This is a single-arm trial, so all pharmacies will serve as their own control. We will enroll 10 community pharmacies. These 10 pharmacies will continue to provide PEP/PrEP services as normal for several months (control). Then, we will introduce the first phase of the intervention: the minimally viable product (MVP) version of the PEPPI software. The second phase of the intervention will be the enhanced version of the PEPPI software. The pharmacies will continue to provide PEP/PrEP services while using the PEPPI software in place of any paper or electronic processes that they were previously using. The results will then be compared between the control and the intervention periods.

We will enroll 10 community pharmacies. These 10 pharmacies will continue to provide PEP/PrEP services as normal for several months (control). Then, we will introduce the first phase of the intervention: the minimally viable product (MVP) version of the PEPPI software. The second phase of the intervention will use the enhanced version of the PEPPI software. The pharmacies will continue to provide PEP/PrEP services while using the PEPPI software in place of any paper or electronic processes that they were previously using. The results will then be compared between the control and the intervention periods.

Implementation outcomes will focus on how the service (pharmacist-prescribed PEP/PrEP services) is implemented. Name of the Measurement: Implementation - Service Characteristics Measurement Tool: Pharmacy Service Characteristics Questionnaire Unit of Measure: -Number of pharmacists involved in providing birth control services

Implementation outcomes will focus on how the service (pharmacist-prescribed PEP/PrEP services) is implemented. Name of the Measurement: Implementation - Service Characteristics Measurement Tool: Pharmacy Service Characteristics Questionnaire Unit of Measure: -Number of pharmacy staff (non-pharmacists) involved in providing PEP/PrEP services

Implementation outcomes will focus on how the service (pharmacist-prescribed PEP/PrEP services) is implemented. Name of the Measurement: Implementation - Service Characteristics Measurement Tool: Pharmacy Service Characteristics Questionnaire Unit of Measure: -Total amount of money coming in (revenue) from the service via cash pay

Implementation outcomes will focus on how the service (pharmacist-prescribed PEP/PrEP services) is implemented. Name of the Measurement: Implementation - Service Characteristics Measurement Tool: Pharmacy Service Characteristics Questionnaire Unit of Measure: -Total amount of money coming in (revenue) from the service via insurance billing

Implementation outcomes will be measured using Proctor et al.'s (2011) implementation framework. The domains in this framework include appropriateness, acceptability, adoption, feasibility, and fidelity. Survey items will map to each of these domains. Name of the measurement: Implementation - Proctor Implementation Outcomes Measurement tool: Implementation Outcomes Scale Unit of Measure: 5-point Likert-type scale (1= strongly disagree, 2 = disagree, 3 = neither agree nor disagree, 4 = agree, 5 = strongly agree). This same scale is used for all implementation domains (appropriateness, acceptability, adoption, feasibility, and fidelity).

Access to Care outcomes will be assessed using an adapted version of the previously developed scale of Access to Contraceptive Care (Newlon 2021) that assesses patients' access in terms of approachability, acceptability, availability and accommodation, affordability, appropriateness, and privacy. Unite of measure: 5-point Likert-type scale (1= strongly disagree, 2 = disagree, 3 = neither agree nor disagree, 4 = agree, 5 = strongly agree). This same scale is used for all implementation domains (approachability, acceptability, availability and accommodation, affordability, appropriateness, and privacy).