Transfert data between 2 ionic mobile app

hello , how can i transfer data between 2 ionic app without using firebase , i thought about deep link but didn’t work , any suggestion please and thanks

I have a couple of methods I’ve used. First is AppLinks, which admittedly requires a lot of setup. The other is to save data as JSON, then open and parse it on the other device, using the clipboard plugin to copy on one device and paste on the other (though not required).