Adobe’s PhoneGap mobile app development framework for bringing HTML5 hybrid apps to mobile devices is incredibly popular, but even though developers love the fact that they can write cross-platform re-usable code with it, it’s not exactly known for being very fast. Steroids.js, a new project from AppGyver which officially launched today, aims to bridge this gap by combining PhoneGap’s solution with access to native user-interface components, navigations and animations.
Steroids then lets developers easily add these to PhoneGap HTML5 apps to allow them to build “HTML5 hybrid apps with animation and other performance results that are indistinguishable from those of native apps.”
As AppGyver founder and CEO Marko Lehtimaki noted when I talked to him earlier this week, the system is fully compatible with PhoneGap and even supports PhoneGap plug-ins. The tool has been in development for about 18 months now, he told me, and has been in private beta for almost a year. Now, the AppGyver team believes, it is ready for prime time and “fully battle-tested and production ready.” Lehtimaki told me his team has spent almost eight man-years working on fixing PhoneGap’s performance issues.
[vimeo http://www.vimeo.com/72341168 w=640&h=360]
The use of PhoneGap at the core of Steroids also means you get the same kind of hardware access as regular PhoneGap apps, including support for the device’s camera and microphone, for example. Steroids also has built-in CoffeeScript and Sass support and allows you to quickly set up a Ruby On Rails-like scaffold for your apps, featuring a number of generators to get your started. Overall, Lehtimaki estimates, using Steroids can speed up development times by up to 30 percent.
For developers, one of the nifty features of Steroids is that you can easily connect it to your device and see your code in action right away. Pushing an update to the device just takes one click and for debugging, the team integrated the Safari Development Tools to let you make changes to your code on the fly.
For easy ad-hoc distribution of the new app, Steroids uses a QR Code that you can quickly scan to load the app onto your device.
Disrupt 2026: The tech ecosystem, all in one room
Your next round. Your next hire. Your next breakout opportunity. Find it at TechCrunch Disrupt 2026, where 10,000+ founders, investors, and tech leaders gather for three days of 250+ tactical sessions, powerful introductions, and market-defining innovation. Register now to save up to $400.
Save up to $300 or 30% to TechCrunch Founder Summit
1,000+ founders and investors come together at TechCrunch Founder Summit 2026 for a full day focused on growth, execution, and real-world scaling. Learn from founders and investors who have shaped the industry. Connect with peers navigating similar growth stages. Walk away with tactics you can apply immediately
Offer ends March 13.
Steroids is free for developers who want to just give the service a try and for anybody who wants to develop open-source software with it. AppGyver also offers a commercial license, starting at $60 per month, for those who plan to release an app under their company name and for freelancers who will be developing for companies.

