diff --git a/README.md b/README.md
index 636a451..1e583ef 100644
--- a/README.md
+++ b/README.md
@@ -15,8 +15,8 @@ The library supports:
 Note that for Android, the target phone **needs** to have ~~[Google Fit](https://www.google.com/fit/) or~~ [Health Connect](https://health.google/health-connect-android/) (which is currently in beta) installed and have access to the internet, otherwise this library will not work.
 
 ## Data Types
-- STEPS
-- WEIGHT
+- Steps
+- Weight
 
 ## Requesting permission
 
diff --git a/core/src/androidMain/kotlin/com/vitoksmile/kmp/health/HealthConnectDataType.kt b/core/src/androidMain/kotlin/com/vitoksmile/kmp/health/HealthConnectDataType.kt
index 086ac64..e319046 100644
--- a/core/src/androidMain/kotlin/com/vitoksmile/kmp/health/HealthConnectDataType.kt
+++ b/core/src/androidMain/kotlin/com/vitoksmile/kmp/health/HealthConnectDataType.kt
@@ -4,11 +4,14 @@ import androidx.health.connect.client.permission.HealthPermission
 import androidx.health.connect.client.records.Record
 import androidx.health.connect.client.records.StepsRecord
 import androidx.health.connect.client.records.WeightRecord
+import com.vitoksmile.kmp.health.HealthDataType.Steps
+import com.vitoksmile.kmp.health.HealthDataType.Weight
 import kotlin.reflect.KClass
 
 internal fun HealthDataType.toRecordType(): KClass<out Record> = when (this) {
-    HealthDataType.STEPS -> StepsRecord::class
-    HealthDataType.WEIGHT -> WeightRecord::class
+    Steps -> StepsRecord::class
+
+    Weight -> WeightRecord::class
 }
 
 /**
diff --git a/core/src/commonMain/kotlin/com/vitoksmile/kmp/health/HealthDataType.kt b/core/src/commonMain/kotlin/com/vitoksmile/kmp/health/HealthDataType.kt
index c3f5ce1..2a08fde 100644
--- a/core/src/commonMain/kotlin/com/vitoksmile/kmp/health/HealthDataType.kt
+++ b/core/src/commonMain/kotlin/com/vitoksmile/kmp/health/HealthDataType.kt
@@ -1,6 +1,7 @@
 package com.vitoksmile.kmp.health
 
-enum class HealthDataType {
-    STEPS,
-    WEIGHT,
+sealed interface HealthDataType {
+    data object Steps : HealthDataType
+
+    data object Weight : HealthDataType
 }
\ No newline at end of file
diff --git a/core/src/iosMain/kotlin/com/vitoksmile/kmp/health/HealthKitDataType.kt b/core/src/iosMain/kotlin/com/vitoksmile/kmp/health/HealthKitDataType.kt
index 609b8c2..b0b2548 100644
--- a/core/src/iosMain/kotlin/com/vitoksmile/kmp/health/HealthKitDataType.kt
+++ b/core/src/iosMain/kotlin/com/vitoksmile/kmp/health/HealthKitDataType.kt
@@ -1,14 +1,16 @@
 package com.vitoksmile.kmp.health
 
+import com.vitoksmile.kmp.health.HealthDataType.Steps
+import com.vitoksmile.kmp.health.HealthDataType.Weight
 import platform.HealthKit.HKQuantityType
 import platform.HealthKit.HKQuantityTypeIdentifierBodyMass
 import platform.HealthKit.HKQuantityTypeIdentifierStepCount
 import platform.HealthKit.HKSampleType
 
 internal fun HealthDataType.toHKSampleType(): HKSampleType? = when (this) {
-    HealthDataType.STEPS ->
+    Steps ->
         HKQuantityType.quantityTypeForIdentifier(HKQuantityTypeIdentifierStepCount)
 
-    HealthDataType.WEIGHT ->
+    Weight ->
         HKQuantityType.quantityTypeForIdentifier(HKQuantityTypeIdentifierBodyMass)
 }
\ No newline at end of file
diff --git a/sample/src/commonMain/kotlin/com/vitoksmile/kmp/health/sample/SampleApp.kt b/sample/src/commonMain/kotlin/com/vitoksmile/kmp/health/sample/SampleApp.kt
index 2f77a4a..b8e2574 100644
--- a/sample/src/commonMain/kotlin/com/vitoksmile/kmp/health/sample/SampleApp.kt
+++ b/sample/src/commonMain/kotlin/com/vitoksmile/kmp/health/sample/SampleApp.kt
@@ -28,6 +28,8 @@ import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.text.input.KeyboardType
 import androidx.compose.ui.unit.dp
 import com.vitoksmile.kmp.health.HealthDataType
+import com.vitoksmile.kmp.health.HealthDataType.Steps
+import com.vitoksmile.kmp.health.HealthDataType.Weight
 import com.vitoksmile.kmp.health.HealthManagerFactory
 import com.vitoksmile.kmp.health.HealthRecord
 import com.vitoksmile.kmp.health.records.StepsRecord
@@ -45,14 +47,14 @@ fun SampleApp() {
 
     val readTypes = remember {
         listOf(
-            HealthDataType.STEPS,
-            HealthDataType.WEIGHT,
+            Steps,
+            Weight,
         )
     }
     val writeTypes = remember {
         listOf(
-            HealthDataType.STEPS,
-            HealthDataType.WEIGHT,
+            Steps,
+            Weight,
         )
     }