Journeys are detected automatically
On foot, by bike or by car — Vumble recognises how you travelled, in the background. No start button, no manual entry.
Move. For you and for the planet.
Vumble recognises your everyday journeys and turns them into two numbers: the CO₂ you save compared to driving, and the calories you actively burn along the way. Your Vumble responds to both.
Soon on the
App Store
Soon on
Google Play
Coming soon — Vumble is on its way to the stores.
Everything stays on your device
No account needed
No ads
How it works
Three steps, no effort
Nothing to start, nothing to log. Vumble runs quietly in the background and speaks up when there's something to celebrate.
Two numbers come out of it
The CO₂ you saved compared to covering the same distance by car — and the calories you actively burned doing it.
Your Vumble responds
The more you move, the livelier your Vumble becomes. It celebrates with you — and waits patiently when there's less going on.
1.24kg CO₂
saved this week — compared to driving
2,140kcal
actively burned — estimated using MET values
Example values, for illustration.
A look inside
Clear, calm, friendly
No wall of charts, no lectures. Just what matters — and a Vumble that's rooting for you.
And there's more
Five energy levels
Vumble gets livelier the more you move
The levels aren't a verdict. They simply show how much momentum your everyday life has right now.
Snoozing
Vumble is dozing comfortably.
Awake
Eyes open, ready to go.
Lively
Vumble is cheerful and wide awake.
Full of pep
Now there's real energy in there.
Glowing
The highest level — Vumble shines.
One thing matters: when you move less, Vumble is simply tired. Not sad, not unwell, not disappointed. It waits — and it's glad when you get going again.
Sharing
Achievements worth showing
Vumble turns your numbers into a finished graphic — sized for a story, a chat or a feed. One tap, done.
- Designed for youNo image editing needed — the graphic comes straight from the app.
- Summarised figures onlyThe graphic shows totals — no maps, no routes, no locations.
- You decideNothing is shared automatically. Only what you pass on yourself.
Privacy
Your data stays on your device.
That's not a promise, it's how the app is built. There simply is nowhere for anything to go.
No server
Vumble has no backend. Your journeys, numbers and streaks live only on your phone.
No account
No sign-up, no email, no password. Install the app and get going.
Not even the permission
On Android the app doesn't hold the internet permission at all. It cannot send anything — not even by accident.
No tracking, no analytics, no advertising IDs. This website loads nothing from third-party servers either — which is why there's no cookie banner here.
Read the privacy policy
Where the numbers come from
Traceable, not guessed
Vumble doesn't invent values. Both numbers rest on publicly documented foundations.
CO₂ comparison
The reference is the same distance travelled by car. The emission factors come from the German Environment Agency.
- Source
- Umweltbundesamt (German Environment Agency)
- Reference year
- 2024
- Data basis
- TREMOD 6.71B
Active calories
Energy expenditure is estimated using MET values — the established measure of physical activity intensity, combined with duration and type of movement.
- Method
- Estimate based on MET values
- Factors
- Type of movement, duration, personal details