Is the Geiger Counter App for Smartphone accurate?

The Geiger Counter app for smartphones can provide a basic indication of radiation levels, but its accuracy is generally limited compared to dedicated Geiger counters. Most smartphone apps use the phone's built-in sensors or rely on external devices, which may not be calibrated for precise measurements. For critical applications, it's advisable to use professional-grade equipment. Always verify with reliable sources or devices for accurate radiation monitoring.