Equalization & Apnea Trainer

Ever turned back because your ears wouldn't clear? In freediving the first thing that stops you is not your lungs — it is your ears. Miss the equalization timing and you will not get past a few meters. Frenzel Master drills that timing, and the breath hold rhythm behind it, on dry land before you ever get in the water. ■ Equalize on the way down Pressure climbs as you descend. Equalize late and your ears lock up and the descent stops. Practice against a real descent rhythm until the timing is automatic. • CWT (finning) and FIM (pulling the line) • Pressure, buoyancy and oxygen consumption modelled by depth • Every dive logs your equalization count and the depth you stalled at • Step-by-step Frenzel technique guide with anatomy explained • A dive does not end the instant you surface — grab the buoy, get your face up for the first breath, then signal OK ■ The breathe-up, in the real order Breathe-up → limp phase → passive exhale → final inhale → glottis lock. The same sequence and timing used before a real dive. • The final inhale fills belly → ribs → clavicle • The lung gauge stops you at 85–90%, never 100% • Haptic cue on every phase change, so you can follow it with your eyes closed ■ Breath hold tables (CO2 / O2) • CO2 table — shrinking rest intervals build carbon dioxide tolerance • O2 table — growing holds train hypoxic adaptation • Static apnea timing and personal bests • Tables generated from your own current numbers ■ Twenty dive sites that actually exist Dean's Blue Hole, the Dahab Arch, Roatan, Cenote Angelita, Baikal under the ice. Real places people really dive, carrying their real water temperature and clarity. • Every site darkens at its own rate as you go down • Cold water costs more oxygen — your suit's insulation divides that cost • Depth you have logged opens the deeper sites ■ Your progress adds up • Daily training streak and practice reminders • Best depth, longest hold, equalization success rate • Dive logbook and progress charts • Sign in with Google to keep everything across devices ■ Who this is for • Divers whose descent stops because equalizing fails • Beginners preparing before a freediving course • Divers keeping the feel between seasons • Scuba divers who get ear pain on descent ■ Safety — please read This app is a dry-land practice tool. • Never use this app while you are in the water. • Never do breath hold training in water alone. Blackout comes without warning and is fatal when nobody is watching. Always train with a dedicated buddy. • This app does not replace instruction from a qualified freediving instructor and does not provide medical advice. • If you have a respiratory or cardiovascular condition, or you are pregnant, talk to a doctor before starting. Contact: [email protected] Website: https://ilbeol.com/pages/frenzel_master