Apps? You mean like for trying to find gold?
I see you've made some other posts. I'm originally from east Texas; grew up just north of Houston. To the best of my knowledge, have never stepped foot in gold-bearing country before. That said, Texas does have gold. I'm sure austin will chime in later to help you out. He's more up on where to go in Texas than I am. In all honesty, you'd have FAR better chances finding gold in east Texas if using a metal detector and looking for gold jewelry. Where there IS gold, there's not much of it!
As for the apps, I'm assuming you speak of tools you use for helping to find out the best spot to go to. Best advice you will ever hear is to look at where gold has already been found before. There are mountains of documentation; much of it via the BLM or USFS. However, there's also tons of private info on where gold strikes have been made.
Are you looking into this as a hobby or to make money?
Apps? for gold prospecting? There are none, and none are needed. You take a pan and a shovel to a river, preferably in a place where gold have been found in the past. Dig and pan, dig and pan. If you think the spot is good, dig and sluice, dig and sluice.
Just a warning, if you are in one of the major gold spots, you better learn to check for existing claims (and typically 90%+ will be claimed). PRospecting on anothers claim is mineral theft and punishable by law.
Thanks Jason! Further Question: how does one check for existing claims?
This is not an app but it is the best compilation of resources available with a focus on most aspects of gold (history, deposits, maps, claim information/location and on and on and on).....Welcome to Land Matters
There's an app called Digger's Map that I find useful for getting a quick idea of where gold has been found. It's the best mobile app I've come across, short of mapping apps. Sites like My Land Matters and The Diggings can provide far more detailed information but Diggers Map is easy and gets you pointed in the right direction.
Yes, yes, this is my favorite too. The app is free but you'll pay a few bucks for the gold data. It simply puts all the USGS data on an easy to use map. The data isn't exclusive to this app but I love it because it's SO easy to use to get a quick view of an area.
One caution, some of the USGS location data is wrong by up to a half mile or so. Use this as more of a guide than a bible. That said, most of the mine locations are right on!