Pillow Pair is an Android app that provides educational pillow-fit estimates and named product matches based on a questionnaire and optional on-device photos.

The estimates are not clinically validated and do not diagnose conditions, prescribe treatment, or guarantee relief. The app is free, with optional support. Its product page describes the inputs, matching approach, and limits.

Google Play: https://play.google.com/store/apps/details?id=com.pillowpair.app