Stone - Travel Unit Converter 4+

Pocket Travel Companion

Yesterday Labs, LLC

Designed for iPhone

    • 5.0 • 1 Rating
    • Free
    • Offers In-App Purchases

iPhone Screenshots



While traveling do you ever wonder how fast km/h is in mph? How many ounces is in a liter? Stone helps you quickly convert units while traveling. With a simple feature set and intuitive design, using Stone is simple.

Stone is free to download and has a few unlocked units so you can try the app out. When you are ready, download the paid version to unlock everything.


Stone was created to convert currencies from around the world, distances, weights, volumes, speed and area. It contains tons of units to convert between. The six different types of conversions are always displayed so you can get to them quickly.


We are Yesterday Labs and we create apps that encourage people to have fun and be creative. We hope you love Stone. If you have any feedback we’d love to hear from you. You can contact us at, on Twitter @yesterdaylabs or Instagram @yesterdaylabs. Follow us to stay up-to-date.

What’s New

Version 1.1.0

We have identified and fixed bugs. made performance improvements and added area conversions. If you have an idea for improvements or find something that needs to be fixed, reach out to us on Twitter @yesterdaylabs or email us at with your findings. We appreciate your interest and support.

Ratings and Reviews

5.0 out of 5
1 Rating

1 Rating

In-App Purchases

Unlock Everything
All conversions. All updates. Forever.

App Privacy

The developer, Yesterday Labs, LLC, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.

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