[solve] How to make two app with live sync data?

Currently build a Retail order system with ionic 3, and i try to build another app which when first app add something to the cart, and second app can see the cart data.

i wondering is there something can be live update http request to get the json data in real time?

Take a look at the javebratt blog.

Yes for using firebase can achieve the job, but all my project are run local server, and firebase required online. so i install socket.io in my local server, socket.io solve my problem, thanks for provide the information. : )