Left:thread 糸, right: var. of wholly, exclusive 専 (The soil 一 is penetrated by a (sole) sprout 丨 in the rice field 田, cared for by a skillful hand 寸, which is exclusive)
Mnemonic
(The purpose of) A thread is wholly for binding sth.
Image of a hand 一 forearm 丨 and pulse 丶. It was originally also the distance of one inch (Length: 1 SUN = 3.03 cm) from the hand's palm to the pulse. This also stood for a small amount. In the mnemonic, it is used as "skillful hand" and partly also "to measure".
Tip: Go to the radicals that are contained in this character and learn all the characters with this radical systematically!
The app has many other functions, such as character selection according to difficulty, practice programs, handwriting recognition and success statistics!