Stone - Travel Unit Converter
Pocket Travel Companion
Archived App (Last seen on 14 Mar 2026)
This is an archived listing of the app previously available on the App Store.Although the app is no longer distributed by Apple, you can still view its description, screenshots, version history, ratings, and metadata for reference.
About
Easily convert travel-related units like speed, distance, and volume while on the go. This app offers a simple interface for quick conversions of currencies, weights, and areas. Unlock all units with a one-time purchase.
What's New in Stone
1.1.0
July 22, 2020
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 hello@yesterdaylabs.com with your findings. We appreciate your interest and support.
MoreIn-App Purchases
$0.99
Unlock Everything
All conversions. All updates. Forever.
Developer apps
FAQ
What types of units can Stone convert?
Stone can convert currencies, distances, weights, volumes, speed, and area. It offers six different types of conversions that are always displayed for quick access.
Is Stone free to download?
Yes, Stone is free to download and offers a few unlocked units for you to try out. To unlock all units, a paid version is available.
What is the price of the paid version of Stone?
The paid version of Stone is priced at $1.99. This one-time purchase unlocks all available units for conversion.
What devices does Stone support?
Stone is available for iPhone and iPod devices. It is designed for Apple's mobile operating systems.
How often is Stone updated?
The latest version of Stone is 1.1.0, which was last updated on July 22, 2020. The app was initially released on June 10, 2020.
What is the age rating for Stone?
Stone has an age rating of 4+, making it suitable for young children and above. This indicates it contains no mature content.
Does Stone have ads?
No, Stone does not contain advertisements. The app is ad-free, providing an uninterrupted user experience.
How can I provide feedback for Stone?
You can provide feedback for Stone by contacting the developers at stone@yesterdaylabs.com, or through their Twitter (@yesterdaylabs) and Instagram (@yesterdaylabs) accounts.