Do I need to download an app to watch The domineering crown prince falls in love with him?

No. It plays in any mobile or desktop browser, so there is nothing to install.

The domineering crown prince falls in love with him — Watch Free (19 Eps)

Where can I watch The domineering crown prince falls in love with him online for free?: The first 15 episodes are free on dramatap and play straight in your browser — no app download and no account needed. The rest of the episodes are part of dramatap VIP.
How many episodes does The domineering crown prince falls in love with him have?: 19 episodes in total.
Which app is The domineering crown prince falls in love with him originally from?: It was originally released on NetShort.
Do I need to download an app to watch The domineering crown prince falls in love with him?: No. It plays in any mobile or desktop browser, so there is nothing to install.