I will built an applications using Sencha Ext JS. I tried a little application in order to lean it. But I was wonder what are the difference between the GPL and the commercial license? I noticed that the code is exactly the same, and the way on programming also. So what are the advantages to buy the commercial license?
Thank you
The GPL license is for open source applications. If you are creating an open source application and are compatible with the GNU General Public License http://www.gnu.org/copyleft/gpl.html (providing source code etc.) you don't have to buy a commercial license.
If you are releasing an application for commercial purposes and do not plan on sharing the source code... you would have to buy a commercial license. The advantages? Staying legal, rewarding Sencha for their great framework and supporting future updates to the framework to name a few!
NOTE: I am not a Sencha representative and/or lawyer. Contact Sencha http://www.sencha.com/contact/ to find out exactly what is required for your particular situation.