You can use to transfer contacts from iPhone to Android is using iCloud service. By using this way, you need to first sync your iPhone contacts to iCloud. After that, you need to export the files from iCloud to computer and then transfer to your Android device.

Also to know:how to transfer contacts from android to android

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Here is the tutorial: Transfer iPhone Contacts to a Samsung Galaxy J7 Plus

Share iPhone Contacts via iTunes:

NOTE: Using iTunes on a computer connected to the Internet you can share your iPhone contacts with your Google account, and then you can sync the account data – and contacts – with the Android phone.

1. Open iTunes on the PC
2. Connect the iPhone to the computer via USB
3. In iTunes, click the iPhone and go to “Info”
4. Enable “Sync Contacts With” and select “Google Contacts” from the drop-down menu
5. Sign in with your Google account or click “Configure” and select an existing account
6. Click “Apply” to begin the sync
7. After the sync is done, switch to the Android phone and log in with the same account used in iTunes
8. Allow the account to sync contacts with the Android device

Share iPhone Contacts form iCloud Backup:

NOTE: In case the contacts on your iPhone are backed up on your iCloud account, you can log in with the account on a computer connected to the Internet and export the contacts in a vCard file for Android use.

1. Launch the Internet browser on the computer
2. Head down to https://www.icloud.com/ and log in with your iCloud account
3. Access “Contacts” and select the contacts you want to share
4. Click “Settings” > “Export vCard”
5. After the vCard has been downloaded, follow one of the steps below:
   
   • Open the Internet browser on the computer and import the vCard to “Google Contacts” or:
   • Connect the Samsung device to your computer via USB, transfer the vCard to the phone storage and use “Contacts” to import its contents to your phonebook

Using My Contacts Backup:

NOTE: Although the methods above require a computer with Internet access, alternatively you can share your iPhone contacts using third-party apps. My Contacts Backup is an iOS third-party app that can be used to back up and share iPhone contacts via email.

1. Install My Contacts Backup on the iPhone via the App Store
2. Launch the app and tap “Backup” to create a vCard of your iPhone contacts
3. After the backup file is done, tap “Email”
4. Write a new email ensuring the vCard is attached
5. Send the email to your own address and switch to the Samsung device
6. Open the email and download the vCard attachment
7. Import the vCard to your phonebook using “Contacts”

Using Send Anywhere:

NOTE: Another app you can use is Send Anywhere, available on Android and iOS. The app uses a peer-2-peer connection to share contacts and other file types cross-platform without requiring computer access.

1. Visit the App Store and install Send Anywhere on the iPhone
2. Go to the Play Store and install the app on the Android device
3. Open the app on both devices
4. On the iPhone, tap “Send” > “Contacts”
5. Select the desired contacts
6. Tap “Send”
7. Select a transfer method on one of the devices and follow the on-screen prompts to complete the process