STEP BY STEP APP CREATION / FIREBASE SDK / ANDROID STUDIO

1. Prerequisites.

2. Step 1 : Create a Firebase project.

3. Step 2 : Register your app with Firebase.

4. Step 3 : Add Firebase SDKs and initialize Firebase. Firebase config object.

5. Step 4 : (Optional) Install CLI and deploy to Firebase Hosting.

6. Step 5 : Access Firebase in your app.

7. Available libraries.

8. Additional setup options.

EXTERNAL LINKS

MORE EXTERNAL LINKS https://www.apps-builder.com/

Here are the steps to help you create your own app for free:

1. Put your app idea on paper

2. Diligent market research

3. Create app prototypes

4. Design app graphics

5. Make your free app

6. Test your app

7. Go live on app stores

8. Market your app

9. Get user feedback

programming languages for mobile apps: ( Academy )

https://www.appypie.com/top-programming-languages-for-mobile-app-development

Top 20 Mobile App Development Platforms and Tools

1. Flutter

2. CoronaSDK

3. Appy Pie ( Academy ) / Slack & Microsoft Teams / Get started with MT : https://teams.microsoft.com/start / Use Slack : Slack.com / SIGN IN

4. NativeScript

5. MobileAngularUI

6. LongRange

7. Experitest

8. HeadSpin

9. AppWatch

10. Vuforia

11. EasyAR

12. TensorFlow

13. IBMWatson

14. UnityAds

15. AppyJump

16. UrbanAirship

17. Pusher

18. KendoUI

19. OnsenUI

20. Firebase

14 Best Cross Platform Mobile App Development Tools and Platforms

1. IntelXDK

2. ReactNative

3. Ionic

4. Xamarin

5. PhoneGap

6. MonoCross

7. AdobeBuild

8. KonyAppPlatform

9. Convertigo

10. Qt

11. Appcelerator

12. RhoMobileSuite

13. AlphaAnywhere

14. Sencha

Best 21 Mobile Game Engines & Development Platforms and Tools

1. CoronaLabs

2. SpriteKit

3. Unity

4. Cocos2D

5. Marmalade

6. AmazonLumberyard

7. CryEngine

8. NextPeer

9. Haxe

10. Gideros

11. Titanium

12. PowerVRGraphicsSDK

13. ProjectAnarchy

14. MonoGame

15. CocoonJS

16. GameMakerStudio2

17. UnrealEngine

18. Buildbox

19. AppGameKit

20. Construct2

21. Fusion