AI training coach · nutrition coach · one app

A personal trainer and a nutritionist. Awake whenever you are.

Most fitness apps hand you a plan for a gym you don't go to and a diet you'd never eat. Flexodus starts from what you've actually got: your equipment, your week, your food. Then it maps every muscle you train, so the gaps have nowhere to hide.

Get the app See how the body map works

iPhone & Android · Free plan, no card · Apple Health import on iPhone

Chest trained Triceps trained Hamstrings waiting

Your body map · front & back · updated after every session

It trains you

Blocks that fit your gym

A commercial gym, a rack in the garage, a pull-up bar, or a patch of floor. Tell it once and every plan after that respects it.

It feeds you

Meals without the maths

Type "chicken and rice", photograph the plate or scan the barcode. Every ingredient comes back separately, with a portion you can change.

It sees you

A map of what you've trained

Not a score out of ten. A body diagram, drawn for your body, that fills in where you work and shows you where you don't.

Your data never trains an AI model Nothing you log is shown to anyone else Coach chats stay on your phone Cancel in two taps Delete everything from inside the app

Chest trained Monday Triceps trained Thursday Biceps holding steady Glutes still waiting

Monday

You train chest.

Log the session and the map moves before you've left the gym. No weekly summary to wait for, no wondering whether it counted.

Thursday

Then arms.

Every exercise you log is matched to the muscles it actually works. The map fills itself in. You never tag a thing by hand.

Three weeks in

A picture forms.

Train something often and it holds its colour. This is your training as it happened, not as you remember it. Tap any muscle for its own detail.

And then

It shows you what you've been skipping.

Whatever you keep avoiding stays in the red, front and back. Arguing with a number is easy. Arguing with your own body is harder.

Four tabs. That's the whole app.

Home

Today, in one screen.

Calories, protein and water against your targets, and what you've burned from the sets you actually logged. Your AI credits sit under your name. Underneath, one tap logs water, training, a meal or your weight, scans food, or opens either coach.

Train

Your block, week by week.

A multi-week programme with this week's days laid out and today's session one tap from Start. Your sessions this week, your streak and where you are in the block sit right underneath, next to the coach, your routines and your records.

Meals

What's left, not just what's gone.

Protein, carbs and fat shown as what you've still got to eat today. One Add food button: type it, snap it, or tap something you've had before. Your water, your meal plan and your saved meals are all on the same screen.

Your progress, and your controls.

Total sessions, best streak, your body stats and daily targets, and the achievements you've earned. Apple Health, cycle tracking, language and your account are all here too, including deleting it.

Training

484 exercises. Every one with a video.

AI PLAN

Programmes in blocks, not one-off weeks

Blocks run up to six weeks, with a deload at the end. Flick between weeks, see which days you've ticked off, and the app works out which week you're on from the date.

NEW · WEEKLY CHECK-IN

How last week actually went

A look back at the week you just trained, sitting on the Train tab where you'll see it on Monday.

DEMO VIDEOS

Never guess a movement

Tap any exercise for a demo clip before your first set, so you're not copying the bloke next to you.

SWAP

Machine taken? Swap it.

Alternatives that train the same movement pattern. Sets you've already logged stay exactly where they are.

COACH TIP

One tip a day, from your real training

Not a quote off a poster. It reads what you've actually lifted and tells you where to push next.

PERSONAL RECORDS

8 core lifts, tracked for you

Beat one and you get a card worth sending to someone.

ASK THE TRAINING COACH

Ask it anything about your plan

It already knows your goal, your equipment, your days and how your last block went, so you get an answer for you rather than for "most people".

Meals

Other apps give you one number. We show the working.

ADD FOOD

Type it, snap it, or tap one you've had before

"Chicken and rice" comes back as two foods with sensible portions. A photographed plate comes back itemised. A barcode gets real product data, with drinks measured in millilitres. Whichever way in, every item stays editable.

MEAL PREP

Cook once, log it all week

Save a batch on Sunday and log a portion of it each day, without typing it in again.

MEAL PLAN

A plan around your diet

Built from your targets, your allergies and the foods you've told it you won't eat.

MEAL COACH

"What can I eat to finish today?"

It knows your targets, your allergies and the food you like, and answers with real meals.

ELITE · RECIPE BUILDER

Your own recipes, counted

Put a recipe together once and log it whenever you cook it.

WATER

A glass that fills up

One tap per drink, against a daily target that's yours.

FIX IT LATER

Got the portion wrong at breakfast?

Change it at lunch and the whole day recalculates. Nothing is hidden behind a single total, so there's always something you can correct.

And the rest of it

The small things that make it stick.

BODY MAP

Drawn for your body

Men's and women's anatomy, front and back. Tap a muscle to see how it's doing.

ACHIEVEMENTS

Credit for turning up

Milestones for weeks trained and sessions logged. Small, but they make a Tuesday easier.

DAY STREAK

Rest days count

If your plan says Monday is a rest day, taking it doesn't break your streak. Skipping a training day does.

APPLE HEALTH

Watch workouts import

Finish on the Watch and Flexodus offers you the session next time you open it, with the Watch's own calorie figure. You confirm each one. iPhone only for now.

SLEEP

Recovery, roughly

Reads time actually asleep from Apple Health and rates it on length and consistency. Labelled as a guide, because that's all it is.

CYCLE TRACKING

Built in properly

Log flow, mood, energy and symptoms on any day. After a couple of cycles it plots your weight, intake and training against your cycle. Switch it on or off from your profile.

CALORIES BURNED

From your sets

A heavy squat, a plank and a set of burpees don't cost the same, and the maths reflects that rather than averaging your day.

WEIGHT

Targets that follow you

Log your weight from Home and your calorie and macro targets recalculate the moment the number moves.

REMINDERS

A nudge, not a nag

Set your own reminders for training, food or water, on the days that suit you. Everything lands in one notifications bell on Home.

APP TOUR

Never lost in it

A guided tour on day one, and you can replay it from your profile whenever you like.

PRIVATE BY DESIGN

Nobody sees your numbers

No feed, no followers, no public profile. Your @tag just tells you apart from someone with the same name.

FIVE LANGUAGES

EN · DE · ES · FR · PT

The whole app, not just the menus. Every screen, every prompt, every button.

Pricing

Start free. Pay when the AI has earned it.

Free

£0 / forever

No card. No countdown.

Workout logger, routine builder and body map
Calorie, macro, water and weight tracking
Food logging — 5 scans a day by photo, barcode or text
Streaks, personal records and achievements
5 exercise demo videos to try
5 free messages with each AI coach

Everything you need to log properly. Nothing expires.

Fair things to ask.

How accurate are the calorie numbers?

They're estimates, and the app says so wherever it shows one. Barcode scans use real product data. Photo and text analysis use AI to identify foods and portions, which is good but not perfect, and that's exactly why every item stays editable. Calories burned are worked out from your logged sets and your bodyweight, a method that is commonly 20–30% out for any one person, so treat it as a trend rather than a measurement. Where your Apple Watch has recorded a heart-rate-based figure, Flexodus uses that instead.

Do I need a gym?

No. Pick "no equipment" during setup and every routine you get will use your bodyweight and the floor. There's a calisthenics mode if you've got a pull-up bar, and a home gym mode where you tick exactly what you own, whether that's a pair of dumbbells, a bench, some bands or all three. The AI treats that list as the complete picture and works around the gaps.

What does the body map actually measure?

It reads the exercises in your logged sessions, works out which muscle groups they hit, and colours the map to match. It's a picture of your training, not a body scan or a body-fat reading. It shows what you've done, not what you look like.

Can anyone else see my data?

No. There's no feed, no friends list and no public profile. Your @tag exists only to tell you apart from someone with the same name. What you log is yours, and nothing in the app shows it to another user.

What's an AI credit?

One credit is one reply from a coach. Pro gets 30 a day and Elite gets 100, resetting at midnight with no rollover, so you're never stuck mid-conversation counting down a monthly allowance. Your balance is always on the Home screen. On the free plan you get five messages with each coach to see whether it's any good before you pay for it.

Is my data used to train AI models?

No. Your logs and messages are used to answer you and nothing else. Coach conversations are kept on your phone rather than on our servers, which does mean they don't follow you to a new device. The full detail is in the privacy policy.

Does it work with Apple Watch?

Yes, on iPhone. Record a workout on your Watch and Flexodus offers it for import next time you open the app, using the Watch's own calorie figure. It reads your sleep too. Nothing is ever written back to Apple Health, and you confirm every import rather than having sessions turn up on their own. Android has no equivalent integration yet.

Does it track periods?

Yes, and it's a proper tracker rather than a checkbox. Log flow, mood, energy, sleep and symptoms on any day, with predictions that get more confident as your own cycles settle and stay honest about it when they don't. Once you've logged a couple of cycles it overlays your weight, calories and training volume against your cycle day, which is the thing most trackers never show you. It won't tell you to train differently by phase, because the evidence for that isn't there, and it isn't a way to plan or avoid pregnancy. It's off until you switch it on.

Can I cancel easily?

Yes. Subscriptions are handled by Apple and Google, so you cancel in your device settings and keep access until the end of the period you've paid for. We never see your card details. Step-by-step instructions here.

Get started

Your coach is already awake.

Flexodus is in its last stretch of testing on iPhone and Android. Join the beta and you'll get every build the day it ships. The things you complain about are the things that get fixed first.

Request beta access Talk to us