Choose pill crushers when the question fits its direct job: it mechanically reduce an approved solid oral dosage form into smaller particles for an authorized administration plan; baby breathing monitors instead use contact or contactless sensors to estimate movement or respiratory patterns and issue alerts.
The comparison is governed by different mechanisms. For pill crushers, examine dosage form and modified release; for baby breathing monitors, examine intended use and signal artifact. Only then do added features help, because the practical objective is established.