{"id":42741,"date":"2026-01-20T02:19:00","date_gmt":"2026-01-20T02:19:00","guid":{"rendered":"http:\/\/www.prnasia.com\/story\/archive\/4865848_CN65848_0"},"modified":"2026-01-20T02:19:00","modified_gmt":"2026-01-20T02:19:00","slug":"6letters-launches-mojo-king-an-apple-watch-based-ios-app-for-non-invasive-testosterone-monitoring","status":"publish","type":"post","link":"https:\/\/transmediavictoria.net.au\/?p=42741","title":{"rendered":"6Letters Launches “MOJO KING,” an Apple Watch-Based iOS App for Non-Invasive Testosterone Monitoring"},"content":{"rendered":"

SEOUL, South Korea<\/span>, Jan. 20, 2026 \/PRNewswire\/ — Digital healthcare startup 6Letters<\/b> today announced the official launch of MOJO KING<\/b>, an iOS application that enables non-invasive monitoring of testosterone-related physiological patterns using Apple Watch data.<\/span><\/p>\n

\n

\"6Letters <\/a>
6Letters Launches \u201cMOJO KING,\u201d an Apple Watch\u2013Based iOS App for Non-Invasive Testosterone Monitoring<\/span><\/p>\n<\/p><\/div>\n

MOJO KING leverages heart rate variability (HRV)<\/b>\u2014a standard biometric signal collected by Apple Watch\u2014to analyze changes associated with male hormonal balance. Without requiring blood tests or external sensors, the app allows users to track hormone-related trends seamlessly in everyday life.<\/p>\n

The current version of MOJO KING analyzes individual biometric signals in relation to age-group baselines and 24-hour circadian rhythms<\/b>. Based on this analysis, users are classified into intuitive categories: “Teto Guy<\/span>“<\/b> when values are above the age-adjusted average, or “Egen Guy<\/span>“<\/b> when below. Results are presented in a user-friendly visual format and can be easily shared via social media platforms such as Instagram.<\/p>\n

With a paid subscription, users can remove in-app advertisements and enable automatic, continuous measurements<\/b>, allowing them to observe personalized hormone-related changes over time. This supports a shift from one-time readings to longitudinal, trend-based hormone monitoring<\/b> tailored to individual lifestyles.<\/p>\n

MOJO KING is built on a foundation of multiple patents and peer-reviewed scientific research<\/b>. To further enhance accuracy and personalization, 6Letters is currently training machine-learning models using large-scale medical datasets from the UK Biobank, CDC, Physionet etc<\/b>. Insights derived from this work will power the next generation of the company’s hormone analytics platform.<\/p>\n

Notably, MOJO KING goes beyond conventional smartwatch fitness use cases that focus primarily on heart rate and respiration during aerobic exercise. The app introduces a differentiated approach by analyzing pre- and post-changes associated with moderate-to-high-intensity resistance training<\/b>, offering new insights into hormone-related responses to strength-focused workouts.<\/p>\n

Looking ahead, 6Letters plans to expand MOJO KING with additional modes, including hormone-dependent hair loss management<\/b> and growth-phase optimization<\/b>. The company is also preparing to launch MOJO QUEEN<\/b>, a complementary digital health application focused on female hormone analytics.<\/p>\n

In parallel, 6Letters is currently conducting a pre-seed funding round at an approximate company valuation of USD 5 million<\/span><\/span><\/b>. The company expects to complete AI training based on a huge medical data and plans to apply for FDA 510(k) clearance in the first half of 2026<\/b>, followed by entry into the U.S. Remote Patient Monitoring (RPM) reimbursement market<\/b>.<\/p>\n

MOJO KING is designed to help users understand and manage hormone-related physiological signals in everyday life, said a representative of 6Letters. By combining scientific evidence, large-scale medical data, and wearable technology, 6Letters aims to build a globally scalable digital hormone health platform.<\/p>\n","protected":false},"excerpt":{"rendered":"

SEOUL, South Korea, Jan. 20, 2026 \/PRNewswire\/ — Digital healthcare startup 6Letters today announced the official launch of MOJO KING, an iOS application that enables non-invasive monitoring of testosterone-related physiological patterns using Apple Watch data. 6Letters Launches \u201cMOJO KING,\u201d an Apple Watch\u2013Based iOS App for Non-Invasive Testosterone Monitoring MOJO KING leverages heart rate variability (HRV)\u2014a standard […]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20],"tags":[],"class_list":["post-42741","post","type-post","status-publish","format-standard","hentry","category-business-news"],"yoast_head":"\n6Letters Launches "MOJO KING," an Apple Watch-Based iOS App for Non-Invasive Testosterone Monitoring - My Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/transmediavictoria.net.au\/?p=42741\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"6Letters Launches "MOJO KING," an Apple Watch-Based iOS App for Non-Invasive Testosterone Monitoring - 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