How I can Syncronize a Database from SQL betwen 2 servers

I have an app and a website as Frontend that work on the same database … Lets say as Example Facebook app and facebook Website.

What I would like to do and I m already few days working on it , is :

1. have server A where all the query from the apps IOS and Android are on it
2. have server B where all the query form the website are on it
3. find a way that the same database DATABASE1 can sync live at any interaction

Like that i will have full resource of the servers for each different job , APPS or Website

i Read about “Master Slave Replication in MySQL” but seems that can make only a copy from server A to B and server B if change any data is not sync with A , my need is That serve A and B can sync live with their data .

Honestly I have no idea what kind of setup can handle this best.

I’m open to any suggestions (alternative setups) and/or links to any tutorials to set this up successfully.