diff --git a/Sources/Readability/Scorers/AutomatedReadabilityIndex.swift b/Sources/Readability/Scorers/AutomatedReadabilityIndex.swift
new file mode 100644
index 0000000..e92cf90
--- /dev/null
+++ b/Sources/Readability/Scorers/AutomatedReadabilityIndex.swift
@@ -0,0 +1,33 @@
+//
+//  AutomatedReadabilityIndex.swift
+//  
+//
+//  Created by Shibo Lyu on 2022/5/21.
+//
+
+
+import Foundation
+
+public struct RAAutomatedReadabilityIndexScorer: RAScorer {
+  public static let requiresCommonMetrics: Set<RACommonMetric>? = [
+    .wordCount,
+    .characterCount,
+    .sentenceCount
+  ]
+
+  public static let meta = RAScorerMeta(
+    name: "Automated Readability Index",
+    creator: "RJ Senter & EA Smith",
+    citation: "Senter, R. J., & Smith, E. A. (1967). Automated readability index. Cincinnati Univ OH."
+  )
+
+  public init() {}
+
+  public func score(_ text: String, metrics: RACommonMetricsCalculator.Results?) -> Double {
+    let wordCount = metrics![.wordCount]!
+    let characterCount = metrics![.characterCount]!
+    let sentenceCount = metrics![.sentenceCount]!
+
+    return 4.71 * (characterCount / wordCount) + 0.5 * (wordCount / sentenceCount) - 21.43
+  }
+}
diff --git a/Sources/Readability/Scorers/ColemanLiauIndex.swift b/Sources/Readability/Scorers/ColemanLiauIndex.swift
index 278b439..1bdd4c3 100644
--- a/Sources/Readability/Scorers/ColemanLiauIndex.swift
+++ b/Sources/Readability/Scorers/ColemanLiauIndex.swift
@@ -1,5 +1,5 @@
 //
-//  File.swift
+//  ColemanLiauIndex.swift
 //  
 //
 //  Created by Shibo Lyu on 2022/5/20.
@@ -15,7 +15,7 @@ public struct RAColemanLiauIndexScorer: RAScorer {
   ]
 
   public static let meta = RAScorerMeta(
-    name: "Coleman–Liau Index",
+    name: "Coleman-Liau Index",
     creator: "Meri Coleman & T. L. Liau",
     citation: "Coleman, M., & Liau, T. L. (1975). A computer readability formula designed for machine scoring. Journal of Applied Psychology, 60(2), 283."
   )
diff --git a/Sources/Readability/ScoringTask.swift b/Sources/Readability/ScoringTask.swift
index 5566e64..ed3c7f7 100644
--- a/Sources/Readability/ScoringTask.swift
+++ b/Sources/Readability/ScoringTask.swift
@@ -14,12 +14,14 @@ public class RAScoringTask {
     case fleschReadingEase
     case fleschKincaidGrade
     case colemanLiauIndex
+    case automatedReadabilityIndex
   }
 
   public static let availableScorers: [Scorer: RAScorer.Type] = [
     .fleschReadingEase: RAFleschReadingEaseScorer.self,
     .fleschKincaidGrade: RAFleschKincaidGradeScorer.self,
-    .colemanLiauIndex: RAColemanLiauIndexScorer.self
+    .colemanLiauIndex: RAColemanLiauIndexScorer.self,
+    .automatedReadabilityIndex: RAAutomatedReadabilityIndexScorer.self
   ]
 
   public var scorersToRun: Set<Scorer>