This study was anchored on the Queuing Theory, which examines how lines develop, function, and malfunction. One solution to long lines is to use an online appointment system, which functions as a scheduler and eliminates, reduces queues. This study assessed the client’s satisfaction on the online appointment system implemented in Philippine Statistics Authority Aklan. This study was conducted using descriptive research and test of association, which entails conducting a survey using a questionnaire-checklist. Chi-square, means, frequency, and percentage distribution, were the statistical methods employed. The level of significance was established at 0.05. The following summary of findings were obtained: Majority of the respondents were female, aged 21 to 29 years old. In terms of civil status, more than 90% were single or married/living together. Respondents that are bachelor graduates outnumber all other and unemployed respondents. Furthermore, the online appointment system received a satisfaction score of 91.24 based on the experience of the clients using the system. The appointment system's usability or user-friendly experience received the highest satisfaction score (95.7%), while the lowest score (87.37%) was given to the privacy and security feature, which still interpreted as "very satisfied". This indicates that the appointment system is functional and effective in terms of client service, but must continue to improve its privacy and security features to retain high client satisfaction. On the other hand, client's unfamiliarity with the appointment system appears to be the biggest barrier to its use, thus, conduct of information campaign may help address it.