diff --git a/internal/app/statistics.go b/internal/app/statistics.go
index 7e00386..42abda5 100644
--- a/internal/app/statistics.go
+++ b/internal/app/statistics.go
@@ -3,6 +3,9 @@ package app
 import (
 	"context"
 	"errors"
+	"log/slog"
+	"sync"
+	"time"
 
 	"github.com/LazyBachelor/LazyPM/internal/models"
 	"github.com/LazyBachelor/LazyPM/internal/storage"
@@ -10,14 +13,17 @@ import (
 
 type StatisticsService struct {
 	storage *storage.Storage[models.Statistics]
+	logger  *slog.Logger
+	mu      sync.Mutex
 }
 
-func NewStatisticsService(storage *storage.Storage[models.Statistics]) (*StatisticsService, error) {
+func NewStatisticsService(storage *storage.Storage[models.Statistics], logger *slog.Logger) (*StatisticsService, error) {
 	if err := storage.Init(); err != nil {
 		return nil, err
 	}
 	return &StatisticsService{
 		storage: storage,
+		logger:  logger,
 	}, nil
 }
 
@@ -35,3 +41,83 @@ func (s *StatisticsService) GetStatistics() (models.Statistics, error) {
 	}
 	return *s.storage.Data, nil
 }
+
+func (s *StatisticsService) RecordTaskRun(ctx context.Context, run models.TaskRunMetrics) error {
+	_ = ctx
+
+	s.mu.Lock()
+	defer s.mu.Unlock()
+
+	if s.storage.Data == nil {
+		return errors.New("statistics data not initialized")
+	}
+
+	stats := s.storage.Data
+	now := time.Now()
+
+	if stats.StartTime.IsZero() {
+		stats.StartTime = run.StartedAt
+	}
+	if run.StartedAt.Before(stats.StartTime) {
+		stats.StartTime = run.StartedAt
+	}
+
+	stats.EndTime = now
+	stats.Duration = stats.EndTime.Sub(stats.StartTime)
+	stats.InterfaceType = run.InterfaceType
+
+	stats.TaskRuns++
+	stats.LastTaskName = run.TaskName
+	stats.LastRunID = run.RunID
+
+	if run.Completed {
+		stats.TasksCompleted++
+	} else {
+		stats.TasksFailed++
+	}
+
+	stats.TotalDurationMs += run.DurationMs
+	if stats.TaskRuns > 0 {
+		stats.AverageDurationMs = stats.TotalDurationMs / int64(stats.TaskRuns)
+	}
+
+	stats.ValidationAttempts += run.ValidationAttempts
+	stats.ValidationSuccesses += run.ValidationSuccesses
+	stats.ValidationFailures += run.ValidationFailures
+	stats.ValidationChecksPassed += run.ValidationChecksPassed
+	stats.ValidationChecksFailed += run.ValidationChecksFailed
+
+	userActions := 0
+	for _, log := range run.Logs {
+		if log.Level == "user_action" {
+			userActions++
+		}
+	}
+	stats.TotalUserActions += userActions
+	stats.ButtonClicks.Clicks += userActions
+	if run.QuestionnaireCompleted {
+		stats.QuestionnairesCompleted++
+	}
+	if run.QuestionnaireUserQuit {
+		stats.QuestionnairesAbandoned++
+	}
+
+	if err := s.storage.Save(); err != nil {
+		if s.logger != nil {
+			s.logger.Error("failed to save global statistics", "error", err)
+		}
+		return err
+	}
+
+	if s.logger != nil {
+		s.logger.Info("global statistics updated",
+			"task", run.TaskName,
+			"run_id", run.RunID,
+			"task_runs", stats.TaskRuns,
+			"completed", stats.TasksCompleted,
+			"failed", stats.TasksFailed,
+		)
+	}
+
+	return nil
+}