Back In Stock vs Smile App

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

Top sites by authority

Back In Stock · Smile App · 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

Back In Stock · Smile App · share of sites in each country using one or the other

United States 1,474

13,022

United Kingdom 829

4,121

Canada 749

3,860

India 684

2,789

Australia 597

2,726

France 588

2,056

Germany 560

1,706

Indonesia 1,317

725

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 Back In Stock sites · All Smile App sites