Research Article
A Systematic Evaluation of Mobile Applications for Instant Messaging on iOS Devices
Table 1
KLM results: number of interactions required for completing each main task.
| | App | Version | T1 | T2 | T3 | T4 | T5 | Total |
| | Surespot encrypted messenger | 6.00 | 5 | 5 | 3 | 4 | 4 | 21 | | Hike Messenger | 2.5.1 | 5 | 5 | 5 | 5 | 4 | 24 | | HushHushApp | 1.0.3 | 6 | 6 | 4 | 4 | 4 | 24 | | Hiapp Messenger | 1.0.6 | 6 | 6 | 5 | 5 | 4 | 26 | | Kik Messenger | 7.2.1 | 5 | 5 | 5 | 6 | 5 | 26 | | Touch | 3.4.4 | 7 | 5 | 5 | 5 | 4 | 26 | | WhatsApp Messenger | 2.11.8 | 5 | 6 | 5 | 5 | 6 | 27 | | BBM | 2.1.1.64 | 6 | 5 | 7 | 6 | 4 | 28 | | iTorChat | 1.0 | 7 | 6 | 5 | 5 | 5 | 28 | | XMS | 2.31 | 6 | 6 | 6 | 6 | 4 | 28 | | Hangouts | 2.0.2 | 6 | 6 | 5 | 6 | 6 | 29 | | Tango Text, Voice & Video | 3.8.84179 | 6 | 6 | 5 | 6 | 6 | 29 | | Viber | 4.2.1 | 6 | 6 | 5 | 6 | 6 | 29 | | Google+ | 4.6.2 | 8 | 4 | 5 | 8 | 5 | 30 | | LINE | 4.3.2 | 7 | 6 | 6 | 5 | 6 | 30 | | Mxit | 7.2.0 | 7 | 5 | 7 | 6 | 5 | 30 | | Zappzter | 2.1 | 6 | 6 | 7 | 5 | 6 | 30 | | FreePP | 3.2.3.250 | 7 | 6 | 5 | 7 | 6 | 31 | | Telegram Messenger | 2.1 | 6 | 6 | 5 | 8 | 6 | 31 | | IM+ Pro7 | 8.1.1 | 5 | 6 | 8 | 8 | 5 | 32 | | Skype | 4.17.3 | 7 | 6 | 8 | 6 | 5 | 32 | | KakaoTalk Messenger | 4.1.5 | 8 | 6 | 7 | 5 | 7 | 33 | | Snapchat | 7.0.1 | 10 | 4 | 7 | 6 | 6 | 33 | | AppMe Chat Messenger | 2.0.1 | 7 | 7 | 7 | 7 | 6 | 34 | | Tuenti | 4.3 | 5 | 6 | 10 | 7 | 6 | 34 | | GroupMe | 4.4.3 | 7 | 6 | 9 | 7 | 6 | 35 | | Keek | 4.2.0 | 9 | 6 | 9 | 7 | 6 | 37 | | Spotbros | 3.1.4 | 8 | 8 | 10 | 6 | 7 | 39 |
| | Mean | | 6.54 | 5.75 | 6.25 | 5.96 | 5.36 | 29.85 |
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