Your smartphone can be a hand-held way to keep calm. Using apps to help calm your mind is easy. There are apps for meditation, sleep monitoring, and noise reduction. Most are no-cost or low-cost and work on most phones.
To meditate is to focus on one thing for a period of time with your full attention. That’s why worry could be considered a form of meditation. Your focus on your worries is, in fact, meditation. How about switching that focus?