Smile App vs Vitals

Head-to-head usage across the sites we track.

Top sites by authority

Smile App · Vitals · how many of each technology's sites sit in the web's highest authority tiers

Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.

By country

Smile App · Vitals · share of sites in each country using one or the other

United States 13,022

3,566

United Kingdom 4,121

1,463

Canada 3,860

1,060

India 2,789

1,304

Australia 2,726

984

France 2,056

979

Germany 1,706

990

Spain 1,201

663

Audience countries from the Chrome UX Report, top markets of either technology.

Real user performance

Median site's p75 values from the Chrome UX Report, Jun 2026. Lower is better; green meets Google's "good" threshold. This describes the sites that use each technology, not the technology's own overhead.

Sites that switched

Domains that dropped one technology and adopted the other within about a year, data nobody else gives away free.

All Smile App sites · All Vitals sites