Pixel 9 Pro Fold (Inner) — 373.8 PPI

The phone panel measures 373.8 PPI from its2,076 × 2,152 resolution across a 8″ diagonal.At a typical phone viewing distance of 10–14 inches (25–35 cm), individual pixels become indistinguishable beyond roughly 9.2″ / 23.4 cm — the 20/20 visual-acuity limit for this density. At 373.8 PPI, the panel is comfortably in Retina-class territory for its use case.

At 374 PPI, this exceeds the ~300 PPI threshold where individual pixels become imperceptible at hand-held distance. This is Retina-class density — sharp enough that increasing PPI further yields diminishing visible returns.

Across the 71 phones in this database, the average pixel density is447.1 PPI. The Pixel 9 Pro Fold (Inner) sits at 373.8 PPI —73.3 PPI below the category average, sharper than 3% of its peers.

For context outside the phone class: 373.8 PPI is about 1.7× the density of the 27" 5K Monitor reference display (217.6 PPI).