Shopify Buy Button vs Smile App
Head-to-head usage across the sites we track.
Top sites by authority
Shopify Buy Button · Smile App · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
3
2
Open Page Rank 8+
16
6
Open Page Rank 7+
35
19
Open Page Rank 6+
71
40
Open Page Rank 5+
136
100
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Shopify Buy Button · Smile App · share of sites in each country using one or the other
United States
1,455
11,797
United Kingdom
490
3,763
Canada
448
3,449
India
328
2,463
Australia
289
2,463
France
250
1,853
Germany
302
1,613
Spain
193
1,136
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Shopify Buy Button | Smile App |
|---|---|---|
| LCP | 1.8 s | 1.4 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 600 ms | 500 ms |
Median site's p75 values from the Chrome UX Report, Aug 2026. Lower is better; green meets Google's "good" threshold. This describes the sites that use each technology, not the technology's own overhead.