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Jack Dorsey Launches Sun Day, Elevating UV Tracking and Vitamin D Management

Introduction

Jack Dorsey, renowned for co-founding Twitter, is once again reshaping the digital landscape with his latest venture. Following the recent release of Bitchat—a Bluetooth-based messaging application—Dorsey has introduced Sun Day, an innovative tool designed to monitor UV exposure and track vitamin D intake.

Harnessing Technology For Health

Sun Day exemplifies the seamless integration of technology and daily wellness. Available exclusively on iOS via TestFlight, the app provides users with real-time UV index data based on their geographic location. In addition to critical weather parameters such as cloud cover, sunrise, and sunset timings, Sun Day enables users to select their skin type from six distinct categories. This personalized approach ensures that the app calculates the precise duration of safe sun exposure before the risk of skin burn becomes a concern.

Open-Source Innovation

Dorsey’s commitment to transparency and developer collaboration is evident in the open-source nature of Sun Day. Its code is accessible on GitHub, inviting developers to clone and contribute to its continuous evolution. Notably, Dorsey leveraged Goose, an open-source coding tool, as opposed to more widely-recognized options like Cursor, Claude Code, or Windsurf.

Enhanced Features for Daily Wellness

In addition to UV tracking, Sun Day calculates and displays the minimum vitamin D intake required for optimal health. Users initiate a session via the ‘Track UV Exposure’ button, and upon completion, the app quantifies both the vitamin D generated during the session and the cumulative effect over the day. This holistic approach to sun exposure management is expected to appeal to health-conscious individuals and professionals seeking a balance between safety and sunlight benefits.

Conclusion

With Sun Day, Jack Dorsey extends his pioneering influence in the tech industry to improve personal health management. By fusing robust technological capabilities with actionable health insights, Sun Day offers a compelling model for future innovations across digital wellness applications.

FinTech’s Dominance In MENA: Three Strategic Drivers Behind Unyielding VC Success

Despite facing tightening global liquidity and macroeconomic headwinds, the FinTech sector continues to assert its leadership in the MENA region. In the first half of 2025, FinTech emerged as the most resilient and appealing arena for venture capital investments, proving its worth as a catalyst for financial innovation and inclusion.

Addressing Structural Financial Gaps

In many parts of MENA, a significant proportion of the population remains underbanked and underserved by traditional financial institutions. FinTech companies are uniquely positioned to address these persistent challenges by bridging critical access gaps and driving financial inclusion. With the proliferation of payment apps, digital wallets, and micro-lending platforms, investors have witnessed firsthand how these solutions pave the way for scalable growth and eventual exits. Early-stage momentum in the region is underscored by a doubling of pre-seed deals year-over-year, reinforcing the sector’s capacity for rapid innovation and sustainable expansion.

Highly Scalable and Replicable Business Models

One of the key factors behind FinTech’s dominance is the inherent scalability of its business models. Once the necessary infrastructure and regulatory approvals are in place, these models have demonstrated robust performance across borders. The first half of 2025 saw a marked acceleration in deal activity, with payment solutions leading the charge with 28 deals in MENA—a significant increase over the previous year. Lending platforms, in particular, experienced a meteoric 500% year-over-year increase in funding, emerging as the fastest-growing subindustry. Such replicability makes FinTech an attractive proposition for investors seeking high-growth opportunities in diverse markets.

Supportive Regulatory And Government Backing

The strategic support offered by key government initiatives in the UAE and Saudi Arabia has been instrumental in propelling the FinTech sector forward. Progressive frameworks, such as the UAE’s open finance and digital asset directives, coupled with Saudi Arabia’s live-testing sandboxes, have materially lowered entry barriers for startups. These measures not only foster innovation but also streamline the path to commercialization. Consequently, the combined efforts of these regulatory bodies have enabled the UAE and Saudi Arabia to account for 86% of MENA’s total FinTech funding in H1 2025.

The resilience of FinTech in MENA is not merely a reflection of contemporary market trends—it signals a fundamental shift in the region’s economic fabric. With an unwavering commitment to addressing real financial challenges, scalable and replicable business practices, and robust regulatory support, FinTech is setting the benchmark for sustainable innovation. As capital markets become increasingly discerning, this sector stands out as a beacon of long-term growth and transformative impact.

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