Mash and Sparge Water

Anyone out there have a good mash/sparge water calculator they are willing to share? I’ve searched the www and haven’t found anything that works well on mobile devices.

Anymore i just use BeerSmith …but on laptop, not mobile.

The calculators at Brewer’s Friend are pretty good in my experience

Thanks for the replies. Just what I was looking for.

Mash with whatever ratio you like. Every 8 lb. of grain will absorb one gal. of water. Sparge with enough to get your boil volume.  It’s easy.