native-appsflyer/tslint.json
new file mode 100644
index 0000000000..3db14f85ea
--- /dev/null
+++ b/types/react-native-appsflyer/tslint.json
@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }