The reason your bar is shown beside someone else’s

Your reading progress used to be yours alone — a bar that filled at whatever pace suited you. Then the app put a friend’s bar beside it. Now you read to stay ahead, or to catch up, and the pace that once felt comfortable feels slow or fast only in relation to a line moving next to yours.

What everyone sees

Showing a peer’s bar beside your own looks like a social feature — a bit of friendly visibility, a way to feel connected. It changes what the bar is. A solo bar measures you against your own goal; a paired bar measures you against a person, converting a private target into a competitive comparison, and comparison recruits a drive to not fall behind that a personal goal never engages.

What is actually happening

Festinger’s theory of social comparison held that people have a basic drive to evaluate themselves against others, especially similar others, and that such comparisons shape effort and self-assessment in ways absolute standards do not. Garcia, Tor and Schiff’s analysis of competition showed that mere proximity in a comparison — being close to a rival on a shared measure — sharply intensifies competitive motivation, so a nearby peer bar generates more effort than a distant or absent one. Placing two bars side by side operationalises both: it supplies a similar other for comparison and puts them close on a shared scale, converting private progress into a contest that pulls harder than any solo target.

Why it stays hidden

The mechanism hides behind the friendly framing of a social feature, so the shift from personal goal to competition is never announced. The user feels a new urgency to read and attributes it to their own renewed enthusiasm, not to a comparison that was inserted beside their private measure. Because the solo bar that would free them from the race is quietly replaced rather than offered as a choice, the competitive pull is experienced as self-generated.