A One-Page Text Entry Method Optimized for Rectangle Smartwatches

Rhongho Jang, Changhun Jung, David Mohaisen, Kyunghee Lee, Daehun Nyang

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


In this paper, we provide the design and implementation of UOIT, a text entry method optimized for smartwatches. UOIT uses only one page where a user can see and tap directly for entry without any additional actions, such as zoom-in/zoom-out and swipes, which are required in the existing entry methods. To fully utilize the constrained screen space and to address the "fat finger" problem, we use a technique called "drawing-like typing", which reduces the 26 small alphabetic keys into 13 large keys with a dual input property. To evaluate the performance of UOIT, we conducted two user studies while varying the learning period. In the short-term experiments (i.e., two days), we observed a fast learning curve of users when using the UIOT keyboard. Moreover, with the long-term experiments (i.e., a month), we show that users can type as fast as QWERTY keyboard but with much less errors. Moreover, UOIT outperforms the state-of-the-art keyboard in both speed and error rate.

Original languageEnglish
JournalIEEE Transactions on Mobile Computing
StateAccepted/In press - 2021

Bibliographical note

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  • Dictionaries
  • Error analysis
  • Keyboards
  • Mobile computing
  • Mobile handsets
  • Performance evaluation
  • Software keyboard
  • Usability
  • rectangle screen
  • smartwatch


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