diff --git a/Package.swift b/Package.swift
index f6a5332..63eaedc 100644
--- a/Package.swift
+++ b/Package.swift
@@ -6,15 +6,14 @@ let package = Package(
   name: "swift-estimated-pressures-core",
   platforms: [
     .iOS(.v16),
-    .macOS(.v11),
+    .macOS(.v13),
     .tvOS(.v14),
     .watchOS(.v7),
   ],
   products: [
-    .library(name: "AirflowAtPressureFeature", targets: ["AirflowAtPressureFeature"]),
+    .library(name: "CalculateAtFeature", targets: ["CalculateAtFeature"]),
     .library(name: "EstimatedPressureDependency", targets: ["EstimatedPressureDependency"]),
     .library(name: "SharedModels", targets: ["SharedModels"]),
-    .library(name: "TCAHelpers", targets: ["TCAHelpers"]),
   ],
   dependencies: [
     .package(
@@ -29,17 +28,21 @@ let package = Package(
       url: "https://github.com/tgrapperon/swift-dependencies-additions.git",
       from: "1.0.1"
     ),
+    .package(
+      url: "https://github.com/m-housh/swift-tca-extras.git",
+      from: "0.1.0"
+    ),
   ],
   targets: [
     .target(
-      name: "AirflowAtPressureFeature",
+      name: "CalculateAtFeature",
       dependencies: [
         "EstimatedPressureDependency",
         "SharedModels",
         "Styleguide",
-        "TCAHelpers",
         .product(name: "ComposableArchitecture", package: "swift-composable-architecture"),
-        .product(name: "DependenciesAdditions", package: "swift-dependencies-additions")
+        .product(name: "DependenciesAdditions", package: "swift-dependencies-additions"),
+        .product(name: "TCAExtras", package: "swift-tca-extras")
       ]
     ),
     .target(
@@ -52,12 +55,6 @@ let package = Package(
     ),
     .target(name: "SharedModels"),
     .target(name: "Styleguide"),
-    .target(
-      name: "TCAHelpers",
-      dependencies: [
-        .product(name: "ComposableArchitecture", package: "swift-composable-architecture"),
-      ]
-    ),
     .testTarget(
       name: "EstimatedPressureTests",
       dependencies: [
diff --git a/Sources/AirflowAtPressureFeature/AirflowAtPressure.swift b/Sources/AirflowAtPressureFeature/AirflowAtPressure.swift
deleted file mode 100644
index 1a81368..0000000
--- a/Sources/AirflowAtPressureFeature/AirflowAtPressure.swift
+++ /dev/null
@@ -1,189 +0,0 @@
-import ComposableArchitecture
-import DependenciesAdditions
-import EstimatedPressureDependency
-import SharedModels
-import Styleguide
-import SwiftUI
-import TCAHelpers
-
-@Reducer
-public struct AirflowAtPressureFeature {
-
-  @ObservableState
-  public struct State: Equatable {
-    public var isPresentingInfoView: Bool = false
-    public var existingAirflow: Double?
-    public var existingPressure: Double?
-    public var targetPressure: Double?
-    public var calculatedAirflow: Positive<Double>?
-
-    public init(
-      existingAirflow: Double? = nil,
-      existingPressure: Double? = nil,
-      targetPressure: Double? = 0.5,
-      calculatedAirflow: Positive<Double>? = nil
-    ) {
-      self.existingAirflow = existingAirflow
-      self.existingPressure = existingPressure
-      self.targetPressure = targetPressure
-      self.calculatedAirflow = calculatedAirflow
-    }
-
-    public var isValid: Bool {
-      existingAirflow != nil
-      && existingPressure != nil
-      && targetPressure != nil
-    }
-  }
-
-  public enum Action: BindableAction, ReceiveAction, ViewAction {
-    case binding(BindingAction<State>)
-    case receive(TaskResult<ReceiveAction>)
-    case view(View)
-
-    @CasePathable
-    public enum ReceiveAction {
-      case calculatedAirflow(Positive<Double>?)
-    }
-
-    @CasePathable
-    public enum View {
-      case dismissInfoViewButtonTapped
-      case infoButtonTapped
-      case resetButtonTapped
-      case submit
-    }
-  }
-
-  @Dependency(\.estimatedPressuresClient) var estimatedPressuresClient
-  @Dependency(\.logger["\(Self.self)"]) var logger
-
-  public var body: some Reducer<State, Action> {
-    BindingReducer()
-    Reduce<State, Action> { state, action in
-      switch action {
-      case .binding:
-        return .none
-
-      case let .receive(.failure(error)):
-        return .fail(error: error, logger: logger)
-
-      case let .receive(.success(action)):
-        switch action {
-        case let .calculatedAirflow(airflow):
-          state.calculatedAirflow = airflow
-          return .none
-        }
-
-      case let .view(action):
-        switch action {
-        case .dismissInfoViewButtonTapped:
-          state.isPresentingInfoView = false
-          return .none
-
-        case .infoButtonTapped:
-          state.isPresentingInfoView = true
-          return .none
-
-        case .resetButtonTapped:
-          state = .init()
-          return .none
-
-        case .submit:
-          guard state.isValid else { return .none }
-          return .receive(\.calculatedAirflow) { [state] in
-            try await estimatedPressuresClient.estimatedAirflow(.init(
-              existingAirflow: state.existingAirflow ?? 0,
-              existingPressure: state.existingPressure ?? 0,
-              targetPressure: state.targetPressure ?? 0
-            ))
-          }
-        }
-      }
-    }
-  }
-}
-
-@ViewAction(for: AirflowAtPressureFeature.self)
-public struct AirflowAtPressureView: View {
-
-  @Perception.Bindable
-  public var store: StoreOf<AirflowAtPressureFeature>
-
-  public init(store: StoreOf<AirflowAtPressureFeature>) {
-    self.store = store
-  }
-
-  public var body: some View {
-    Form {
-      Section {
-        TextField(
-          "Existing Airflow",
-          value: $store.existingAirflow,
-          format: .number,
-          prompt: Text("Airflow")
-        )
-        .onSubmit { send(.submit) }
-        .numberPad()
-
-        TextField(
-          "Existing Pressure",
-          value: $store.existingPressure,
-          format: .number,
-          prompt: Text("Existing Pressure")
-        )
-        .onSubmit { send(.submit) }
-        .decimalPad()
-
-        TextField(
-          "Target Pressure",
-          value: $store.targetPressure,
-          format: .number,
-          prompt: Text("Target Pressure")
-        )
-        .onSubmit { send(.submit) }
-        .decimalPad()
-
-      } header: {
-        HStack {
-          Text("Inputs")
-          Spacer()
-          InfoButton { send(.infoButtonTapped) }
-        }
-        .labelStyle(.iconOnly)
-      } footer: {
-        HStack {
-          Spacer()
-          Button("Reset") { send(.resetButtonTapped) }
-          Spacer()
-        }
-        .padding(.top)
-        .buttonStyle(.borderedProminent)
-      }
-
-      Section {
-        if let airflow = store.calculatedAirflow {
-          Text(airflow.positiveValue, format: .number.precision(.fractionLength(0)))
-        }
-      } header: {
-        Text("Calculated Airflow")
-      }
-    }
-    .sheet(isPresented: $store.isPresentingInfoView) {
-      NavigationStack {
-        AirflowAtPressureInfoView()
-          .toolbar {
-            Button("Done") { send(.dismissInfoViewButtonTapped) }
-          }
-      }
-    }
-  }
-}
-
-#Preview {
-  AirflowAtPressureView(
-    store: Store(initialState: AirflowAtPressureFeature.State()) {
-      AirflowAtPressureFeature()
-    }
-  )
-}
diff --git a/Sources/CalculateAtFeature/CalculateAtView.swift b/Sources/CalculateAtFeature/CalculateAtView.swift
new file mode 100644
index 0000000..1420221
--- /dev/null
+++ b/Sources/CalculateAtFeature/CalculateAtView.swift
@@ -0,0 +1,401 @@
+import ComposableArchitecture
+import DependenciesAdditions
+import EstimatedPressureDependency
+import SharedModels
+import Styleguide
+import SwiftUI
+import TCAExtras
+
+@Reducer
+public struct CalculateAtFeature {
+
+  @ObservableState
+  @dynamicMemberLookup
+  public struct State: Equatable {
+    public var focus: Focus? = nil
+    public var isPresentingInfoView: Bool = false
+    public var values: ValueContainer
+    public var calculationType: CalculationType
+
+    public init(
+      values: ValueContainer = .init(),
+      calculationType: CalculationType = .airflowAtNewPressure
+    ) {
+      self.values = values
+      self.calculationType = calculationType
+    }
+
+    public var isValid: Bool {
+      values.existingAirflow != nil
+      && values.existingPressure != nil
+      && values.targetValue != nil
+    }
+
+    public subscript<T>(dynamicMember keyPath: KeyPath<CalculationType, T>) -> T {
+      calculationType[keyPath: keyPath]
+    }
+
+    public subscript<T>(dynamicMember keyPath: WritableKeyPath<ValueContainer, T>) -> T {
+      get { values[keyPath: keyPath] }
+      set { values[keyPath: keyPath] = newValue }
+    }
+
+    public enum Focus: Hashable {
+      case existingAirflow
+      case existingPressure
+      case targetValue
+    }
+
+    public struct ValueContainer: Equatable {
+      public var existingAirflow: Double?
+      public var existingPressure: Double?
+      public var targetValue: Double?
+      public var calculatedValue: Double?
+
+      public init(
+        existingAirflow: Double? = nil,
+        existingPressure: Double? = nil,
+        targetValue: Double? = nil,
+        calculatedValue: Double? = nil
+      ) {
+        self.existingAirflow = existingAirflow
+        self.existingPressure = existingPressure
+        self.targetValue = targetValue
+        self.calculatedValue = calculatedValue
+      }
+    }
+
+    public enum CalculationType: Hashable, CaseIterable, Identifiable {
+      case airflowAtNewPressure
+      case pressureAtNewAirflow
+
+      public var id: Self { self }
+
+      private var precision: Int {
+        switch self {
+        case .airflowAtNewPressure:
+          return 0
+        case .pressureAtNewAirflow:
+          return 2
+        }
+      }
+
+      var format: FloatingPointFormatStyle<Double> {
+        .number.precision(.fractionLength(precision))
+      }
+
+      var targetLabel: String {
+        switch self {
+        case .airflowAtNewPressure:
+          return "Pressure"
+        case .pressureAtNewAirflow:
+          return "Airflow"
+        }
+      }
+
+      var calculationLabel: String {
+        switch self {
+        case .airflowAtNewPressure:
+          return "Airflow"
+        case .pressureAtNewAirflow:
+          return "Pressure"
+        }
+      }
+
+      var calculationLabelSpacing: CGFloat {
+        switch self {
+        case .airflowAtNewPressure:
+          return 5
+        case .pressureAtNewAirflow:
+          return 0
+        }
+      }
+
+      var calculationPostfix: String {
+        switch self {
+        case .airflowAtNewPressure:
+          return "CFM"
+        case .pressureAtNewAirflow:
+          return "\" w.c."
+        }
+      }
+
+      var label: String {
+        switch self {
+        case .airflowAtNewPressure:
+          return "Airflow at Pressure"
+        case .pressureAtNewAirflow:
+          return "Pressure at Airflow"
+        }
+      }
+    }
+  }
+
+  public enum Action: BindableAction, ReceiveAction, ViewAction {
+    case binding(BindingAction<State>)
+    case receive(TaskResult<ReceiveAction>)
+    case view(View)
+
+    @CasePathable
+    public enum ReceiveAction {
+      case calculatedValue(Positive<Double>?)
+    }
+
+    @CasePathable
+    public enum View {
+      case dismissInfoViewButtonTapped
+      case infoButtonTapped
+      case onAppear
+      case resetButtonTapped
+      case submit
+    }
+  }
+
+  @Dependency(\.estimatedPressuresClient) var estimatedPressuresClient
+  @Dependency(\.logger["\(Self.self)"]) var logger
+
+  public var body: some Reducer<State, Action> {
+    BindingReducer()
+    Reduce<State, Action> { state, action in
+      switch action {
+      case .binding(\.calculationType):
+        state.targetValue = nil
+        state.calculatedValue = nil
+        return .none
+
+      case .binding:
+        return .none
+
+      case let .receive(.success(.calculatedValue(calculatedAirflow))):
+        state.calculatedValue = calculatedAirflow?.positiveValue
+        return .none
+
+      case .receive:
+        return .none
+
+      case let .view(action):
+        switch action {
+        case .dismissInfoViewButtonTapped:
+          state.isPresentingInfoView = false
+          return .none
+
+        case .infoButtonTapped:
+          state.isPresentingInfoView = true
+          return .none
+
+        case .onAppear:
+          state.focus = .existingAirflow
+          return .none
+
+        case .resetButtonTapped:
+          state.values = .init()
+          return .none
+
+        case .submit:
+          guard state.isValid else {
+            return .none
+          }
+          return calculate(state: state)
+        }
+      }
+    }
+    .onFailure(.log(logger: logger))
+  }
+
+  func calculate(state: State) -> Effect<Action> {
+    return .receive(\.calculatedValue) { [state] in
+      switch state.calculationType {
+      case .airflowAtNewPressure:
+        return try await estimatedPressuresClient.estimatedAirflow(
+          .init(
+            existingAirflow: state.existingAirflow ?? 0,
+            existingPressure: state.existingPressure ?? 0,
+            targetPressure: state.targetValue ?? 0
+          )
+        )
+      case .pressureAtNewAirflow:
+        return try await estimatedPressuresClient.estimatedPressure(
+          existingPressure: state.existingPressure ?? 0,
+          existingAirflow: state.existingAirflow ?? 0,
+          targetAirflow: state.targetValue ?? 0
+        )
+      }
+    }
+
+  }
+}
+
+@ViewAction(for: CalculateAtFeature.self)
+public struct CalculateAtView: View {
+
+  @FocusState private var focus: CalculateAtFeature.State.Focus?
+
+  @Perception.Bindable
+  public var store: StoreOf<CalculateAtFeature>
+
+  let allowChangingCalculationType: Bool
+
+  public init(
+    allowChangingCalculationType: Bool = true,
+    store: StoreOf<CalculateAtFeature>
+  ) {
+    self.allowChangingCalculationType = allowChangingCalculationType
+    self.store = store
+    self.focus = store.focus
+  }
+
+  public var body: some View {
+    VStack {
+      if allowChangingCalculationType {
+        Picker("Calculation Type", selection: $store.calculationType) {
+          ForEach(CalculateAtFeature.State.CalculationType.allCases) {
+            Text($0.label)
+              .tag($0.id)
+          }
+        }
+        .pickerStyle(.segmented)
+        .labelsHidden()
+        .padding(.bottom)
+      }
+
+      Form {
+        Section {
+          TextField(
+            "Existing Airflow",
+            value: $store.existingAirflow,
+            format: .number,
+            prompt: Text("Existing Airflow")
+          )
+          .focused($focus, equals: .existingAirflow)
+          .onSubmit { send(.submit) }
+          .numberPad()
+
+          TextField(
+            "Existing Pressure",
+            value: $store.existingPressure,
+            format: .number,
+            prompt: Text("Existing Pressure")
+          )
+          .focused($focus, equals: .existingPressure)
+          .onSubmit { send(.submit) }
+          .decimalPad()
+
+          TextField(
+            "Target \(store.targetLabel)",
+            value: $store.targetValue,
+            format: .number,
+            prompt: Text("Target \(store.targetLabel)")
+          )
+          .focused($focus, equals: .existingPressure)
+          .onSubmit { send(.submit) }
+          .keyboard(for: store.calculationType)
+
+          if let airflow = store.calculatedValue {
+            HStack {
+              Text("Calculated \(store.calculationLabel)")
+                .foregroundStyle(Color.secondary)
+                .font(.callout.bold())
+              Spacer()
+              ZStack {
+                HStack(spacing: store.calculationLabelSpacing) {
+                  Text(airflow, format: store.format)
+                  Text(store.calculationPostfix)
+                }
+                .foregroundStyle(Color.white)
+                .font(.callout)
+                .bold()
+                .padding(.horizontal, 10)
+                .padding(.vertical, 5)
+              }
+              .background {
+                RoundedRectangle(cornerRadius: 10)
+                  .foregroundStyle(Color.green)
+                  .opacity(0.6)
+              }
+            }
+            .padding(.top)
+          }
+
+        } header: {
+          HStack {
+            Text("Inputs")
+            Spacer()
+            InfoButton { send(.infoButtonTapped) }
+          }
+          .labelStyle(.iconOnly)
+        } footer: {
+          HStack {
+            Spacer()
+            Button("Reset") { send(.resetButtonTapped) }
+            Spacer()
+          }
+          .padding(.top)
+          .buttonStyle(.borderedProminent)
+        }
+        .labelsHidden()
+      }
+
+      Spacer()
+    }
+    .bind($focus, to: $store.focus)
+    .onAppear { send(.onAppear) }
+    .sheet(isPresented: $store.isPresentingInfoView) {
+      NavigationStack {
+        InfoView(calculationType: store.calculationType)
+          .toolbar {
+            Button("Done") { send(.dismissInfoViewButtonTapped) }
+          }
+      }
+    }
+  }
+}
+
+fileprivate extension InfoView {
+
+  init(calculationType: CalculateAtFeature.State.CalculationType) {
+    switch calculationType {
+    case .airflowAtNewPressure:
+      self.init(
+        heading: """
+        Calculate the airflow at the target pressure from the existing airflow and existing pressure.
+        """,
+        body: """
+        This can be useful to determine the effect of a different blower speed on a specific measurement location (generally the supply or return plenum).
+        """
+      )
+    case .pressureAtNewAirflow:
+      self.init(
+        heading: """
+        Calculate the pressure at the target airflow from the existing airflow and existing pressure.
+        """,
+        body: """
+        This can be useful to determine the effect of a different blower speed on a specific measurement location (generally the supply or return plenum).
+        """
+      )
+    }
+  }
+}
+
+fileprivate extension View {
+  @ViewBuilder
+  func keyboard(for calculationType: CalculateAtFeature.State.CalculationType) -> some View {
+    switch calculationType {
+    case .airflowAtNewPressure:
+      self.decimalPad()
+    case .pressureAtNewAirflow:
+      self.numberPad()
+    }
+  }
+}
+
+#Preview {
+  CalculateAtView(
+    store: Store(initialState: CalculateAtFeature.State()) {
+      CalculateAtFeature()._printChanges()
+    }
+  )
+  #if os(macOS)
+  .frame(width: 400, height: 400)
+  .padding()
+  #endif
+}
diff --git a/Sources/AirflowAtPressureFeature/InfoView.swift b/Sources/Styleguide/InfoView.swift
similarity index 58%
rename from Sources/AirflowAtPressureFeature/InfoView.swift
rename to Sources/Styleguide/InfoView.swift
index 299da45..3e2865d 100644
--- a/Sources/AirflowAtPressureFeature/InfoView.swift
+++ b/Sources/Styleguide/InfoView.swift
@@ -1,20 +1,20 @@
 import SwiftUI
 
-struct AirflowAtPressureInfoView: View {
+public struct InfoView: View {
+  let headingText: String
+  let bodyText: String
 
-  static let heading = """
-  Calculate the airflow at the target pressure from the existing airflow and existing pressure.
-  """
 
-  static let body = """
-  This can be useful to determine the effect of a different blower speed on a specific measurement location (generally the supply or return plenum).
-  """
+  public init(heading headingText: String, body bodyText: String) {
+    self.headingText = headingText
+    self.bodyText = bodyText
+  }
 
-  var body: some View {
+  public var body: some View {
     VStack(spacing: 40) {
 
       ZStack {
-        Text(Self.heading)
+        Text(headingText)
           .font(.headline)
           .bold()
           .foregroundStyle(Color.white)
@@ -27,7 +27,7 @@ struct AirflowAtPressureInfoView: View {
 
 
       ZStack {
-        Text(Self.body)
+        Text(bodyText)
           .font(.callout)
           .padding()
       }
@@ -42,3 +42,7 @@ struct AirflowAtPressureInfoView: View {
     .padding(.horizontal)
   }
 }
+
+#Preview {
+  InfoView(heading: "Generic Info View", body: "Explain what this view does here...")
+}
diff --git a/Sources/TCAHelpers/Effect+fail.swift b/Sources/TCAHelpers/Effect+fail.swift
deleted file mode 100644
index 9a9ef10..0000000
--- a/Sources/TCAHelpers/Effect+fail.swift
+++ /dev/null
@@ -1,25 +0,0 @@
-import ComposableArchitecture
-import OSLog
-
-extension Effect {
-  public static func fail(
-    prefix: String = "Failed error:",
-    error: Error,
-    logger: Logger? = nil
-  ) -> Self {
-    let message = "\(prefix) \(error)"
-    XCTFail("\(message)")
-    logger?.error("\(message)")
-    return .none
-  }
-
-  public static func fail(
-    _ message: String,
-    logger: Logger? = nil
-  ) -> Self {
-    XCTFail("\(message)")
-    logger?.error("\(message)")
-    return .none
-  }
-}
-
diff --git a/Sources/TCAHelpers/Effect+receive.swift b/Sources/TCAHelpers/Effect+receive.swift
deleted file mode 100644
index d7de3bf..0000000
--- a/Sources/TCAHelpers/Effect+receive.swift
+++ /dev/null
@@ -1,40 +0,0 @@
-import ComposableArchitecture
-
-public protocol ReceiveAction<ReceiveAction>: CasePathable {
-  associatedtype ReceiveAction: CasePathable
-  static func receive(_ result: TaskResult<ReceiveAction>) -> Self
-}
-
-extension Effect where Action: ReceiveAction {
-
-  public static func receive(
-    _ operation: @escaping () async throws -> Action.ReceiveAction
-  ) -> Self {
-    .run { send in
-      await send(.receive(
-        TaskResult { try await operation() }
-      ))
-    }
-  }
-
-  public static func receive<T>(
-    _ operation: @escaping () async throws -> T,
-    transform: @escaping (T) -> Action.ReceiveAction
-  ) -> Self {
-    .run { send in
-      await send(.receive(
-        TaskResult { try await operation() }
-          .map(transform)
-      ))
-    }
-  }
-
-  public static func receive<T>(
-    _ toReceiveAction: CaseKeyPath<Action.ReceiveAction, T>,
-    _ operation: @escaping () async throws -> T
-  ) -> Self {
-    return .receive(operation) {
-      AnyCasePath(toReceiveAction).embed($0)
-    }
-  }
-}