Author
Hojir Rusban Javanmardi
Founder, Parallel Labs
Hojir Rusban Javanmardi is the founder of Parallel Labs Pte. Ltd., the Singapore-incorporated company behind Thrive. He researches men's hormone health, exercise science, and behavior change, and works directly with peer-reviewed literature in endocrinology and sleep science to build the app's habit library. Every article on this site is researched by Hojir and cross-checked against primary sources.
Writes about
- Testosterone optimization
- Men's health
- Exercise science
- Nutrition science
- Endocrinology
- Sleep science
- Behavioral psychology
- Habit formation
Articles by Hojir
Best Testosterone Apps in 2026: 6 Compared Honestly (Prices, Features, Ratings)
An honest comparison of six iPhone apps for supporting testosterone naturally: THRIVE, TestPeak, T-Score, Tmaxx, T-Up and TestoMax. Verified App Store prices, ratings, features and who each app suits. THRIVE is our app, disclosed up front.
THRIVE vs TestPeak (2026): Which Testosterone App Fits You?
A fair head-to-head of THRIVE and TestPeak (Testosterone Boost) using their US App Store listings: approach, features, pricing, ratings and who should pick which. THRIVE is our app, disclosed up front.
THRIVE vs T-Score (2026): Habit System or Daily Scorecard?
A fair head-to-head of THRIVE and T-Score: Boost Testosterone using their US App Store listings: features, pricing, ratings and who should pick which. THRIVE is our app, disclosed up front.
THRIVE vs Tmaxx (2026): Quiz-Based Plan or Daily Habit System?
A fair head-to-head of THRIVE and Tmaxx using their US App Store listings: approach, features, pricing, ratings and who should pick which. THRIVE is our app, disclosed up front.
Testosterone for Busy Dads: A Realistic 20-Minute-a-Day Plan
A time-boxed plan for fathers with little sleep and less spare time. Five levers (sleep, short strength sessions, walking, alcohol, stress) with the effect sizes from the research, plus when to see a doctor.
When to See a Doctor About Low Testosterone: Symptoms, Tests, and Red Flags
Which symptoms justify a testosterone test, which blood tests to ask for (morning total T, free T, SHBG, LH), what the Endocrine Society and AUA guidelines say, and what lifestyle can and cannot do.
Dad Bod and Testosterone: Waist, Visceral Fat, and What the Research Shows
How waist size and visceral fat relate to testosterone in men 35 to 49, why the link runs both ways, what weight-loss studies found, and a practical plan that fits a father's schedule.
Free Testosterone vs Total Testosterone: The Difference
Free vs total testosterone: total counts all testosterone in your blood, free is the small unbound 1 to 4%. See how SHBG and the lab method change results.