I have a couple Kestrel 3500's I loan out for long range classes I teach. They will capture all the relevant information you need to plug into a ballistic solver on your phone. They are relatively inexpensive and are a great functional addition for a new shooter.
I also have a 5700 and love the instantaneous dope information. Easily pairs with your smartphone via Bluetooth. And, when set up correctly, will simultaneously populate all your ballistic solver environmental info if you want to compare dope outputs. (I run three solvers: Shooter, Kestrel (Applied Ballistics), and Hornady 4DOF.) The 5700 is the gold standard tool of choice for precision rifle shooting competitions in NRL and PRS matches.
If you have the means and want the best there is right now, get the new 5700 with the 4DOF solver, ESPECIALLY if you are shooting one or more bullets that exist in its drag coefficient library and your are running lots of different rifles and bullet combinations. The Hornady solver is free (online and phone app) and it arguably one of the most intuitive interfaces going right now. I've found it's dope to be the most precise of anything I've used when shooting at extreme angles.
The Kestrel 2700 is essentially the 3500 with an internal ballistics solver. They should be shipping soon. The price point is awesome at only $179 for pre-orders. If you're only going to be shooting one gun and one load at relatively shallow angles, you'd be hard pressed to find a better weather meter for the money.
