Multitasking
Several ordinary tasks share one clock. The free run is two tasks for 45 seconds. Paid runs add a code and bring the next card sooner, which is the part people drop.
This variant is in the paid set. The free drill on this page stays open.
See pricingWhat to notice afterwards
Write down the panel you skipped, not the score alone. Most misses are a gauge that went red while you were still typing a sum, or a code you rehearsed and then failed to type when asked. The next session, protect that panel first. One focused repeat beats five rushed ones.