Gastly is a utility chrome extension that provides real-time gas prices for the Ethereum network. It also offers spot rates to help calculate estimated fees for basic transactions across three different speed preferences. The spot rates are sourced from centralized exchanges, ensuring accurate and up-to-date information.

The main goal of Gastly is to replace existing extensions like GasNow and offer a non-invasive utility tool for quickly checking gas prices and spot rates for your preferred fiat-ETH market pairs. The extension allows you to set your default gas price option based on your preference, providing a personalized experience.

What sets Gastly apart is its ability to generate fiat-denominated fees for basic transactions in real-time, using the streaming gas prices within the application. This feature enables users to have a clear understanding of the costs associated with their transactions.

If you find Gastly useful and want to support further enhancements, the developer, Mark Od, provides an Ethereum address for donations. Additionally, you can follow Mark on Twitter for more crypto-related projects and thoughts.

Overall, Gastly is a valuable chrome extension for Ethereum users who need real-time gas prices and spot rates, along with the convenience of fiat-denominated fee calculations.