Latest iOS 11 user agents:

User Agent Browser Device
Mozilla/5.0 (iPhone; CPU iPhone OS 11_0 like Mac OS X) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.7507.1243 Mobile Safari/537.36 Chrome Mobile 49 iPhone
Mozilla/5.0 (iPhone; CPU iPhone OS 11_0 like Mac OS X) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/48.0.2548.1067 Mobile Safari/537.36 Chrome Mobile 48 iPhone
Mozilla/5.0 (iPhone; CPU iPhone OS 11_0 like Mac OS X) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2193.1671 Mobile Safari/537.36 Chrome Mobile 41 iPhone
Mozilla/5.0 (iPhone; CPU iPhone OS 11_0 like Mac OS X) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.3823.1977 Mobile Safari/537.36 Chrome Mobile 39 iPhone
Zalo/238.1 CFNetwork/897.15 Darwin/17.5.0 Zalo 238 Unknown
Zalo/205.0 CFNetwork/889.9 Darwin/17.2.0 Zalo 205 Unknown
Zalo/195.1 CFNetwork/897.15 Darwin/17.5.0 Zalo 195 Unknown
Zalo/195.1 CFNetwork/893.14.2 Darwin/17.3.0 Zalo 195 Unknown
Zalo/156.1 CFNetwork/894 Darwin/17.4.0 Zalo 156 Unknown
Winamp/8.0.0 CFNetwork/897.15 Darwin/17.5.0 Unknown Unknown
Winamp/49.0 CFNetwork/889.9 Darwin/17.2.0 Unknown Unknown
Winamp/47.0.0 CFNetwork/889.9 Darwin/17.2.0 Unknown Unknown
Winamp/37.1 CFNetwork/887 Darwin/17.0.0 Unknown Unknown
whisper/201807171247 CFNetwork/901.1 Darwin/17.6.0 Whisper Unknown
WhatsApp/2.18.71.6 CFNetwork/902.2 Darwin/17.7.0 WhatsApp 2 Unknown
WhatsApp/2.18.60.15 CFNetwork/897.15 Darwin/17.5.0 WhatsApp 2 Unknown
WhatsApp/2.18.31.32 CFNetwork/894 Darwin/17.4.0 WhatsApp 2 Unknown
Viber/9.0.2.3 CFNetwork/897.15 Darwin/17.5.0 Viber 9 Unknown
Viber/8.8.0.155 CFNetwork/897.15 Darwin/17.5.0 Viber 8 Unknown
Viber/8.7.2.190 CFNetwork/897.15 Darwin/17.5.0 Viber 8 Unknown