Your AI coach, in any language

Meet Cal.
She's already
read your plate.

Snap it, say it or scan it. Cal does the counting, plans your week, and calls in eight specialist coaches the moment you need one.

Become a Founding Member

Cal plus 8 specialists.
60 languages. One team, talking about you.

Cal · Head coach

Hi, I'm Cal. Head coach at Gravitas8.

Lunch loggedChicken & rice bowl · 620 kcal

Kai moved leg dayCal shifted your bigger lunch

Replying in Español60 languages, 36 spoken

Tap Cal

Scroll, I'll show you round

Logging

Food diaries used to be homework.
Now it's a photo.

Pick a way to log and watch what Cal does with it. No searching through forty versions of "chicken breast".

Go on, pick one. I'm quick.

Today

620of 2,100 kcal

Protein

Carbs

Fat

Chicken · 180 g Rice · 150 g Greens

Chicken & rice bowl

Photo · 12:55

620

Live

Now try it with
your own plate.

Upload a photo of any meal. Cal splits it into each food, estimates the portions and tells you what she thinks.

Choose a photo or try one of ours

Three free photos. Estimates from a photo, so check the portions.

Cal is looking…

Example estimateChicken, rice and greens bowl

620kcal

Protein51 g

Carbs48 g

Fat21 g

Grilled chicken breast 140 g230
Basmati rice 150 g195
Avocado 70 g112
Olive oil 5 gassumed45
Broccoli 80 g27
Cherry tomatoes 60 g11

A strong lunch with about 51 g of protein, so most of a day’s target is already covered. If you want it lighter, halve the rice before you touch anything else.

Confidence: medium. The oil is my guess. Remove it if the veg was dry.

The Gravitas G8 team

One coach is helpful.
Nine who talk to each other is a team.

Cal leads. Eight specialists sit around her, and they brief each other so you never repeat yourself. Tap anyone to meet them.

Kai

Ren

Jules

Riya

Mara

Nia

Theo

Sage

Cal · Head coach

Head coach · Nutrition

Cal

Cal runs the show. She logs, plans, explains your numbers, and decides when a specialist should step in.

"I'll keep the whole team pointed at your goal."

Behind the scenes

Your coaches have a group chat. It's about you.

Move leg day and your meals move with it. Sleep badly and the plan eases off. Every handover carries a briefing, so the next coach already knows the story.

Team memo · your weekToday, 07:12

Kai to CalLeg day has moved to Thursday this week. Heavier session than usual.

Cal to KaiDone. Thursday gets the bigger lunch and a proper snack before you train.

Sage to CalHeads up, sleep's been short on Wednesdays. I'll send a wind-down nudge at 22:00.

Jules to TeamThen I'll keep Wednesday's run easy. No intervals until Friday.

Cal to youYour week's updated. Nothing for you to do except turn up.

Find your coach

Which Gravitas8 coach
are you?

Five quick questions. You get the coach who fits you best, and they say hello.

Five questions. One coach who fits.

Answer honestly. There are no wrong answers, only a better match.

English Español Français العربية हिन्दी اردو 中文日本語 Português Deutsch Polski Türkçe বাংলা English Español Français العربية हिन्दी اردو 中文日本語 Português Deutsch Polski Türkçe বাংলা

Any language

She speaks 60 languages.
36 of them out loud.

Hello

Talk to Cal in the language you actually think in. Switch mid-sentence if you like. She keeps up.

CalHead coach · Nutrition

Live preview

Hi, I'm Cal. What did you eat today?

Hi Cal

Tap a language to switch

Between meals

Your week, planned.
Your form, checked.

Sunday night planning,
done before the kettle boils.

Cal plans seven days of meals around your training, then turns it into a shopping basket.

Your week7 days planned

Mon

Overnight oats

Chicken wrap

Salmon, rice, greens

Tue

Eggs on toast

Lentil soup

Run · easy 30 min

Turkey chilli

Wed

Greek yoghurt bowl

Leftover chilli

Veg stir fry

Thu

Porridge, banana

Leg day · Kai

Big chicken lunch

Pasta bake

Fri

Overnight oats

Tuna salad

Fakeaway curry

Sat

Pancakes

Halloumi wrap

Boxercise · Riya

Roast veg traybake

Sun

Brunch hash

Batch cook

Roast chicken

Basket10 items

Chicken thighs1 kg

Salmon fillets2

Basmati rice1 kg

Rolled oats1 kg

Greek yoghurt2 × 500 g

Red lentils500 g

Mixed peppers3

Wholemeal wraps8

Bananas6

Spinach200 g

Batch-cook Sunday, done by Wednesday. Your training days get the bigger plates.

Coach Eyes

✓Depth looks good

✓Knees tracking over toes

iBrace before you drop

Film one squat.
Get the note a coach would give.

Prop your phone up, do a rep, and Kai shows you what's working and what to tweak. With pictures, not paragraphs.

Form checks you can seeCoaches show proper form as images, not just text.

One rep at a timeDepth, knee tracking and bracing, with a note for each rep.

Step totals onlyDaily step counts, never your routes or your location.

Guess the Number

Think you know
your calories?

Three real supermarket match-ups from our weekly series. Pick the one with more, then see the twist.

Figures from UK supermarket labels, October 2026. Recipes change, so check the pack.

Question 1 of 3

Which has more?

Calories only. No butter, no toppings.

AOne plain bagelAbout 85g

BTwo slices of white toastFrom a sliced loaf

Bring your own wearable

Already wear something?
Cal reads it for free.

Connect the device you already own and the whole team coaches from your real sleep, recovery and activity. No add-on, no premium tier for it.

£0extra to connect any supported wearable

WHOOP £0 extra

RecoveryStrainSleepHRVWorkouts

Cal eases your plan on low-recovery days and fuels the hard ones. Kai sees your strain before he sets the next session.

Tap a device on the right to see what Cal reads from it.

FOUNDING MEMBER

Your name here

EST. 2027

The Founding Member offer

Join before launch.
Keep the perks for life.

Cal and eight specialist coaches go live on New Year's Day. Pre-register before then and these perks are yours for good.

Launching 00:00 UK time, Friday 1 January 2027

--Days

--Hours

--Minutes

--Seconds

Your Founding Member card

Friends who join with your link get the Founding Member perks too.

Free to pre-register. No card needed. Founding Member perks close at launch.

90 days of the full team, not 30Cal plus all eight specialists, three times the standard trial.

Launch price, locked for lifeWhatever happens to prices later, yours stays where it started.

Founding Member badgeOn your profile, for good. The coaches will know you were here first.

First in line for G8 HaloFounding Members hear first and get first access when it ships.

What's next · G8 Halo

Your whole coaching team.
Sitting just in front of your ears.

G8 Halo is an open-ear headset with a sensor chip built in. It plays your music, reads your body, and lets you talk to any coach mid-workout without touching your phone. Founding Members are first in line.

G8 Halo exploded view showing its sensors

G8 HaloTap the dots to look inside

Reads your body

Heart rate, HRV, blood oxygen, skin temperature, breathing rate, steps and cadence, from sensors that sit on the temple.

Talk to any coach

Say "Hey Cal" and ask. She answers in your ear, or hands you straight to Kai, Jules or whoever fits.

Music, motivation, cues

Your playlist, a coach talking you through the last set, or both, with cues ducked neatly over the music.

Ears stay open

Bone conduction leaves your ears free, so you still hear traffic on a run and your spotter in the gym.

Swim-proof

Built for the pool and the rain, with onboard storage so music plays without your phone.

Counts your reps

Head motion tracks tempo and reps, so Kai knows when you're grinding and when to call time.

Pairs with your CGM

Connect a glucose monitor and Theo reads your numbers into your ear, so you never stop to check a phone.

Works with your sensor

Pregnancy mode

Nia's gentler effort zones and temperature trends, built to sit alongside your midwife, never instead of them.

What you'll hear

Nine coaches. Nine real voices.
One in your ear when it counts.

Tap a coach to hear the kind of thing Halo says mid-workout. Every voice is the coach's own.

G8 Halo in three colours — Forest · Chalk · Graphite

G8 Halo on its charging dock — Bedside dock

G8 Halo is in development. Images are concept renders and features may change before release. Halo is a wellness device, not a medical device, and does not diagnose or monitor any condition.

What's next · The G8 range

Scan the tub.
Cal logs the scoop.

Our own protein range, built into the app from day one. One scan and every serving lands in your diary with the right numbers.

Whey · VanillaSmooth, not sickly

2027

Whey · ChocolateThe one everyone buys first

2027

Whey · Salted CaramelFor people who like dessert

2027

PlantVegan, dairy-free blend

2027

Clear WheyLight and fruity, in stick sachets

2027

Kit

Everything Cal would
put in your gym bag.

ConnectedG8 Scale

Weigh it and it's logged. The kitchen scale that talks to Cal.

HydrationShaker and steel bottle

Leak-proof shaker, and an insulated bottle that keeps cold for hours.

Meal prepGlass prep set

Sized to Cal's portions, so Sunday batch-cooking matches the plan.

ApparelTraining capsule

Hoodie, tee, leggings, cap and socks. Quiet logo, heavy fabric.

GymBag, bands and mat

Duffel, towel, three resistance bands and a cork yoga mat for Ren.

Founding Members hear first when the range drops.

Become a Founding Member

Meet Cal.She's alreadyread your plate.

Food diaries used to be homework.Now it's a photo.

Today

Snap your plate

Just say it

Scan the barcode

Now try it withyour own plate.

Go on.Ask her something.

One coach is helpful.Nine who talk to each other is a team.

Cal

Your coaches have a group chat. It's about you.

Which Gravitas8 coachare you?

Five questions. One coach who fits.

She speaks 60 languages.36 of them out loud.

Your week, planned.Your form, checked.

Sunday night planning,done before the kettle boils.

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Film one squat.Get the note a coach would give.

Think you knowyour calories?

Which has more?

Already wear something?Cal reads it for free.

WHOOP £0 extra

Join before launch.Keep the perks for life.

Your Founding Member card

Your whole coaching team.Sitting just in front of your ears.

Reads your body

Talk to any coach

Music, motivation, cues

Ears stay open

Swim-proof

Counts your reps

Pairs with your CGM

Pregnancy mode

Nine coaches. Nine real voices.One in your ear when it counts.

Scan the tub.Cal logs the scoop.

Everything Cal wouldput in your gym bag.

Meet Cal.
She's already
read your plate.

Food diaries used to be homework.
Now it's a photo.

Now try it with
your own plate.

Go on.
Ask her something.

One coach is helpful.
Nine who talk to each other is a team.

Which Gravitas8 coach
are you?

She speaks 60 languages.
36 of them out loud.

Your week, planned.
Your form, checked.

Sunday night planning,
done before the kettle boils.

Film one squat.
Get the note a coach would give.

Think you know
your calories?

Already wear something?
Cal reads it for free.

Join before launch.
Keep the perks for life.

Your whole coaching team.
Sitting just in front of your ears.

Nine coaches. Nine real voices.
One in your ear when it counts.

Scan the tub.
Cal logs the scoop.

Everything Cal would
put in your gym bag.