Wireless sensors are more favorable in measuring structural response compared to conventional sensors. This is because they are easier to use with no issues with cables and are considerably cheaper. There are several applications that can be used in recording and analyzing data from MEMS sensor installed on an iPhone. The Vibration App is one of the applications used and there has not been adequate research conducted in analyzing the performance of this App. This paper analyzed the performance of the Vibration App by comparing it with the performance of an ICP sensor. Results show that natural frequency results are more accurate (error less than 5%) in comparison to the amplitude results. This means that built- in MEMS sensor in smartphones are good at estimating natural frequency of structures. In addition, it was seen that the results became more accurate at higher frequencies (5.0Hz and 10.0Hz).

Abstract
 1. Introduction
 2. Vibration application
  2.1 Time series view
  2.2 Frequency view
  2.3 Data acquisition settings
 3. Performance examination usingshaking-table tests
  3.1 Specimen used
  3.2 Experimental setup
 4. Shaking-table test results
  4.1 0.5Hz input frequency
  4.2 1.0Hz input frequency
  4.3 5.0Hz input frequency
  4.4 10.0Hz input frequency
 5. Analysis of shaking-table testresults
  5.1 Analysis of error rate in amplitude data
  5.2 Analysis of error rate in frequency data
 6. Conclusion
 References

• 마푼과나 시부시시웨(서울과학기술대학교 건축과) | Mapungwana, S. T. (Dept. of Architecture, Seoul National University of Science and Technology)
• 정영석(㈜아이스트) | Jung Young-Seok (I'ST Co., Ltd.)
• 이종호(서울과학기술대학교 건축과) | Lee Jong-Ho (Dept. of Architecture, Seoul National University of Science and Technology)
• 윤성원(서울과학기술대학교 건축학부) | Yoon Sung-Won (School of Architecture, Seoul National University of Science and Technology) 교신저자