Men's fertility platform
Your fertility.
Tracked like a mission.
Most fertility apps weren't built for you. Kalcius is. Track your numbers, manage heat exposure, stay ahead of her cycle, and level up as a partner — all in one place.
01 / HARDWARE
The Kalcius Clip
A belt- or waistband-mounted BLE thermometer that logs heat exposure all day. Hot tubs, laptops, long drives — see exactly when you're cooking your odds, and fix it.
02 / INTEL
Know your numbers
Log semen analyses, hormone panels and vitals. Import from Apple Health. Watch trends, not one-off results — and know when a number is worth a conversation with your doctor.
03 / PARTNER OPS
Code Red. Code Orange.
Track her cycle, get advance warning on high-fertility windows and rough weeks, and log what worked last time — so you show up better every month.
04 / MISSION
Goals, streaks, badges
Set fertility and relationship goals, keep streaks alive, and earn badges. Improvement you can measure — with food, supplement and training suggestions to match.
Kalcius Clip — coming soon
Continuous heat-exposure logging. Two-week battery. USB-C. Syncs to your phone over Bluetooth. Clip it to your belt or waistband and forget it's there.