Taking the most popular evaluation systems and standards for APPs all around the world as references, an evaluation index system for road navigation APPs is proposed.Quantitative measurements of functions, degrees of user experience, and self-evaluation by developers are set as indices.APPs are evaluated from both subjective and objective aspects.Four quantitative measurements along with correspondence algorithms are constructed, which are the accuracy of estimated travel time, coverage rate of information, accuracy of localization, and grading accuracy of traffic information.Six indicators are considered to assess the degrees of user experience for navigation APPs, including operational convenience, accuracy, fluency, and timeliness of information, stability, and satisfaction.Self-evaluation by developers mainly focuses on the quality of data source, transmission mode of information, and software features.The evaluation results for APPs are finally determined based on the most unfavorable rating in the multi-level evaluation.A case study is carried out by assessing three most popular APPs for road navigation in China.The results of four indicators for APP (A) are 76.42%, 76.24%, 100% and 76.53%, respectively.The score of user experience is 4.54, which indicates that APP (A) rating in the first level.The results are consistent with the market share of it as well as the results from market investigation, which verifies the usability and dependability of this proposed evaluation system.
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