Haruku Mizoshita's first iOS app is an AUv3 delay. DL01 is free and can be used in ping-pong mode or as a synchronized delay.
DL01 - simple delayThis is a simple Delay Effect Plugin created using JUCE.
It fully supports the functionality as an Audio Units (AUv3) plugin extension.
You can use it as a ping-pong delay or as a delay synchronized with the DAW tempo. You can also use it as a looper or drone synth using the Freez function.