i am carrying around 5 and 6 piece endgame databases! btw, it took me a minute to sort out how to use them so i will share...first you have to have room for the download and expansion...this is a tablebase reality. i think the total load is 5GB...but i may have that wrong. be sure to read, read, read before you download. next, you have to import the data into the small chess app...starting in the tablebase app in settings...it worked for me with zero issues, but ive got the biggest iphone 7 so i cant speak for the other iphone models.