The Blynk app builder is currently available for Android and iOS platforms. The following steps explain how to install the Blynk app builder on your Android smartphone or tablet:

1. Tap the apps icon in the lower-right corner of the home screen (consider that this is the default location).
2. Swipe left and right until you find the Play Store icon.
3. Tap the Play Store icon.
4. The first time you open the Play Store, you may be prompted to sign in with your Google credentials. If you still don't have a Google account, you can create a free account with Google.
5. Once you sign in with Google Play Store, you can search for a specific app.
6. Tap the magnifying glass in the upper-right corner, type in the name blynk, and tap the magnifying glass on the keyboard to execute the search. You will get a result on the screen as follows:

7. Tap INSTALL to start the installation process. Also, you can find more information about the app by tapping the MORE INFO button:

8. Tap ACCEPT to allow the Blynk app to access some resources on your mobile device:

9. The installation process will take some time depending on the bandwidth of your internet connection.
10. After completing the installation, you can open the Blynk app by tapping on the OPEN button with Google Play. This will help you to open the Blynk app builder for the first time without moving to the home screen of your smartphone or tablet:

11. After installation, an application icon associated with the Blynk app builder can be found on the home screen of your smartphone or tablet: