diff --git a/supabase/functions/send-reminders/index.ts b/supabase/functions/send-reminders/index.ts
new file mode 100644
index 0000000..efb6c28
--- /dev/null
+++ b/supabase/functions/send-reminders/index.ts
@@ -0,0 +1,126 @@
+import { createClient } from 'https://esm.sh/@supabase/supabase-js@2';
+
+// Minimal Web Push implementation using Deno crypto
+// Copied verbatim from push-notify/index.ts
+async function sendWebPush(
+  subscription: { endpoint: string; keys: { p256dh: string; auth: string } },
+  payload: string,
+  vapidPrivateKeyB64: string,
+  vapidPublicKeyB64: string,
+): Promise<number> {
+  const endpoint = subscription.endpoint;
+  const audience = new URL(endpoint).origin;
+
+  const header = { alg: 'ES256', typ: 'JWT' };
+  const now = Math.floor(Date.now() / 1000);
+  const claims = {
+    aud: audience,
+    exp: now + 12 * 3600,
+    sub: 'mailto:admin@oskolkam.net',
+  };
+
+  const encode = (obj: object) =>
+    btoa(JSON.stringify(obj))
+      .replace(/\+/g, '-')
+      .replace(/\//g, '_')
+      .replace(/=+$/, '');
+
+  const headerB64 = encode(header);
+  const claimsB64 = encode(claims);
+  const signingInput = `${headerB64}.${claimsB64}`;
+
+  // Import private key from raw 32-byte scalar
+  const privKeyBytes = Uint8Array.from(
+    atob(vapidPrivateKeyB64.replace(/-/g, '+').replace(/_/g, '/')),
+    (c) => c.charCodeAt(0),
+  );
+  const cryptoKey = await crypto.subtle.importKey(
+    'raw',
+    privKeyBytes,
+    { name: 'ECDSA', namedCurve: 'P-256' },
+    false,
+    ['sign'],
+  );
+
+  const encoder = new TextEncoder();
+  const sig = await crypto.subtle.sign(
+    { name: 'ECDSA', hash: 'SHA-256' },
+    cryptoKey,
+    encoder.encode(signingInput),
+  );
+  const sigB64 = btoa(String.fromCharCode(...new Uint8Array(sig)))
+    .replace(/\+/g, '-')
+    .replace(/\//g, '_')
+    .replace(/=+$/, '');
+  const jwt = `${signingInput}.${sigB64}`;
+
+  const res = await fetch(endpoint, {
+    method: 'POST',
+    headers: {
+      'Authorization': `vapid t=${jwt},k=${vapidPublicKeyB64}`,
+      'Content-Type': 'application/octet-stream',
+      'TTL': '86400',
+    },
+    body: encoder.encode(payload),
+  });
+  return res.status;
+}
+
+const supabaseAdmin = createClient(
+  Deno.env.get('SUPABASE_URL')!,
+  Deno.env.get('SUPABASE_SERVICE_ROLE_KEY')!,
+);
+
+Deno.serve(async () => {
+  const now = new Date();
+  const from = new Date(now.getTime() + 50 * 60 * 1000).toISOString();
+  const to = new Date(now.getTime() + 70 * 60 * 1000).toISOString();
+
+  const { data: orders } = await supabaseAdmin
+    .from('orders')
+    .select('id, name, scheduled_at, address, film_thickness, area_sqm')
+    .gte('scheduled_at', from)
+    .lte('scheduled_at', to)
+    .neq('status', 'закрыт')
+    .is('reminder_sent_at', null);
+
+  if (!orders?.length) return new Response('no reminders', { status: 200 });
+
+  const { data: subs } = await supabaseAdmin.from('push_subscriptions').select('subscription');
+  if (!subs?.length) return new Response('no subscribers', { status: 200 });
+
+  const vapidPriv = Deno.env.get('VAPID_PRIVATE_KEY')!;
+  const vapidPub = Deno.env.get('VITE_VAPID_PUBLIC_KEY')!;
+
+  for (const order of orders) {
+    const time = new Date(order.scheduled_at).toLocaleTimeString('ru-RU', {
+      hour: '2-digit',
+      minute: '2-digit',
+    });
+    const body = `${order.name} — ${time}${order.address ? `, ${order.address}` : ''}`;
+    const payload = JSON.stringify({ title: 'Визит через 1 час', body, url: '/admin/kanban' });
+
+    for (const { subscription: sub } of subs) {
+      try {
+        const status = await sendWebPush(sub, payload, vapidPriv, vapidPub);
+        // Clean up expired/invalid subscriptions
+        if (status === 404 || status === 410) {
+          await supabaseAdmin
+            .from('push_subscriptions')
+            .delete()
+            .eq('subscription->>endpoint', sub.endpoint);
+        }
+      } catch (_) {
+        // Ignore individual push failures — don't abort the whole batch
+      }
+    }
+
+    // Mark reminder as sent to prevent duplicates
+    await supabaseAdmin
+      .from('orders')
+      .update({ reminder_sent_at: new Date().toISOString() })
+      .eq('id', order.id);
+  }
+
+  return new Response(`reminders sent: ${orders.length}`, { status: 200 });
+});
diff --git a/supabase/migrations/006_reminder_already_sent.sql b/supabase/migrations/006_reminder_already_sent.sql
new file mode 100644
index 0000000..91b71ea
--- /dev/null
+++ b/supabase/migrations/006_reminder_already_sent.sql
@@ -0,0 +1 @@
+ALTER TABLE orders ADD COLUMN IF NOT EXISTS reminder_sent_at TIMESTAMPTZ;