# Stone - Travel Unit Converter — Pocket Travel Companion

> Travel unit converter for currencies, distances, weights, volumes, speed, and area. (iPhone/iPad app by Yesterday Labs, LLC.)

- Source: https://appshunter.io/ios/app/stone-travel-unit-converter/id1517251247 (this page in markdown: same URL + `.md`)
- Developer: [Yesterday Labs, LLC](https://appshunter.io/developer/1500455291)
- Category: Utilities, Travel
- Price: $1.99 with in-app purchases
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 13.4 · 4 MB
- Languages: English
- Released: 2020-06-10
- Data updated: 2026-07-07
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/stone-travel-unit-converter/id1517251247/reviews.md

## What is Stone?

INTRODUCING STONE

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.

CONVERT ANYTHING, ANYWHERE

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.

ABOUT US

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 stone@yesterdaylabs.com, on Twitter @yesterdaylabs or Instagram @yesterdaylabs. Follow us to stay up-to-date.

## Key features

- Currency conversion
- Distance conversion
- Weight conversion
- Volume conversion
- Speed conversion
- Area conversion

## Pricing and in-app purchases

Base price: $1.99.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Unlock Everything | $0.99 | one-time |



## Frequently asked questions about Stone

### 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.

## Version history (last 2 releases)

### 1.1.0 — 2020-07-22

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.

### 1.0.0 — 2020-06-11

No release notes.

## More apps by Yesterday Labs, LLC

- [Kelvin: Light Panel](https://appshunter.io/ios/app/kelvin-light-panel/id1562608316)
- [Everest Bike Computer](https://appshunter.io/ios/app/everest-bike-computer/id1665000684)

All apps by Yesterday Labs, LLC: https://appshunter.io/developer/1500455291

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-07.*