The 21-minute timer offers a focused learning burst ideal for knowledge retention. Feeling overwhelmed by a large textbook chapter? Set the timer and utilize the focused period to actively engage with the material, highlighting key points and summarizing concepts. The slightly offbeat duration can help you approach the learning with fresh eyes and potentially improve information recall. Additionally, the 21-minute timer can be used for practicing short bursts of focused meditation or completing a series of yoga poses that require sustained concentration.