Stop guessing.Start calibrating

Precision body recomposition coaching from GVNFIT, adjusted every week and delivered through the Vemisis app.

Guhayavarman, founder and head coach of CALIBRATE
Vemisis app home screen showing today's session and daily logs
Vemisis Insights screen with an overall score of 62
45Clients coached
10Countries
48hApplication review time
4hWhatsApp reply time, weekdays

It's not a willpower problem. It's a system problem.

Smart, driven people don't fail at fitness for lack of effort. They fail because nobody built them a system that bends around real life. That's exactly what CALIBRATE does.

  • You've started over more times than you can count
  • Generic plans ignore your schedule
  • You don't know if any of it is working
  • Nobody adjusts the plan when life changes
  • Willpower alone keeps running out
0/5 calibrated
  • A protocol built to survive travel, deadlines and bad weeks
  • Training and nutrition written around your calendar
  • Weekly data review, so you always know where you stand
  • Your coach adapts the plan within 4 hours, every time
  • A system that keeps working when motivation doesn't
The CALIBRATE Method

Five phases. One system.

DMAIC is the improvement framework engineers use to perfect complex processes. CALIBRATE applies it to your body, and Vemisis runs it for you every day.

Week 0

Define

Constraint mapping around your actual work schedule, lifestyle and body. We don't fit you into a programme, we build the programme around you.

In Vemisis

Goal and starting point captured at onboarding

Your calendar, equipment and food habits mapped

Vemisis onboarding screen asking for your main goalVemisis vitals screen with recovery, sleep, HRV and resting heart rateVemisis insights screen showing what is driving your scoreVemisis plan screen in the Improve phase with daily calorie and protein targetsVemisis progress screen showing weight trend and weekly compliance
D

Week 0

Define

Constraint mapping around your actual work schedule, lifestyle and body. We don't fit you into a programme, we build the programme around you.

Vemisis onboarding screen asking for your main goal
M

Every day

Measure

Bodyweight trends, training performance, nutrition compliance, energy and sleep. Measured continuously, so nothing is left to guesswork.

Vemisis vitals screen with recovery, sleep, HRV and resting heart rate
A

Every week

Analyse

Root cause diagnosis when progress stalls. Instead of pushing harder, we identify exactly which variable is blocking results.

Vemisis insights screen showing what is driving your score
I

Week by week

Improve

Protocol adjustments based on your real feedback loop. Nutrition targets, training volume and recovery are tuned every single week.

Vemisis plan screen in the Improve phase with daily calorie and protein targets
C

For life

Control

Self-correcting systems that handle travel, illness and schedule changes without derailing months of progress.

Vemisis progress screen showing weight trend and weekly compliance
Vemisis app iconMeet Vemisis, the CALIBRATE app

Your coach. Your plan. One app.

Vemisis is the training app built for CALIBRATE clients. Sessions, macros, recovery and your coach live in one place, so every day is already decided before you wake up.

WorkoutsMacro targetsRecovery scoreCoach chatA.L.F.R.E.D AIFasting timerApple HealthHealth Connect
Vemisis training screen with today's session
Vemisis home screen
Vemisis nutrition screen with calorie ring

Your coach, one tap away

Message your coach inside the app, share wins and struggles, and get your weekly check-in reviewed where your data already lives.

Vemisis coach messages screen

An AI assistant trained on your coach's playbook

Ask about nutrition, training, supplements or recovery and get answers grounded in the CALIBRATE method, not random internet advice.

Vemisis A.L.F.R.E.D AI assistant screen

Syncs with what you already wear

Apple Health, Apple Watch and Oura on iPhone, Health Connect on Android. Steps, sleep, HRV and workouts flow in automatically.

Vemisis connections screen for Apple Health and wearables
See everything inside Vemisis

No generic plans. Ever.

Your programme is written for the outcome you're chasing, then rewritten every week as your body responds.

Coach running outdoors at sunrise

Fat Loss

Drop body fat while holding onto every bit of muscle, without the crash-diet spiral.

  • Custom calorie and macro targets
  • Strength-preserving training split
  • Weekly check-in adjustments
Start with fat loss
Coach training on the bench press

Muscle Gain

A structured hypertrophy programme with progressive overload tracked every session.

  • Progressive overload tracking
  • Surplus calibrated to your metabolism
  • Video form checks on request
Start with muscle gain
Coach performing a heavy deadlift

Recomposition

Lose fat and build muscle at the same time. The hardest goal to programme, and the one CALIBRATE was built for.

  • Nutrient timing around training
  • Bi-weekly composition scans
  • Slowest, most rewarding path
Start with recomposition
Explore every goal we coach, including Longevity and GLP-1 Support

How progress is measured.

No before-and-after promises. Every week your coach reviews the same numbers you see in Vemisis, and the plan changes when they do.

  1. 01

    Body

    Bodyweight trend, waist and body measurements, and body composition.

    Weekly
  2. 02

    Strength

    Sets, reps and load logged for every session, with your strength records tracked over time.

    Every session
  3. 03

    Recovery

    HRV, resting heart rate and sleep, synced from Apple Health, Apple Watch, Oura or Health Connect.

    Daily
  4. 04

    Check-in

    Training, nutrition, energy, sleep and compliance, reviewed by your coach before the plan is adjusted.

    Weekly
See how the weekly review works
Vemisis progress screen showing bodyweight and measurement trends
Vemisis insights screen with the weekly score
Investment

One protocol. Zero guesswork.

Every plan includes the full CALIBRATE system, your Vemisis app access, weekly analysis and direct coach access.

1:1 coaching, billed monthly

Monthly

₹25,000

per month · minimum 3-month commitment

Book your free call or apply for Monthly directly
  • Calibration Assessment Report
  • Custom training programme
  • Personalised nutrition protocol
  • Weekly check-in & adjustments
  • WhatsApp coach support

Our progress commitment

Follow the protocol for 30 days. If you don't see measurable progress in your check-in data, we rebuild your plan from scratch, free, until you do. Fees and cancellations follow our refund policy.

  • No fine print
  • No hidden fees
  • 3-month minimum, then month to month

Full plan breakdown and FAQ on the pricing page.

Guhayavarman, founder and head coach of CALIBRATE, in a black t-shirt with arms crossed
Guhayavarman Fitness

Chennai, Tamil Nadu

Why I built CALIBRATE.

I started CALIBRATE because I kept seeing the same pattern: smart, motivated people failing to reach their goals, not from lack of effort, but from lack of the right system. Engineers, founders and product managers putting in the work and getting nowhere.

The fitness industry profits from confusion. CALIBRATE is built on the opposite principle: the same data-driven frameworks used in precision engineering, applied to your body.

Guhayavarman · Founder & Head Coach, GVNFIT

  • Level 4 Personal Training Certification
  • Sports Nutrition Specialist
  • DMAIC-certified performance protocol
  • Competitive athlete background
45

Clients coached

10

Countries reached

5+

Years coaching

Meet the full coaching team

Questions, answered.

Coach Guhayavarman

Still have questions?

Can't find what you're looking for? Message us and you'll hear back from a real coach.

Message us

Engineers, product managers, consultants and founders who work 10+ hour days and have failed at generic fitness programmes before. The system is built around data, not motivation.

CALIBRATE is the coaching methodology from GVNFIT (Guhayavarman Fitness): the DMAIC protocol, your coach and the weekly analysis. Vemisis is the app that delivers it, holding your sessions, nutrition, recovery data and coach chat in one place.

Real body recomposition takes time. The first month establishes baselines. Months two and three are where the compounding effect of weekly adjustments produces visible, measurable results.

Your coach is reachable via WhatsApp on weekdays with a maximum 4-hour response window, covering questions, adjustments and anything between weekly check-ins. You can also message your coach inside Vemisis.

Applications are open to everyone and each one is personally reviewed, usually within 48 hours. Onboarding is paced so coaching quality stays high.

No. Programmes are built for a gym, home gym, hotel gym or bodyweight setup. Your training is written around what you have access to.

Completely free, and not a sales call. We review your situation and tell you honestly whether the programme fits your goals and timeline.

Your body is a process. Let's calibrate it.

Tell us where you are and where you want to be. In a free 30-minute call we'll show you exactly how CALIBRATE and the Vemisis app would work around your schedule. No pressure, no commitment.

Coach Guhayavarman checking the Vemisis app on his phone