Default Wifi devices detector

Hello, I would like to know if there is any app that could automatically detects new devices connected to my wifi. Thanks.

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Brand: SONY
ROM: LT22i_XPERIA_Z1_6.2.A.1.100
Status: Rooted - CWM 6

History: Panasonic yellow screen (Dead) --> Siemens (dead) --> Motorolla L6 (sold) --> Motorolla L7 black (sold) --> Nokia 6600 (stole) --> Nokia 6600 (sold) --> Nokia N70 (Stole) --> Nokia N73 (Stole) --> Nokia 5230 (gave to someone) --> Sony Xperia P (in hand)

Battery Consuming Culprits