SmartphonesComputingEveryday

Glossary

PPI

Also: pixels per inch, pixel density

PPI means pixels per inch, a rough measure of how sharp a screen looks up close.

Go deeper

Go deeper

PPI means pixels per inch, a rough measure of how sharp a screen looks up close. In everyday buying decisions, the useful question is not just what the spec says, but what it changes for comfort, cost, speed, safety, or battery life.

LCDOLEDResolution

Appears in these stories

Why your phone gets hot when you charge and use it at the same timeApple just changed how repairs work: here's who that actually affects

Still fuzzy? Ask MAMBO

Send us the bit that still feels unclear and we may turn it into a sharper explanation.

Ask a questionMarkdown version

Updated Jun 26, 2026