This paper presents a study of free space path loss of WIFI network using Cell Info Lite App and WIFI analyzer tool. This paper focuses on experimental tests by using WIFI router, mobile phones to measure and analyze the loss of signal strength over distance from 0 meter to 9 meter. The result of Free Space Path Loss (FSPL) for frequency 2457 MHz shows that the longer the distance, the worse the signal get. In addition, the experiment test indoor and outdoor was done analyse. The results of the comparison conclude that the signal strength becomes weak can affect by distance and obstacles such as door, wall. Signal strength also can say from colors which is when the measurement result shows green color is strong signal while orange color is weak signal and red color is bad signal. When the signal strength become weak Wi-Fi analyzer was displayed green zone to red zone. The paper purpose showed that where the area have a stronger/weaker connection in a house environment.