Latest Apple iPod Touch 4 user agents:

User Agent	Browser	Platform
Mozilla/5.0 (iPod; U; CPU iPhone OS 4_3 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Mobile/8F190 iPod4,1 BingWeb/4.0.1.1552.20130607	Microsoft Bing 4	iOS 4iPod Touch 4
Mozilla/5.0 (iPod; CPU iPhone OS 6_1_6 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Mobile/10B500 iPod4,1 BingWeb/4.0.3.1154.20130807	Microsoft Bing 4	iOS 6iPod Touch 4
Mozilla/5.0 (iPod; CPU iPhone OS 6_1_3 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Mobile/10B329 iPod4,1 BingWeb/4.2.1710.20131023	Microsoft Bing 4	iOS 6iPod Touch 4
Mozilla/5.0 (iPod; CPU iPhone OS 6_1_2 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Mobile/10B146 iPod4,1 BingWeb/4.4.1.1605.20140312	Microsoft Bing 4	iOS 6iPod Touch 4
Mozilla/5.0 (iPod4,1; iPhone; U; CPU OS 6_1_5 like Mac OS X; en_US) com.google.GooglePlus/48043 (KHTML, like Gecko) Mobile/N81AP AppleWebKit/537.51.2 (gzip)	Google Plus	iOS 6iPod Touch 4
Instagram 6.1.4 (iPod4,1; iPhone OS 6_1_6; en_US; en) AppleWebKit/420+	Instagram 6	iOS 6iPod Touch 4