iOS UX psychology

Use these to help people finish jobs they already want. If a pattern only works when the truth is hidden, do not use it.

Framing

The same fact, different label. Lead with the true half that helps (“75% lean” vs “25% fat”). Do not invert a fee into a fake discount.

Descriptive norms

“Most people in this situation do X” when true. Weak percents backfire (“8% donate” tells 92% to skip). Prefer counts of actions if adoption is low.

Curiosity gap

Show a real score plus the worst finding; lock the rest only if paying is the product. Teasers need one true number. Do not fake “14 issues” you did not compute.

Certainty

Lock a number, name a date, state a guarantee. Ranges feel risky. “Cancel anytime” plus a date beats “maybe later.”