Do I need to download an app to watch After I Swapped the Marriage, the Commander Regretted?

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

After I Swapped the Marriage, the Commander Regretted — Watch Free (47 Eps)

Where can I watch After I Swapped the Marriage, the Commander Regretted 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 After I Swapped the Marriage, the Commander Regretted have?: 47 episodes in total.
Which app is After I Swapped the Marriage, the Commander Regretted originally from?: It was originally released on NetShort.
Do I need to download an app to watch After I Swapped the Marriage, the Commander Regretted?: No. It plays in any mobile or desktop browser, so there is nothing to install.