diff --git a/app/src/main/java/xdsopl/robot36/ComplexDelay.java b/app/src/main/java/xdsopl/robot36/ComplexDelay.java
deleted file mode 100644
index 8a7e4c6..0000000
--- a/app/src/main/java/xdsopl/robot36/ComplexDelay.java
+++ /dev/null
@@ -1,27 +0,0 @@
-/*
-Complex digital delay line
-
-Copyright 2024 Ahmet Inan <xdsopl@gmail.com>
-*/
-
-package xdsopl.robot36;
-
-public class ComplexDelay {
-	public final int length;
-	private final Delay real;
-	private final Delay imag;
-	private final Complex temp;
-
-	ComplexDelay(int length) {
-		this.length = length;
-		this.real = new Delay(length);
-		this.imag = new Delay(length);
-		this.temp = new Complex();
-	}
-
-	Complex push(Complex input) {
-		temp.real = real.push(input.real);
-		temp.imag = imag.push(input.imag);
-		return temp;
-	}
-}
diff --git a/app/src/main/java/xdsopl/robot36/ComplexMovingAverage.java b/app/src/main/java/xdsopl/robot36/ComplexMovingAverage.java
deleted file mode 100644
index 02e22f2..0000000
--- a/app/src/main/java/xdsopl/robot36/ComplexMovingAverage.java
+++ /dev/null
@@ -1,21 +0,0 @@
-/*
-Complex Moving Average
-
-Copyright 2024 Ahmet Inan <xdsopl@gmail.com>
-*/
-
-package xdsopl.robot36;
-
-public class ComplexMovingAverage extends ComplexMovingSum {
-	public ComplexMovingAverage(int length) {
-		super(length);
-	}
-
-	public Complex avg() {
-		return sum().div(length);
-	}
-
-	public Complex avg(Complex input) {
-		return sum(input).div(length);
-	}
-}
diff --git a/app/src/main/java/xdsopl/robot36/ComplexMovingSum.java b/app/src/main/java/xdsopl/robot36/ComplexMovingSum.java
deleted file mode 100644
index 49293e9..0000000
--- a/app/src/main/java/xdsopl/robot36/ComplexMovingSum.java
+++ /dev/null
@@ -1,38 +0,0 @@
-/*
-Complex Moving Sum
-
-Copyright 2024 Ahmet Inan <xdsopl@gmail.com>
-*/
-
-package xdsopl.robot36;
-
-public class ComplexMovingSum {
-	public final int length;
-	private final SimpleMovingSum real;
-	private final SimpleMovingSum imag;
-	private final Complex temp;
-
-	ComplexMovingSum(int length) {
-		this.length = length;
-		this.real = new SimpleMovingSum(length);
-		this.imag = new SimpleMovingSum(length);
-		this.temp = new Complex();
-	}
-
-	void add(Complex input) {
-		real.add(input.real);
-		imag.add(input.imag);
-	}
-
-	Complex sum() {
-		temp.real = real.sum();
-		temp.imag = imag.sum();
-		return temp;
-	}
-
-	Complex sum(Complex input) {
-		temp.real = real.sum(input.real);
-		temp.imag = imag.sum(input.imag);
-		return temp;
-	}
-}
diff --git a/app/src/main/java/xdsopl/robot36/ExponentialMovingAverage.java b/app/src/main/java/xdsopl/robot36/ExponentialMovingAverage.java
index d35bb93..c4ba06c 100644
--- a/app/src/main/java/xdsopl/robot36/ExponentialMovingAverage.java
+++ b/app/src/main/java/xdsopl/robot36/ExponentialMovingAverage.java
@@ -14,18 +14,10 @@ public class ExponentialMovingAverage {
 		this.alpha = 1;
 	}
 
-	ExponentialMovingAverage(float alpha) {
-		this.alpha = alpha;
-	}
-
 	public float avg(float input) {
 		return prev = prev * (1 - alpha) + alpha * input;
 	}
 
-	public void reset() {
-		prev = 0;
-	}
-
 	public void reset(float alpha) {
 		this.alpha = alpha;
 		prev = 0;
diff --git a/app/src/main/java/xdsopl/robot36/SimpleMovingAverage.java b/app/src/main/java/xdsopl/robot36/SimpleMovingAverage.java
index 9a24c87..338ba5c 100644
--- a/app/src/main/java/xdsopl/robot36/SimpleMovingAverage.java
+++ b/app/src/main/java/xdsopl/robot36/SimpleMovingAverage.java
@@ -11,10 +11,6 @@ public class SimpleMovingAverage extends SimpleMovingSum {
 		super(length);
 	}
 
-	public float avg() {
-		return sum() / length;
-	}
-
 	public float avg(float input) {
 		return sum(input) / length;
 	}