New application of airguns

Hi!
My girlfriend and I are lovers of airguns. Yesterday we launched an Android app and website, is a catalog of airguns where you can compare and see the features of each.
We want to improve the application 100%, any critique or suggestion would help.

The link to download the application in Android (english and spanish) is https://play.google.com/store/apps/details?id=com.domobile.catalogoairguns

For those who don’t have Android website is http://www.catalogoairguns.com/

I hope this is not taken as spam, we just want your suggestions.

Thanks!