You can use an app named as "Zapya" and follow these steps.
1- Install Zapya on android and ios.
2- Connect both devices to same wifi network.
3- After installation open Zapya in android and tap Create Group.
4- Going to the menu will show you connect to ios. You'll see the name of the network and the host device there.
5- On iOS, Choose Search and join in the pop-up menu, and tap on the device name listed on the Android app.