The purpose of this study is to examine the feasibility of using sipIT tools (i.e., wrist-worn sensors, smart water bottles, mobile applications) to increase compliance with physician-recommended fluid consumption guidelines in participants with a history of urolithiasis. The study aims to: 1) deliver notifications regarding fluid consumption to the FitBit Versa and the participant's smartphone based on the participant's assessed fluid intake, and 2) determine the acceptability of using the sipIT tools to increase fluid consumption. It is hypothesized that receiving notifications regarding fluid consumption will lead to an increased compliance in attaining fluid consumption guidelines. Further, it is hypothesized that the frequency of notifications will diminish across the study duration.

Complying with fluid consumption guidelines provides a variety of health benefits. Patients with a history of urolithiasis are a segment of the population that can benefit from meeting physician-recommended fluid consumption guidelines. Preliminary studies with this population have revealed patient interest in using various technologies (i.e., wrist-worn sensors, smart water bottles, mobile applications) to increase their fluid consumption but the investigators are not aware of any that combine multiple technologies. The investigators' long-term goal is to examine if just-in-time reminder notifications to drink following periods when patients have not been drinking will increase compliance among patients with a history of urolithiasis. To prepare for that study, the investigators seek to evaluate the feasibility and acceptability of the sipIT tools in this study.

This study is part three of a set of studies aimed at determining the feasibility of using technology to increase compliance with fluid consumption guidelines. Preliminary data included 1) a focus group of participants with a history of urolithiasis and 2) a lab study to examine the feasibility of using wrist-worn sensors to detect non-alcoholic drinking events. Data from the focus group revealed that participants are interested in using a variety of technologies (e.g., wrist-worn sensors, smart water bottles, mobile applications) to assist with increasing fluid consumption. Data from the lab study revealed that using wrist-worn inertial sensors to detect drinking events is feasible. Based on data from the lab study, an algorithm was developed to detect these drinking events and has been implemented in a consumer smartwatch consumer smartwatch app for just-in-time drinking detection.

Inclusion Criteria:

• Fluent in spoken and written English, and capable of providing informed consent
• Own an iPhone (version 6 or higher)
• History of urolithiasis
• Willingness to complete all study procedures: completing questionnaires, participating in semi-structured interviews, tracking fluid consumption, wearing a FitBit Versa and receiving notifications on the FitBit and their smartphone for a three-month period

Exclusion Criteria:

• Any medical condition that interferes with regular fluid consumption

There is no plan to share the individual participant data with other researchers.

3 months