diff --git a/packages/cli/src/tools/generator/copyProjectTemplateAndReplace.js b/packages/cli/src/tools/generator/copyProjectTemplateAndReplace.ts
similarity index 89%
rename from packages/cli/src/tools/generator/copyProjectTemplateAndReplace.js
rename to packages/cli/src/tools/generator/copyProjectTemplateAndReplace.ts
index 285cce5d3..1646d18ec 100644
--- a/packages/cli/src/tools/generator/copyProjectTemplateAndReplace.js
+++ b/packages/cli/src/tools/generator/copyProjectTemplateAndReplace.ts
@@ -9,13 +9,22 @@
 
 import chalk from 'chalk';
 import path from 'path';
+// @ts-ignore FIXME: copyAndReplace should be ts
 import copyAndReplace from '../copyAndReplace';
 import promptInitializer from './promptSync';
+// @ts-ignore FIXME: walk should be ts
 import walk from '../walk';
 import {logger} from '@react-native-community/cli-tools';
 
 const prompt = promptInitializer();
 
+type Options = {
+  upgrade?: boolean;
+  force?: boolean;
+  displayName?: string;
+  ignorePaths?: string[];
+};
+
 /**
  * Util for creating a new React Native project.
  * Copy the project from a template and use the correct project name in
@@ -31,10 +40,10 @@ const prompt = promptInitializer();
  *        }
  */
 function copyProjectTemplateAndReplace(
-  srcPath,
-  destPath,
-  newProjectName,
-  options = {},
+  srcPath: string,
+  destPath: string,
+  newProjectName: string,
+  options: Options = {},
 ) {
   if (!srcPath) {
     throw new Error('Need a path to copy from');
@@ -46,7 +55,7 @@ function copyProjectTemplateAndReplace(
     throw new Error('Need a project name');
   }
 
-  walk(srcPath).forEach(absoluteSrcFilePath => {
+  walk(srcPath).forEach((absoluteSrcFilePath: string) => {
     // 'react-native upgrade'
     if (options.upgrade) {
       // Don't upgrade these files
@@ -90,7 +99,7 @@ function copyProjectTemplateAndReplace(
 
     let contentChangedCallback = null;
     if (options.upgrade && !options.force) {
-      contentChangedCallback = (_, contentChanged) =>
+      contentChangedCallback = (_destPath: string, contentChanged: string) =>
         upgradeFileContentChangedCallback(
           absoluteSrcFilePath,
           relativeFilePath,
@@ -118,7 +127,7 @@ function copyProjectTemplateAndReplace(
  * This is especially important for .gitignore because npm has some special
  * behavior of automatically renaming .gitignore to .npmignore.
  */
-function translateFilePath(filePath) {
+function translateFilePath(filePath: string) {
   if (!filePath) {
     return filePath;
   }
@@ -135,9 +144,9 @@ function translateFilePath(filePath) {
 }
 
 function upgradeFileContentChangedCallback(
-  absoluteSrcFilePath,
-  relativeDestPath,
-  contentChanged,
+  absoluteSrcFilePath: string,
+  relativeDestPath: string,
+  contentChanged: string,
 ) {
   if (contentChanged === 'new') {
     logger.info(`${chalk.bold('new')} ${relativeDestPath}`);
diff --git a/packages/cli/src/tools/generator/promptSync.js b/packages/cli/src/tools/generator/promptSync.ts
similarity index 82%
rename from packages/cli/src/tools/generator/promptSync.js
rename to packages/cli/src/tools/generator/promptSync.ts
index 8c73a5a2c..bef753e5a 100644
--- a/packages/cli/src/tools/generator/promptSync.js
+++ b/packages/cli/src/tools/generator/promptSync.ts
@@ -12,19 +12,30 @@
 
 import fs from 'fs';
 
+type Options = {
+  echo?: string;
+  ask?: string;
+  value?: string;
+  autocomplete?: string[] | Function;
+};
+
 const term = 13; // carriage return
 
 function create() {
   return prompt;
 
-  function prompt(ask, value, opts) {
+  function prompt(
+    ask?: string | Options,
+    value?: string | Options,
+    opts?: Options,
+  ) {
     let insert = 0;
     opts = opts || {};
 
-    if (Object(ask) === ask) {
+    if (typeof ask === 'object') {
       opts = ask;
       ask = opts.ask;
-    } else if (Object(value) === value) {
+    } else if (typeof value === 'object') {
       opts = value;
       value = opts.value;
     }
@@ -32,13 +43,16 @@ function create() {
     const echo = opts.echo;
     const masked = 'echo' in opts;
 
+    /*eslint-disable prettier/prettier*/
     const fd =
       process.platform === 'win32'
+        // @ts-ignore
         ? process.stdin.fd
         : fs.openSync('/dev/tty', 'rs');
+    /*eslint-enable prettier/prettier*/
 
     const wasRaw = process.stdin.isRaw;
-    if (!wasRaw) {
+    if (!wasRaw && process.stdin.setRawMode) {
       process.stdin.setRawMode(true);
     }
 
@@ -54,7 +68,7 @@ function create() {
     }
 
     while (true) {
-      read = fs.readSync(fd, buf, 0, 3);
+      read = fs.readSync(fd, buf, 0, 3, null);
       if (read > 1) {
         // received a control sequence
         if (buf.toString()) {
@@ -76,7 +90,9 @@ function create() {
         process.stdout.write('^C\n');
         fs.closeSync(fd);
         process.exit(130);
-        process.stdin.setRawMode(wasRaw);
+        if (process.stdin.setRawMode) {
+          process.stdin.setRawMode(!!wasRaw);
+        }
         return null;
       }
 
@@ -130,7 +146,9 @@ function create() {
 
     process.stdout.write('\n');
 
-    process.stdin.setRawMode(wasRaw);
+    if (process.stdin.setRawMode) {
+      process.stdin.setRawMode(!!wasRaw);
+    }
 
     return str || value || '';
   }
diff --git a/packages/cli/src/tools/generator/templates.js b/packages/cli/src/tools/generator/templates.ts
similarity index 90%
rename from packages/cli/src/tools/generator/templates.js
rename to packages/cli/src/tools/generator/templates.ts
index 76b43632f..4ff6370af 100644
--- a/packages/cli/src/tools/generator/templates.js
+++ b/packages/cli/src/tools/generator/templates.ts
@@ -13,7 +13,6 @@ import fs from 'fs';
 import path from 'path';
 import copyProjectTemplateAndReplace from './copyProjectTemplateAndReplace';
 import {logger} from '@react-native-community/cli-tools';
-// $FlowFixMe - converted to TS
 import * as PackageManager from '../packageManager';
 
 /**
@@ -27,7 +26,6 @@ async function createProjectFromTemplate(
   destPath: string,
   newProjectName: string,
   template: string,
-  destinationRoot: string,
 ) {
   const templatePath = path.dirname(require.resolve('react-native/template'));
   copyProjectTemplateAndReplace(templatePath, destPath, newProjectName);
@@ -45,12 +43,7 @@ async function createProjectFromTemplate(
   // This way we don't have to duplicate the native files in every template.
   // If we duplicated them we'd make RN larger and risk that people would
   // forget to maintain all the copies so they would go out of sync.
-  await createFromRemoteTemplate(
-    template,
-    destPath,
-    newProjectName,
-    destinationRoot,
-  );
+  await createFromRemoteTemplate(template, destPath, newProjectName);
 }
 
 /**
@@ -62,7 +55,6 @@ async function createFromRemoteTemplate(
   template: string,
   destPath: string,
   newProjectName: string,
-  destinationRoot: string,
 ) {
   let installPackage;
   let templateName;
@@ -92,8 +84,8 @@ async function createFromRemoteTemplate(
         'devDependencies.json',
       ],
     });
-    await installTemplateDependencies(templatePath, destinationRoot);
-    await installTemplateDevDependencies(templatePath, destinationRoot);
+    await installTemplateDependencies(templatePath);
+    await installTemplateDevDependencies(templatePath);
   } finally {
     // Clean up the temp files
     try {
@@ -109,7 +101,7 @@ async function createFromRemoteTemplate(
   }
 }
 
-async function installTemplateDependencies(templatePath, destinationRoot) {
+async function installTemplateDependencies(templatePath: string) {
   // dependencies.json is a special file that lists additional dependencies
   // that are required by this template
   const dependenciesJsonPath = path.resolve(templatePath, 'dependencies.json');
@@ -119,7 +111,7 @@ async function installTemplateDependencies(templatePath, destinationRoot) {
     return;
   }
 
-  let dependencies;
+  let dependencies: any;
   try {
     dependencies = require(dependenciesJsonPath);
   } catch (err) {
@@ -135,7 +127,7 @@ async function installTemplateDependencies(templatePath, destinationRoot) {
   execSync('react-native link', {stdio: 'inherit'});
 }
 
-async function installTemplateDevDependencies(templatePath, destinationRoot) {
+async function installTemplateDevDependencies(templatePath: string) {
   // devDependencies.json is a special file that lists additional develop dependencies
   // that are required by this template
   const devDependenciesJsonPath = path.resolve(
@@ -148,7 +140,7 @@ async function installTemplateDevDependencies(templatePath, destinationRoot) {
     return;
   }
 
-  let dependencies;
+  let dependencies: any;
   try {
     dependencies = require(devDependenciesJsonPath);
   } catch (err) {