diff --git a/src/main/services/process-watcher.ts b/src/main/services/process-watcher.ts
index b17a594f..5bc81d26 100644
--- a/src/main/services/process-watcher.ts
+++ b/src/main/services/process-watcher.ts
@@ -96,7 +96,7 @@ export const watchProcesses = async () => {
     const runningGames = Array.from(gamesPlaytime.entries()).map((entry) => {
       return {
         id: entry[0],
-        sessionDurationInMillis: entry[1].firstTick - performance.now(),
+        sessionDurationInMillis: performance.now() - entry[1].firstTick,
       };
     });
 
diff --git a/src/renderer/src/hooks/use-date.ts b/src/renderer/src/hooks/use-date.ts
index 9b60a4a0..01f55610 100644
--- a/src/renderer/src/hooks/use-date.ts
+++ b/src/renderer/src/hooks/use-date.ts
@@ -53,7 +53,7 @@ export function useDate() {
       }
     },
 
-    formatDistanceInMillis: (
+    formatDiffInMillis: (
       millis: number,
       baseDate: string | number | Date,
       options?: FormatDistanceOptions
diff --git a/src/renderer/src/pages/user/user-content.tsx b/src/renderer/src/pages/user/user-content.tsx
index 31e68328..98aad705 100644
--- a/src/renderer/src/pages/user/user-content.tsx
+++ b/src/renderer/src/pages/user/user-content.tsx
@@ -42,7 +42,7 @@ export function UserContent({
     });
   }, [i18n.language]);
 
-  const { formatDistance, formatDistanceInMillis } = useDate();
+  const { formatDistance, formatDiffInMillis } = useDate();
 
   const formatPlayTime = () => {
     const seconds = userProfile.libraryGames.reduce(
@@ -160,9 +160,9 @@ export function UserContent({
               </div>
               <small>
                 {t("playing_for", {
-                  amount: formatDistanceInMillis(
+                  amount: formatDiffInMillis(
                     runningGame.sessionDurationInMillis,
-                    new Date().getTime()
+                    new Date()
                   ),
                 })}
               </small>