Variometer‪+‬ 4+

Vertical Speed,Responsive,Fly

iSolid apps

    • 5.0 • 12 Ratings
    • Free
    • Offers In-App Purchases


Replace your vario hardware with the most responsive vario app on iOS. Also available for the Apple Watch.

Variometer+ is the most responsive variometer for your iPhone or/and Apple Watch. Works for all activities (paragliding, hang gliding, aviation, ...).
• Super reactive / responsive thanks to a very advanced algorithm
• Beeps like a real variometer (or haptic feedback on your wrist)
• Shows ground speed & altitude (sea level & relative to take-off)
• Sink alarm
• Entirely configurable (settings sync with Apple Watch through iCloud)
• Choose among several gauges
• Change units (m/s, ft/min, ...)
• Customize beeps tresholds
• Customize gauge max & min values based on your activity
• Customize the sound of your vario (frequency, cadence, ...) for maximum comfort
• Independent Apple Watch app (sound, haptic feedback, ...) → everything on your wrist
• ... and more

Use at your own risk. The creator cannot be held responsible for any issue that might arise. Common sense should prevail. Fly safe!
This app respects your privacy and does not collect any data.

Feedback is welcome and appreciated, you can contact me from within the app :-). Please be nice with me ;-).

About the algorithm:
This variometer is not an ordinary app. To provide this level of responsiveness, a very advanced mathematical technique is being used. This is called ‘Sensor fusion’. It uses data from multiple sensors of your devices, and combines them to increase accuracy and responsiveness. This has been developed in collaboration with researchers from the university of UCLouvain in Belgium.
Because of the efficiency, hence complexity, of the algorithm, a great amount of computational power is required. This is why, based on the tests, the advanced level of responsiveness is only available on recent devices. The app still works - but is less responsive - on older devices though.

The terms of use & privacy policy can be found here:

What’s New

Version 2.0.7

• Improved algorithm
• Faster loading time

Ratings and Reviews

5.0 out of 5
12 Ratings

12 Ratings

Bitburger_on_travel ,

Nice additions to our flight tools

I have been using this app on my watch in light off-season conditions. It seems to be working roughly as well as my external commercial Variometer.
It has a haptic option, which I thought would be useful but I guess I am too conditioned to sounds:-)
I haven’t used it in a wide range of conditions and flights yet, but I’m excited to have it with me. Thanks!

Stefano0001 ,

This app is incredible!!!!

I ran out of battery on my vario and only noticed on my way to the take off… this app saved me! So cool!!! Thank you for this gift

Developer Response ,

Amazing feedback! Thank you :-), and fly safe!

AustinKass ,

Unexpectedly sensitive

With this plus FlySkyHy, a phone might be the only instrument you need

App Privacy

The developer, iSolid apps, 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.

Privacy practices may vary, for example, based on the features you use or your age. Learn More

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