What self-help apps would you recommend for mental clarity and focus?

[nojim89390]

I'm looking for suggestions on self-help apps that genuinely improve mental clarity, focus, and overall cognitive performance in daily life, especially in distracting environments. Which apps have you found most helpful for staying focused during work or study sessions, and which features make the biggest difference for you? Do you rely more on structured apps like planners or on mindfulness and meditation tools for improving concentration? I'd love to hear practical recommendations based on real experience. Also curious about any underrated apps people often overlook. Thanks! Your insights would be really helpful.