NSBasic, from what I've looked at, seems to be a VB script writer. That's why in runs in browers, etc. Looks like you have to use PhoneGap with it and also install Eclipse to generate a real apk. Also, looks that PhoneGap requires Mac OS 10.6 and no Windows Support. B4A produces very clean, optimized byte-code. I feel sure that B4A is a more powerful and complete IDE.