Vumble
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Only for iPhone
Free
iPhone
Vumble spots your everyday trips automatically — on foot, by bike, bus, train or car. No start button. Put your phone in your pocket and go.
From that, Vumble makes two numbers: how much CO₂ your trip caused compared to driving, and how many active calories you burned along the way.
A MASCOT INSTEAD OF A TARGET
Vumble has five energy levels, from Snoozing to Glowing. Move a lot and he perks up. Move little and he gets sleepy. That's all that happens. No red numbers, no missed goal, no nagging.
YOUR DATA STAYS WITH YOU
No account. No server. No ads. No subscriptions. Everything Vumble measures sits on your phone and goes nowhere else. The app is free and works without signing up.
WHAT VUMBLE SHOWS
- CO₂ compared to driving, day by day and across the week
- Active calories, translated into trees and cookies
- Your streak: days you got moving
- Your week as a tappable story
CO₂ figures are based on emission factors from the German Environment Agency (TREMOD 6.71B, reference year 2024).
Vumble needs background access to your location so it can spot trips without a start button. Your location never leaves your device.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Vumble now detects walks even if you closed the app beforehand, and fills in missed trips from the last few days. Notifications only arrive once you have actually moved, and no longer twice. The privacy policy has been updated to version 1.5.
The developer, Daniel Wulf, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Daniel Wulf
- Size
- 34.6 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later.
- iPhone
- Location
- This app may use your location even when it isn’t open, which can decrease device battery life.
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Daniel Wulf