digital network is strategically designed to maximize total profitability. Our digital sales have grown at a CAGR of more than 35% between fiscal year 2015 and fiscal year 2020, and represented 26% of our total sales in fiscal year 2020, up from 8% in fiscal year 2015.
Mobile App. In 2018, we introduced a custom-designed mobile app that allows consumers to create a personalized pool profile, sync in-store prescriptions, and monitor the performance of at-home water tests. As of April 2021, the mobile app had more than half a million downloads and an average user rating of 4.6/5.0. We plan to continue enhancing this critical element of our network by introducing new features, including transaction capabilities.
Consumer-Centric Integrated Ecosystem. We architected a consumer-centric integrated ecosystem comprised of our physical network of 952 branded locations and a robust, data-driven digital platform. Over the last two years, we have invested in new capabilities, including global inventory visibility, buy online pick-up in store (“BOPIS”), buy online return in store (“BORIS”), and ship from store (“SFS”), all of which were introduced in 2021. With our integrated physical and digital network, we will have the unique advantage of being able to reach all consumers in the continental United States in less than 24 hours, whether they are homeowners, pool and spa professionals, or commercial pool operators, whenever, wherever, and however they prefer to shop.
AccuBlue® Water Testing & Prescription Service. In January 2020, we launched our AccuBlue® in-store water testing device and enhanced water testing experience. AccuBlue®, which features exclusive and proprietary software that incorporates our 57 years of accumulated water treatment expertise, automates and gamifies the water testing experience, driving enhanced accuracy, higher throughput, greater consumer engagement, and increased consumer adherence to prescription recommendations. Locations that have been equipped with AccuBlue® are growing sales at a faster rate than our other locations, supported by an increase in number of water tests performed, an improved conversion rate, and an increase in number of products prescribed per test which has resulted in greater units per transaction. In December 2020, we completed the rollout of AccuBlue® across our physical network.
Highly Experienced and Visionary Management Team. Over the last five years, we have built a diverse, multi-disciplinary management team to drive our consumer-first, digitally enabled growth. Since 2018, three of our seven senior leaders have joined our organization, bringing new expertise and capabilities that are highly complementary and synergistic with our core industry expertise that we have accumulated over decades.
Innovating the Future of Pool and Spa Care
As we look forward, we are committed to better serving our digital-first consumer by introducing an expanded portfolio of connected pool and spa products and services. We believe that we are uniquely positioned to leverage our market-leadership to continue to disrupt the pool and spa care category and further distance ourselves from our competition.
AccuBlue HomeTM Subscription. We are actively developing new technologies that seek to fundamentally change the way all consumers, whether a novice or an expert, care for their pools and spas. Through a new AccuBlue HomeTM subscription offering, we leverage our proprietary water diagnostics software to convert on-demand test results into actionable prescriptions and treatment plans tailored to the specific size and conditions of a consumer’s pool or spa, which we can seamlessly and automatically fulfill through our integrated network. We launched the pilot of our AccuBlue Home program in June 2021.
Certified Pool Maintenance Offering. We are assembling a strategic network of qualified pool professionals to extend the Leslie’s brand into on-site water maintenance, completing our suite of service offerings in the residential pool ecosystem.
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