It is noteworthy that use of RSSI as a measure of distance has been disputable in the research community. For example, the evaluation results of [17] show that the RSSI for a given link has very small variation over time, and the packet reception rate is at least 85 % when the RSSI is above the sensitivity threshold (about -87 dBm). The work in [18] gives the conclusion that indoor locationing based on signal strength should be feasible if we can construct a sound method for signal propagation in the indoor environment. However, in [19], the experimental results show that even under ideal conditions, the RSSI cannot be used to determine inter-nodal distances in wireless sensor networks. Nevertheless, in our locationbased reminder application, we do not have to determine the exact distance; knowing that the user is in the proximity of the Wi-Fi AP suffices our application.