Starting piano with a metronome? Tempo drift is common at first.
This page uses 80 BPM as an example slow-practice tempo. Many beginner drills sit in a similar range so you can hear every note against the click. It is not a universal “official starting speed,” and slower is not automatically “too dragging.” Follow your score and your teacher; you can change BPM in the app.
The preset is 80 BPM, 4/4, traditional drum: only beat 1 of each bar is the strong click, the next three are weak. Use that to find the downbeat, then nudge the tempo when the line is clean.
The button below opens the app with this preset. Stay as long as you need; there is no required weekly schedule.
The app pre-sets to 80 BPM, 4/4, traditional mode. To adjust, use the controls inside the app after it loads.