From the app store description: “Strng is a string synthesiser inspired by the karplus-strong algorithm. The physical modelling starts with a short burst of noise that then guided by a tuned delay buffer and string tension filter, generates plucked string like sounds. No samples are used. ”
App type: App and AUv3
App store link: strng
Developer: Erik Sigth
Developer AB Forum Handle: @humbletune
There is an Audiobus Forum thread https://forum.audiob.us/discussion/8851/strng/p1 that includes some links to some nice examples of strng in use.
Developer's 2019 AUv3 launch video
The Sound Test Room AUv3 Demo
Developer's video (2015)