Why one habit beats a list of fifteen
Setting up a habit tracker is enjoyable. You add meditation, water, reading, stretching, journalling — and the setup itself feels like progress. That feeling is the problem.
Setup is not progress
Adding a habit costs nothing and delivers a small hit of accomplishment, so people add far more than they can sustain. The list becomes a monument to intentions rather than a record of behaviour.
Within a fortnight most rows are red. At that point opening the app means looking at evidence of failure, so you stop opening it.
Attention is the scarce resource
You do not have a willpower budget spread evenly across fifteen behaviours. In practice one or two get real attention and the rest are noise competing for the same glance.
Removing the others is not a loss. It is a decision about which one actually matters this month, made once, deliberately.
Add the second habit later, if at all
The point of tracking is to make a behaviour automatic enough that tracking stops being necessary. When that happens, the slot frees up.
That is a far better sequence than starting eight at once and keeping none — and it is why OneStreak has no way to add a second habit at all.
Tracking one habit is less fun to set up and much more likely to still be running in three months.