diff --git a/src/js/api/Client.js b/src/js/api/Client.js
index c35e59f..1cee6c2 100644
--- a/src/js/api/Client.js
+++ b/src/js/api/Client.js
@@ -46,12 +46,12 @@ export default class Client {
       params: { date: `${formatDate(fromDate)}:${formatDate(toDate)}` },
     })
 
-  bookedHours = service => {
+  activitiesStatus = service => {
     if (!service) {
       return Promise.resolve({ data: { hours: 0 } })
     }
-    return this.#client.get("activities/tags", {
-      params: { selection: [service.id], remote_service: service.name },
+    return this.#client.get("activities/status", {
+      params: { remote_id: service.id, remote_service: service.name },
     })
   }
 
diff --git a/src/js/background.js b/src/js/background.js
index 3eb9617..70ac8cb 100644
--- a/src/js/background.js
+++ b/src/js/background.js
@@ -33,11 +33,12 @@ chrome.runtime.onMessage.addListener(action => {
           .createActivity(activity)
           .then(() => {
             messenger.postMessage(tab, { type: "closePopup" })
-            apiClient.bookedHours(service).then(({ data }) => {
+            apiClient.activitiesStatus(service).then(({ data }) => {
               messenger.postMessage(tab, {
                 type: "showBubble",
                 payload: {
-                  bookedHours: parseFloat(data[0]?.hours) || 0,
+                  bookedHours: parseFloat(data.hours),
+                  timedActivity: data.timed_activity,
                   service,
                 },
               })
diff --git a/src/js/components/Bubble.js b/src/js/components/Bubble.js
index 1e680d1..b80e0b5 100644
--- a/src/js/components/Bubble.js
+++ b/src/js/components/Bubble.js
@@ -1,18 +1,36 @@
 import React from "react"
 import PropTypes from "prop-types"
-import logoUrl from "images/moco-159x159.png"
+import mocoLogo from "images/moco-32x32.png"
+import mocoTimerLogo from "images/moco-timer-32x32.png"
+import { parseISO } from "date-fns"
+import Timer from "./shared/Timer"
 
-const Bubble = ({ bookedHours }) => (
-  <div className="moco-bx-bubble-inner">
-    <img className="moco-bx-logo" src={chrome.extension.getURL(logoUrl)} />
-    {bookedHours > 0 ? (
-      <span className="moco-bx-booked-hours">{bookedHours.toFixed(2)}</span>
-    ) : null}
-  </div>
-)
+const Bubble = ({ bookedHours, timedActivity }) => {
+  const logo = timedActivity ? mocoTimerLogo : mocoLogo
+
+  return (
+    <div className="moco-bx-bubble-inner">
+      <img className="moco-bx-logo" src={chrome.extension.getURL(logo)} />
+      {!timedActivity && bookedHours > 0 && (
+        <span className="moco-bx-booked-hours">{bookedHours.toFixed(2)}</span>
+      )}
+      {timedActivity && (
+        <Timer
+          startedAt={parseISO(timedActivity.timer_started_at)}
+          offset={timedActivity.seconds}
+          style={{ color: "red", marginBottom: "3px", fontSize: "12px" }}
+        />
+      )}
+    </div>
+  )
+}
 
 Bubble.propTypes = {
   bookedHours: PropTypes.number,
+  timedActivity: PropTypes.shape({
+    timer_started_at: PropTypes.string.isRequired,
+    seconds: PropTypes.number.isRequired,
+  }),
 }
 
 Bubble.defaultProps = {
diff --git a/src/js/components/shared/Timer.js b/src/js/components/shared/Timer.js
new file mode 100644
index 0000000..f454821
--- /dev/null
+++ b/src/js/components/shared/Timer.js
@@ -0,0 +1,28 @@
+import React, { useState } from "react"
+import PropTypes from "prop-types"
+import { useInterval } from "./hooks"
+import { differenceInSeconds, addSeconds, startOfDay, format } from "date-fns"
+
+Timer.propTypes = {
+  startedAt: PropTypes.instanceOf(Date).isRequired,
+  offset: PropTypes.number,
+  onTick: PropTypes.func,
+}
+
+function Timer({ startedAt, offset = 0, onTick, ...domProps }) {
+  const [timerLabel, setTimerLabel] = useState(formattedTimerLabel(startedAt, offset))
+
+  useInterval(() => {
+    setTimerLabel(formattedTimerLabel(startedAt, offset))
+    onTick && onTick()
+  }, 1000)
+
+  return <span {...domProps}>{timerLabel}</span>
+}
+
+function formattedTimerLabel(startedAt, offset) {
+  const seconds = differenceInSeconds(new Date(), startedAt) + offset
+  return format(addSeconds(startOfDay(new Date()), seconds), "HH:mm:ss")
+}
+
+export default Timer
diff --git a/src/js/components/shared/hooks.js b/src/js/components/shared/hooks.js
new file mode 100644
index 0000000..dfb6f90
--- /dev/null
+++ b/src/js/components/shared/hooks.js
@@ -0,0 +1,18 @@
+import { useEffect, useRef } from "react"
+
+export function useInterval(callback, delay) {
+  const savedCallback = useRef()
+
+  useEffect(() => {
+    savedCallback.current = callback
+  })
+
+  useEffect(() => {
+    function tick() {
+      savedCallback.current()
+    }
+
+    let id = setInterval(tick, delay)
+    return () => clearInterval(id)
+  }, [delay])
+}
diff --git a/src/js/content.js b/src/js/content.js
index 33bbdda..097822d 100644
--- a/src/js/content.js
+++ b/src/js/content.js
@@ -25,7 +25,7 @@ chrome.runtime.onConnect.addListener(function(port) {
     document.removeEventListener("click", clickHandler, true)
   })
 
-  function updateBubble({ service, bookedHours } = {}) {
+  function updateBubble({ service, bookedHours, timedActivity } = {}) {
     if (!document.getElementById("moco-bx-root")) {
       const domRoot = document.createElement("div")
       domRoot.setAttribute("id", "moco-bx-root")
@@ -47,7 +47,7 @@ chrome.runtime.onConnect.addListener(function(port) {
           // eslint-disable-next-line react/display-name
           (props => (
             <animated.div className="moco-bx-bubble" style={{ ...props, ...service.position }}>
-              <Bubble key={service.url} bookedHours={bookedHours} />
+              <Bubble key={service.url} bookedHours={bookedHours} timedActivity={timedActivity} />
             </animated.div>
           ))
         }
@@ -86,8 +86,8 @@ chrome.runtime.onConnect.addListener(function(port) {
     })
   })
 
-  messenger.on("showBubble", ({ payload: { service, bookedHours } }) => {
-    updateBubble({ service, bookedHours })
+  messenger.on("showBubble", ({ payload }) => {
+    updateBubble(payload)
   })
 
   messenger.on("hideBubble", () => {
diff --git a/src/js/utils/messageHandlers.js b/src/js/utils/messageHandlers.js
index d9eb3a7..538c03e 100644
--- a/src/js/utils/messageHandlers.js
+++ b/src/js/utils/messageHandlers.js
@@ -25,12 +25,13 @@ export function tabUpdated(tab, { messenger, settings }) {
 
     messenger.once("newService", ({ payload: { service } }) => {
       apiClient
-        .bookedHours(service)
+        .activitiesStatus(service)
         .then(({ data }) => {
           messenger.postMessage(tab, {
             type: "showBubble",
             payload: {
-              bookedHours: parseFloat(data[0]?.hours) || 0,
+              bookedHours: parseFloat(data.hours),
+              timedActivity: data.timed_activity,
               service,
             },
           })
@@ -89,6 +90,7 @@ async function openPopup(tab, { service, messenger }) {
       apiClient.activities(fromDate, toDate),
       apiClient.schedules(fromDate, toDate),
     ])
+
     const action = {
       type: "openPopup",
       payload: {