Digital Geiger Counter is the best "fake geiger counter" prank on the iTunes App Store. Tilt and touch to boost the "radiation levels" and fool your friends. Now with integrated Facebook & Twitter sharing!"Awesome! *****""Good App...Nice to fool people with!""Can't wait to try this in different parts of the world to "prove" that some places have more natural radiation than an exploded power plant!""It's great! My friend thought it was totally real.""...had a lot of fun with it...convince your 16-year old son that he must have stood in something radioactive because his sneakers make the count rate zoom up" - EE Times review"Rad u *****Now I can prove to everyone that they are indeed radioactive. And i can refuse to give rides to deadbeats at work if the geiger counter detects radiation on their shoes.""***** Eccellente""Valutazione ****Semplice ed ottimo strumento di rilevazione Buono"FEATURES easy-to-read LCD display measures hazards from background to extreme levels oversized numeric meter easily switchable from microsieverts to millirem or count per minute scales digitally accurate from 0.10 Sv/h to 100 Sv/h (0.01 mrem/h to 10 mrem/h) authentic audio click rate, easily mutable for library or classroom use optional audio synchronized camera flash (iPhone 4, iPhone 4S, iPhone 5, iPhone 5c, iPhone 5s only) adds to the tension versatile alpha, beta, and gamma modes crisp Retina graphics for Retina iPhone and iPod touch dual tilt-sensitive and touch-sensitive controls easy-to-grip back helps keep Digital Geiger Counter in your hand not on the floor convenient pocket size lets you take Digital Geiger Counter everywhereWARNINGDigital Geiger Counter is meant for entertainment purposes only and is entirely ineffective at detecting actual ionizing radiation. Digital Geiger Counter is factory-calibrated to the x-axis and contains no user-serviceable partsINSTRUCTIONS1. Hold Digital Geiger Counter flat and face up.2. Smoothly tilt Digital Geiger Counter's face to the left or right on the x-axis to increase levels.3. Surreptitiously touch and hold the yellowish radiation symbol on the bottom left of the screen with your thumb to boost levels if necessary. The outside circle edge gives minimal boost, slowly increasing to maximum boost in the bottom left hand corner of the screen.4. For best results with Digital Geiger Counter, practice subtly combining both tilt and touch control methods. Also try twisting Digital Geiger Counter as you move it towards your target. Be slow and smooth.