diff --git a/src/data.rs b/src/data.rs
index e5d52eb..fb79913 100644
--- a/src/data.rs
+++ b/src/data.rs
@@ -442,10 +442,11 @@ impl BrainData {
                 let node = match nodes
                     .iter()
                     .find(|n| n.public_key == c.node_pubkey)
-                    .cloned() {
-                        Some(n) => n,
-                        None => return c.locked_nano > 0,
-                    };
+                    .cloned()
+                {
+                    Some(n) => n,
+                    None => return c.locked_nano > 0,
+                };
                 if node.offline_minutes == 0 {
                     let operator_wallet = node.operator_wallet.clone();
                     let minutes_to_collect = (Utc::now() - c.collected_at).num_minutes() as u64;
@@ -1380,6 +1381,56 @@ impl BrainData {
             .collect()
     }
 
+    /// This is written to run every minute
+    pub async fn app_nodes_cron(&self) {
+        log::debug!("Running app nodes cron...");
+        let mut nodes = self.app_nodes.write().unwrap();
+        let mut app_contracts = self.app_contracts.write().unwrap();
+        for node in nodes.iter_mut() {
+            if self.daemon_tx.contains_key(&node.node_pubkey) {
+                node.offline_minutes = 0;
+                continue;
+            }
+            let mut operator = match self
+                .operators
+                .iter_mut()
+                .find(|o| o.app_nodes.contains(&node.node_pubkey))
+            {
+                Some(op) => op,
+                None => continue,
+            };
+            node.offline_minutes += 1;
+            // compensate contract admin if the node is offline more then 5 minutes
+            if node.offline_minutes > 5 {
+                for c in app_contracts
+                    .iter()
+                    .filter(|c| c.node_pubkey == node.node_pubkey)
+                {
+                    let compensation = c.price_per_minute() * 10;
+                    if compensation < operator.escrow {
+                        operator.escrow -= compensation;
+                        self.add_nano_to_wallet(&c.admin_pubkey, compensation);
+                    }
+                }
+            }
+        }
+        // delete nodes that are offline more than 3 hours, and clean contracts
+        nodes.retain(|n| {
+            if n.offline_minutes > 1600 {
+                app_contracts.retain_mut(|c| {
+                    if c.node_pubkey == n.node_pubkey {
+                        self.add_nano_to_wallet(&c.admin_pubkey, c.locked_nano);
+                    }
+                    c.node_pubkey != n.node_pubkey
+                });
+                for mut op in self.operators.iter_mut() {
+                    op.vm_nodes.remove(&n.node_pubkey);
+                }
+            }
+            n.offline_minutes <= 180
+        });
+    }
+
     pub async fn app_contracts_cron(&self) {
         let mut deleted_app_contracts: Vec<(String, String)> = Vec::new();
         log::debug!("Running app contracts cron...");
diff --git a/src/main.rs b/src/main.rs
index 9d2fdbb..cd2dbb9 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -29,6 +29,7 @@ async fn main() {
             tokio::time::sleep(tokio::time::Duration::from_secs(60)).await;
             data_clone.vm_nodes_cron().await;
             data_clone.vm_contracts_cron().await;
+            data_clone.app_nodes_cron().await;
             data_clone.app_contracts_cron().await;
             if let Err(e) = data_clone.save_to_disk() {
                 log::error!("Could not save data to disk due to error: {e}")