I am currently using KDDI’s Calendar Plus Plug-in Ver 1.6.0 to generate a Calendar display.
Is there a way to customize the Plug-in generated Calendar display?
As mentioned before, contact the KDDI America team for support regarding their Calendar Plus Plug-in.
Or should I build a Custom View?
That is up to you. We can provide support while you build out your Custom View.
Alternatively, try the Kintone Native Calendar Ver. 1.6.0 Plug-in. Perhaps you prefer their styling.