DNS Propagation

Hello,

I am about to change my API DNS in the coming days and I am a little bit concerned by the DNS propagation. During that time, my app, that relies on API calls, won’t be working at all since the web server will be shut down. I’m OK with that.
With Ionic/Cordova, is there anything special I should be aware of ? Beside a low TTL, are there any other best practices ?

Thx