Get faster without getting sloppy. The speed trainer nudges the tempo up a few BPM at a time so you only ever play at the edge of your clean control — the real way to raise your ceiling.
Pushing your top speed by force just ingrains tension and uneven strokes — you plateau, fast. The fix is to climb in small steps and only move up when the current tempo is genuinely clean. Drumolo automates that ladder and grades your timing so you know when you've actually earned the next BPM.
Pick a rudiment such as the double stroke roll or single stroke roll, set a comfortable starting tempo, and let the trainer step you up. Stay relaxed, keep both hands even, and only chase the number once the pattern is solid.
It is a metronome that automatically increases the tempo in small steps as you play, so you build speed gradually while staying clean and relaxed.
Practice at the edge of your clean control, not your raw maximum. Raise the tempo a few BPM only once the current speed is even and accurate — which is exactly what the speed trainer enforces.