From first breath to training zones.
VenTracer is designed to stream every breath to your phone or tablet. Watch the test live, get the report when you stop, and leave with zones you can train by the same day.1
In development · Pilot planned 2027 · Not for saleDesigned in India
Five screens that matter.
Watch every breath.
VO₂, VCO₂, RER and ventilation are designed to stream while you test, with markers for workload changes and events.
A report you can train from.
VO₂max or VO₂peak, VT1 and VT2 with heart rate and power or pace at each, your three zones with what each one feels like, and a retest date.
Three zones, your thresholds.
Moderate, heavy and severe: easy, steady and hard, with boundaries set by your own breath, not an age formula.
Change, like for like.
Change you can check: matched protocol, matched equipment, every breath behind every point.
A queue for busy labs and clinics.
Run athletes or clients back to back with same-day reports. A seal check per test is planned.
Concept screens with simulated data.2 Zones come from your ventilatory thresholds.
210 WVT2
312 W
5:05 /kmVT2
4:05 /km
148 bpmVT2
171 bpm
Start to report, step by step.
This is the intended wearer experience, not instructions for the current engineering build.
- About 1 min
Safety check
A second person is with you, you know where STOP is, and the time limit is on screen before the mask goes on.
- About 5 min
Fit and seal check
The analyzer warms up for about 3 minutes in room air first. Put the mask on when the app says so. The app takes the room-air reference; the seal check is planned.
- 2–3 min
Seated rest
Baseline gas exchange before you move. The mask is held by hand for the first 2 minutes; it is strapped only when the rest segment shows no alerts.
- 5–10 min
Warm up
Your own easy exercise while your breathing settles. The analyzer has already warmed up, before the mask went on.
Planned · not in the current build - 8–12 min
Ramp
Power or pace rises steadily until you can’t hold it. Every breath is recorded.
Planned · not in the current build - 3–5 min
Cool-down
Easy pedalling or walking, mask still on.
Planned · not in the current build - When you stop
Report
Take the mask off; the report opens once the analyzer confirms it has stopped. VO₂max, VT1, VT2 and zones, ready to share. A fuel-mix estimate needs its own steady-state test.
The intended flow keeps STOP on screen and ends recording on a detected fault. Software Stop does not physically isolate heater power.
Timings are preliminary and depend on the protocol. The current engineering build records supervised room-air bench sessions only, with the analyzer off-face. Wearer and exercise testing are not enabled. How a VO₂max ramp test works
Every breath, exportable.
Two levels of export are planned. The breath table: every breath with time, volumes (BTPS), fractions, end-tidal values, V̇O₂ and V̇CO₂ (STPD), quality flags (leak, out-of-range, rejected), heart rate and workload. The raw signals: flow, O₂, CO₂, pressure, temperature and humidity at the native sample rate, uncorrected and corrected, so you can rerun every step yourself. Each file is planned to carry its metadata (firmware and algorithm version, flow element, check log, ambient conditions, protocol) as CSV with a JSON sidecar.
Methods for physiologistsOne record per athlete, every test kept.
Athlete and client profiles, protocols, notes and event markers are designed to stay with each test, so comparisons only match like with like.
The full report, on a laptop or tablet.
The same test, laid out for coaches and physiologists: curves, thresholds, zones and the breaths behind them. Concept workspace with example data and fictional names.2
Privacy, in writing.
Processed on the mask.
Planned: breath data processed on the analyzer and sent to the app on your phone.
Export everything.
Raw breath-by-breath data is designed to be exportable to you, your coach or your lab.
Cloud details, before units ship.
Any cloud storage will be described in the privacy notice before units ship. Privacy notice
See it on a real test, first at the pilot sites.
Labs and clinics in the pilot are planned to use the app with engineering units from 2027; dates may change. Athletes on the waitlist hear first when athlete units open.