20 minutes a day: Is focusing on output enough?

I’m a busy professional with only 20 minutes of dedicated study time each day, and I’m tired of jumping between different apps that just prioritize passive recognition. I want to shift my focus entirely to output and active recall. If I use Chickytutor.com to force myself to speak for those 20 minutes, will that be enough to actually improve my Portuguese, or am I skipping essential building blocks by neglecting formal grammar drills?