I know there are a variety of l5r dice rolling websites, but does anyone have an app for roll-and-keep?

There is (or was) a 7th Sea dice roller.

Any links would be helpful. I found a few things but nothing superb.

Search the Google Play Store for "7th Sea".

When you say "app", I assumed you meant phone.

Yep, that's exactly what we want. We're planning an l5r larp and we want to use the tabletop system but don't want to have to stop play to find a table and roll dice. A dice rolling phone app seems like the best solution.

I saw a, I think a L5R Larp, where they put the dice in a multicompartment plastic container shook it and picked the dice by what was face up. App wise there are all kinds of dice rolling apps. Are you iPhone or android?

Our players are all over the place so we're looking for multi-platform. Not everyone needs the same app but everyone should have something. I actually found a few so I think we're good at this point.

suburbaknight, can you share the ones you've found? Might be handy for others as well.

Thanks!

Websites
There are a number of websites with R&K programs up. I don't know how viable it is to run these from one's phone (I still have a flip phone) but give them a shot:
Kaze Shiro v. 2 : This is probably the best of the websites. It's efficient and easy to use, at least online.
Kaze Shiro v. 1 : The older version of Kaze Shiro. Basically the same thing but a text-based interface (rather than drop downs or buttons). Set up much more for 3e.

Apps and Programs
Source Forge Program : Decent program that can be run offline. Not the most flexible (no support for emphases) and I don't know if it can be run from a phone.
Kitterman App : There's some code here. I have no idea if it works or not.
L5r Dice Roller App : Free app that looks promising. Someone check it out and let us know if it works. Reviews are that it's functional but needs improvement (specifically it needs support for emphases and for die pools over 10). Appears in a lot of places online.
L5R Toolbox : Google Play app that can roll dice (though suffers from some limitations; see reviews). Can also track health and give probabilities.

7th Sea Dice Roller : There's also this through Google Play. Fairly simple but a lot of good reviews.