supersimple
ultrasimple
simplistic
easy peasy
haplo-
easyish
cake walk
forthright
onefold
purely and simply
nothing to it
easy as ABC
pimpsy
easy as pie
easy as falling off a log
simple as kiss your hand
easy as 123
piss-easy
simplish
there's nothing to it
uncomplicated
uncomplication
decomplication
child's play
severe
austere
stark
stern
plain sailing
supereasy
downhill
nimps
eathy
mick
straightforward
puddysticks
smooth
easy
doss
bludge
au naturel
spell things out
waltz
straightforwardly
cinch
like taking candy from a baby
loon
maffling
doof
woodcock
easify
uncryptic
open-and-shut
basical
sell
stock
lead-pipe cinch
plain as Dunstable highway
incomplex
dizzy
cut and dried
plainly
dumbed-down
doddle
simpleness
easy peasy lemon squeezy
rondoletto
uniplex
cinchy
supersimplification
monoplex
plainful
simplex
unstuffy
mawkin
streamlined
easefully
plain
jack-easy
paint by numbers
piece of piss
lor
spell out
oversimplicity
plaintively
layup
clear cut
eath
picnic
Barney-style
straight from the shoulder
cheaply
inexpensively
chaste
flatling
plat
unelaborate
tattily