Latest iOS 8 user agents:

User Agent Browser Device
[FBAN/MessengerForiOS;FBAV/153.0.0.47.97;FBBV/91923955;FBDV/iPad4,2;FBMD/iPad;FBSN/iPhone OS;FBSV/8.1;FBSS/2;FBCR/MegaFon;FBID/tablet;FBLC/id_ID;FBOP/5;FBRV/0] Facebook Messenger 153 iPad Air
[FBAN/FBIOS;FBAV/26.0.0.11.13;FBBV/7806348;FBDV/iPhone5,2;FBMD/hone;FBSN/iPhone OS;FBSV/8.1;FBSS/2; FBCR/3DK;FBID/phone;FBLC/en_US;FBOP/5] Facebook 26 iPhone 5
[FBAN/FBIOS;FBAV/26.0.0.11.13;FBBV/7806348;FBDV/iPhone5,2;FBMD/hone;FBSN/iPhone OS;FBSV/8.1;FBSS/2; FBCR/3DK;FBID/phone;FBLC/da_DK;FBOP/5] Facebook 26 iPhone 5
RoboForm/337.01 CFNetwork/711.1.16 Darwin/14.0.0 RoboForm Unknown
Podcat/8577 CFNetwork/711.3.18 Darwin/14.0.0 Podcat 8577 Unknown
Mozilla/5.2(iPhone; CPU iPhone OS 8_2 like Mac OS X) AppleWebKit/533.13 (KHTML, like Gecko) CriOS/49.0.2526.70 Mobile/13C71 Safari/533.1.39 Chrome Mobile iOS 49 iPhone
Mozilla/5.0(iPad; U;CPU OS 8_4 like Mac OS X; zh-CN; iPad2,4) AppleWebKit/534.46 (KHTML, like Gecko) UCBrowser/2.0.0.164 U3/0.8.0 Safari/7543.48.3 UC Browser 2 iPad 2
Mozilla/5.0 ;iPhone; CPU iPhone OS 8_1_2 like Mac OS X; AppleWebKit/600.1.4 ;KHTML, like Gecko; Version/8.0 Mobile/12B440 Safari/600.1.4 Mobile Safari 8 iPhone
Mozilla/5.0 ;iPad; CPU OS 8_1_2 like Mac OS X; AppleWebKit/600.1.4 ;KHTML, like Gecko; Version/8.0 Mobile/12B440 Safari/600.1.4 Mobile Safari 8 iPad
Mozilla/5.0 (Macintosh; CPU OS 8_4_1 like Mac OS X) AppleWebKit/600.1.4 (KHTML, like Gecko) Version/8.0 Mobile/12H321 Safari/600.1.4 Mobile Safari 8 Unknown
Mozilla/5.0 (Macintosh; CPU OS 8_3 like Mac OS X) AppleWebKit/600.1.4 (KHTML, like Gecko) Version/8.0 Mobile/12F69 Safari/600.1.4 Mobile Safari 8 Unknown
Mozilla/5.0 (Macintosh; CPU OS 8_3 like Mac OS X) AppleWebKit/600.1.4 (KHTML, like Gecko) CriOS/43.0.2357.61 Mobile/12F69 Safari/600.1.4 Chrome Mobile iOS 43 Unknown
Mozilla/5.0 (Macintosh; CPU OS 8_2 like Mac OS X) AppleWebKit/600.1.4 (KHTML, like Gecko) CriOS/45.0.2454.68 Mobile/12D508 Safari/600.1.4 Chrome Mobile iOS 45 Unknown
Mozilla/5.0 (Macintosh; CPU OS 8_1_1 like Mac OS X) AppleWebKit/600.1.4 (KHTML, like Gecko) Version/8.0 Mobile/12B436 Safari/600.1.4 Mobile Safari 8 Unknown
Mozilla/5.0 (Macintosh; CPU OS 8_0_2 like Mac OS X) AppleWebKit/600.1.4 (KHTML, like Gecko) Version/8.0 Mobile/12A405 Safari/600.1.4 Mobile Safari 8 Unknown
Mozilla/5.0 (iPod; CPU OS 8_0 like Mac OS X) AppleWebKit/600.1.3 (KHTML, like Gecko) Version/8.0 Mobile/12A4345d Safari/600.1.4 Mobile Safari 8 iPod Touch
Mozilla/5.0 (iPod; CPU iPhone OS 8_4_1 like Mac OS X) AppleWebKit/600.1.4 (KHTML, like Gecko) CriOS/44.0.2403.67 Mobile/12H321 Safari/600.1.4 Chrome Mobile iOS 44 iPod Touch
Mozilla/5.0 (iPod; CPU iPhone OS 8_4_1 like Mac OS X) AppleWebKit/537.51.2 (KHTML, like Gecko) CriOS/37.0.2062.60 Mobile/12H321 Safari/9537.53 Chrome Mobile iOS 37 iPod Touch
Mozilla/5.0 (iPod; CPU iPhone OS 8_2 like Mac OS X) AppleWebKit/600.1.4 (KHTML, like Gecko) CriOS/41.0.2272.56 Mobile/12D508 Safari/600.1.4 Chrome Mobile iOS 41 iPod Touch
Mozilla/5.0 (iPod; CPU iPhone OS 8_1_2 like Mac OS X) AppleWebKit/600.1.4 (KHTML, like Gecko) CriOS/40.0.2214.69 Mobile/12B440 Safari/600.1.4 Chrome Mobile iOS 40 iPod Touch