4C Momentum

Wind Meter Lab — Accurate Wind Speed With Just Your Phone

Tired of carrying a bulky anemometer?
Now you can measure wind speed anytime, anywhere—using only your smartphone’s microphone.

• See How

Why Wind Meter Lab?

No extra hardware needed: Just your phone—always with you.
Easy & fast: Get wind readings instantly.
Accurate enough for real outdoor use.
Share and save: Keep a record, share with friends, or geo-tag your measurements.

• Learn More

• Learn more on our official product page

Coming Soon to iPhone!

We’re building Wind Meter Lab for iOS and want your feedback to make it perfect.
Do you:
Check wind conditions for your sport or hobby?
Wish wind measurement was easier, cheaper, and always at hand?
Care about sharing or saving your wind data?
Help shape the app—take our quick 1-minute survey!

• Take the Survey / Join iOS Waitlist

• Already on Android!

Already an Android user?
Share your thoughts and help us improve for everyone.

We use your feedback only to improve Wind Meter Lab.

• Take the Survey

• Get Wind Meter Lab for Android