Wear
Wear Grumble discreetly during everyday life while it listens for patterns in digestive activity.
A new wearable for gut confidence
Food confidence
for real life.
Lunch shouldn’t decide
the rest of your day.
Grumble is developing a discreet wearable designed to help you discover patterns between what you eat and how your gut feels.
£49 today, £250 before dispatch. Refundable until your Grumble ships. Target delivery January 2027.
For people living with IBS
When food feels unpredictable, life can start to feel unpredictable too.
Lunch before a meeting. Dinner with friends. A meal while travelling.
When you live with IBS or recurring digestive discomfort, eating can become a calculation: What’s in this? How will I feel later? Should I risk it?
Food diaries ask you to remember everything. Elimination diets can take months. Generic advice cannot always explain why something feels fine one day and causes discomfort the next.
We believe there could be a better way.
Meet Grumble
Discreet by design.
Personal by nature.
Grumble is a soft band worn just below the ribs. No screen, no buttons, nothing to remember once it is on.
It is being designed to listen to the sounds your digestive system already makes, quietly and continuously, through an ordinary day at a desk, at the gym or asleep.
Those recordings are paired with what you log: a photograph of a meal, the time you ate, how you felt afterwards. Over enough days, we intend to explore whether the two together reveal patterns that neither shows on its own.
Not somebody else’s diet.
Not another list of forbidden foods.
A clearer picture of your own body.
The idea
Your gut is already communicating.
Grumble is being built to listen.
Digestive activity produces sound. Existing scientific research shows these sounds can be captured using sensors and that their patterns can change with meals and gastrointestinal activity.
Grumble’s goal is to bring this emerging science into everyday life: combining continuous gut-sound sensing with information about what you eat, what you do and how you feel.
The underlying science gives us a reason to build. The Founding 50 will help us discover how useful it can become.
How we intend it to work
Wear. Log. Learn.
Log
Photograph or record meals and note important moments, symptoms and changes in how you feel.
Learn
As repeated observations build, the app is intended to help reveal possible relationships between food, routines and digestive responses.
Not just what you ate
Real life is more complicated than a food diary.
Sleep, stress, exercise, timing, portion size and previous meals may all affect how somebody feels.
- Meal photographs
- Packaged-food barcode scans
- Ingredients and portion estimates
- Time of eating
- Self-reported symptoms
- Sleep and activity context
- Repeated exposures over time
- Patterns in digestive sound
The aim isn’t to judge every meal as “good” or “bad”. It’s to help build a more personal understanding of what happens next.
Built for real life
More confidence around
the moments that matter.
Workdays
Feel more prepared for meetings, commutes and long days away from home.
Plans ahead
Build a better understanding of patterns before days that matter.
Social plans
Approach meals out with more confidence and less second-guessing.
Everyday moments
Notice the small patterns that are difficult to remember alone.
The Founding 50
Help build the product
you wish already existed.
This is not a finished product sitting in a warehouse. Grumble is still in development. Your reservation shows that this problem matters, and gives you a say in to help shape what we build.
Reserve today£49
£250 before dispatch
£299 total Founding Member price
Founding price securedPriority first-release accessProduct research invitationsTransparent build updatesInput into app and wearableNumbered founding card
Target January 2027
Refundable before final order
Refundable before final order
Building in the open
A real attempt to solve
a difficult problem.
What we knowScientific research gives us evidence that digestive sounds contain useful information. Early prototypes give us reason to believe those signals can be captured outside a clinical environment.
What we need to learnWhat has not yet been established is whether Grumble can consistently connect those signals to particular foods and useful personal patterns across many people.
Our promiseFounding members will receive honest updates about our progress, setbacks, prototypes and learning. We won’t pretend the answer is known before we have tested it.
FAQs
Questions,
answered.
Grumble is not yet a finished or validated consumer product. Existing research shows that digestive sounds can be captured and contain information about gastrointestinal activity. We’re developing Grumble to investigate whether those signals can be combined with meal and symptom data to provide useful personal insights.
Your £49 payment reserves a place in the Founding 50 and secures the £299 Founding Member price. The full £49 is credited against your final purchase, leaving £250 to pay before dispatch.
Yes. You may request a refund at any time before confirming and paying for your final order. Full conditions will be presented before payment.
We are targeting January 2027 for the first production release. This is a development target rather than a guaranteed date. Founding members will receive transparent progress updates.
Grumble’s first product is intended as a general-wellness product, not a diagnostic device. It will not diagnose, treat, cure or prevent IBS or any other medical condition.
The final commercial model has not yet been confirmed. If Grumble later includes an optional or required subscription, its price and features will be clear before founding members confirm their final order.
Ready when you are
Food confidence
starts here.
60-second introduction · £49 reservation · £299 Founding Member price