hello forum, can anybody help, i bought my first iphone 3gs 16gb 10B500 model MC131B/A back in 2013

not knowing anything about them and THAT it was nearly a obsolete model at the time, I kept it up to date right uptill the last 6.1.6 update, now not long after accidently did a reset, and all my apps were gone, now I have the problem of very limited apps from the app store, due to new models, is ther any where I can get apps for my version, I also have not jailbroken it kind regards andi