Plan 3: Memory-based Entry + Single Write on Exit

In App OnStart:

powerapps

Set(AppIdentifier, "App1");
Set(SessionData, Blank());  // Initialize session tracking

On Screen.OnVisible (Store in memory only):

powerapps

// Store entry data in memory - NO SharePoint write
Set(
    SessionData,
    {
        EnterTime: Now(),
        AppName: AppIdentifier,
        ScreenName: App.ActiveScreen.Name,
        Username: Left(User().Email, Find("@", User().Email) - 1),
        ProjectID: If(IsBlank(YourSelectedProject), "None", YourSelectedProject.ID)
    }
);

On Screen.OnHidden (Write complete log):

powerapps

// Single write with complete session data
If(
    !IsBlank(SessionData),
    Patch(
        apps_text_log,
        Defaults(apps_text_log),
        {
            linelog: Text(SessionData.EnterTime, "yyyy-mm-dd hh:mm:ss") & "," &
                     Text(Now(), "yyyy-mm-dd hh:mm:ss") & "," &
                     SessionData.AppName & "," &
                     SessionData.ScreenName & "," &
                     SessionData.Username & "," &
                     SessionData.ProjectID & "," &
                     Text(DateDiff(SessionData.EnterTime, Now(), Seconds))
        }
    );
    
    Set(SessionData, Blank());  // Clear memory
);