diff --git a/CHANGELOG.md b/CHANGELOG.md
index 03a5c523ed..71cae8b0f6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,11 @@
 - Add `sendModules` option for disable sending modules ([#2926](https://github.com/getsentry/sentry-java/pull/2926))
 - Send `db.system` and `db.name` in span data for androidx.sqlite spans ([#2928](https://github.com/getsentry/sentry-java/pull/2928))
 
+### Fixes
+
+- Always send memory stats for transactions ([#2936](https://github.com/getsentry/sentry-java/pull/2936))
+  - This makes it possible to query transactions by the `device.class` tag on Sentry
+
 ### Dependencies
 
 - Bump Gradle from v8.2.1 to v8.3.0 ([#2900](https://github.com/getsentry/sentry-java/pull/2900))
diff --git a/sentry-android-core/src/main/java/io/sentry/android/core/DeviceInfoUtil.java b/sentry-android-core/src/main/java/io/sentry/android/core/DeviceInfoUtil.java
index d74a8b1e2d..304a30116a 100644
--- a/sentry-android-core/src/main/java/io/sentry/android/core/DeviceInfoUtil.java
+++ b/sentry-android-core/src/main/java/io/sentry/android/core/DeviceInfoUtil.java
@@ -47,6 +47,8 @@ public final class DeviceInfoUtil {
   private final @Nullable ContextUtils.SideLoadedInfo sideLoadedInfo;
   private final @NotNull OperatingSystem os;
 
+  private final @Nullable Long totalMem;
+
   public DeviceInfoUtil(
       final @NotNull Context context, final @NotNull SentryAndroidOptions options) {
     this.context = context;
@@ -59,6 +61,13 @@ public DeviceInfoUtil(
     isEmulator = buildInfoProvider.isEmulator();
     sideLoadedInfo =
         ContextUtils.retrieveSideLoadedInfo(context, options.getLogger(), buildInfoProvider);
+    final @Nullable ActivityManager.MemoryInfo memInfo =
+      ContextUtils.getMemInfo(context, options.getLogger());
+    if (memInfo != null) {
+      totalMem = getMemorySize(memInfo);
+    } else {
+      totalMem = null;
+    }
   }
 
   @NotNull
@@ -132,6 +141,8 @@ public Device collectDeviceInformation(
       device.setProcessorCount(cpuFrequencies.size());
     }
 
+    device.setMemorySize(totalMem);
+
     // setting such values require IO hence we don't run for transactions
     if (collectDeviceIO && options.isCollectAdditionalContext()) {
       setDeviceIO(device, collectDynamicData);
@@ -193,16 +204,11 @@ private void setDeviceIO(final @NotNull Device device, final boolean includeDyna
     device.setOnline(connected);
 
     final @Nullable ActivityManager.MemoryInfo memInfo =
-        ContextUtils.getMemInfo(context, options.getLogger());
-    if (memInfo != null) {
-      // in bytes
-      device.setMemorySize(getMemorySize(memInfo));
-      if (includeDynamicData) {
+      ContextUtils.getMemInfo(context, options.getLogger());
+    if (memInfo != null && includeDynamicData) {
+        // in bytes
         device.setFreeMemory(memInfo.availMem);
         device.setLowMemory(memInfo.lowMemory);
-      }
-      // there are runtime.totalMemory() and runtime.freeMemory(), but I kept the same for
-      // compatibility
     }
 
     // this way of getting the size of storage might be problematic for storages bigger than 2GB
diff --git a/sentry-android-core/src/test/java/io/sentry/android/core/DeviceInfoUtilTest.kt b/sentry-android-core/src/test/java/io/sentry/android/core/DeviceInfoUtilTest.kt
index 5c90395e3b..c01da4b6e7 100644
--- a/sentry-android-core/src/test/java/io/sentry/android/core/DeviceInfoUtilTest.kt
+++ b/sentry-android-core/src/test/java/io/sentry/android/core/DeviceInfoUtilTest.kt
@@ -34,7 +34,7 @@ class DeviceInfoUtilTest {
     }
 
     @Test
-    fun `provides os and sideloaded info`() {
+    fun `provides os, memory and sideloaded info`() {
         val deviceInfoUtil = DeviceInfoUtil.getInstance(context, SentryAndroidOptions())
 
         val os = deviceInfoUtil.operatingSystem
@@ -48,6 +48,7 @@ class DeviceInfoUtilTest {
         assertNotNull(sideLoadedInfo.isSideLoaded)
 
         assertNotNull(deviceInfo.isSimulator)
+        assertNotNull(deviceInfo.memorySize)
     }
 
     @Test
@@ -106,7 +107,6 @@ class DeviceInfoUtilTest {
         val deviceInfoUtil = DeviceInfoUtil.getInstance(context, options)
         val deviceInfo = deviceInfoUtil.collectDeviceInformation(false, false)
 
-        assertNull(deviceInfo.memorySize)
         assertNull(deviceInfo.storageSize)
         assertNull(deviceInfo.freeStorage)
     }