# Automatic Course Update Alerts - Free Tools to Monitor Udemy, Coursera & Any Platform

**URL:** <https://onehack.st/t/automatic-course-update-alerts-free-tools-to-monitor-udemy-coursera-any-platform/313993>\
**Category:** Tutorials & Methods\
**Tags:** programming\
**Created:** [November 24, 2025, 4:17pm UTC](https://onehack.st/t/automatic-course-update-alerts-free-tools-to-monitor-udemy-coursera-any-platform/313993 "2025-11-24T16:17:09Z")\
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<div class="post-metadata">

**Author:** ![SRZ](https://onehack.st/user_avatar/onehack.st/srz/32/146132_2.png) [@SRZ](https://onehack.st/u/SRZ)\
**Post date:** [November 24, 2025, 4:17pm UTC](https://onehack.st/t/automatic-course-update-alerts-free-tools-to-monitor-udemy-coursera-any-platform/313993/1 "2025-11-24T16:17:10Z")

</div>

Stop Refreshing Udemy Like a Psycho — Let Updates Chase YOU Instead 🧠📲

> **🗺 One-Line Flow:**  
> Your courses get updated → you get a ping → you stop stalking Udemy like an ex. Life becomes peaceful.

![Tired Tom And Jerry GIF](https://onehack.st/uploads/default/original/3X/e/d/edbae9047e60da94e68b68e9bff5b2dc956f6814.gif)

* * *

## 🎯 What This Whole Thing Does (Human Edition)

You pick the courses or pages you care about (Udemy, Coursera, premium dashboards, docs, anything).

This setup:

- Watches those pages for you 24/7

- Spots even tiny changes (new lecture, new file, new “Last updated”, new coupon, new freebie)

- Pings you on **Telegram / Discord / Email / Phone**

- Can be:

You set it once → it obsesses on your behalf forever.

No more:

- “Did this course update?”
- “Let me check again…”
- “Why am I on Udemy for the 47th time today?”

* * *

## 🧱 Pick Your Poison

1. **Easy Mode:** Browser extensions & desktop apps (no servers, no Docker, just click & go).
2. **Power Mode:** Self-hosted [changedetection.io](http://changedetection.io) + ntfy + GitHub Actions + automations.
3. **Overkill Mode:** Huginn, RSS-Bridge, Cloudflare Workers, Healthchecks, Monitoror, the whole circus.

You can stop at any level and still have a life upgrade.

* * *

# 🧩 Level 0 — Zero-Setup: Browser Extensions & Desktop Apps

![Tired Merry Go Round GIF](https://onehack.st/uploads/default/original/3X/b/4/b45f73da64885314bb7e1877263b14573d0e5f14.gif)

### 🌐 Distill Web Monitor (Chrome / Firefox / Edge / Opera)

**Link:** [https://chromewebstore.google.com/detail/inlikjemeeknofckkjolnjbpehgadgge](https://chromewebstore.google.com/detail/inlikjemeeknofckkjolnjbpehgadgge)

What it does:

- Runs **inside your browser** , no server needed

- Lets you click on **any part of a page** (like “Last updated”) and monitor just that

- Shows changes with highlights and history

- Alerts via:

Modes:

- **Local monitors:** run while your browser is open (25 monitors on free)
- **Cloud monitors:** run even when your PC is off (5 monitors on free, every ~6 hours)

Perfect for:  
“I just want this course page to scream at me when they update it.”

* * *

### 🧩 [changedetection.io](http://changedetection.io) Browser Extension (Chrome)

**Link:** [https://chromewebstore.google.com/detail/kefcfmgmlhmankjmnbijimhofdjekbop](https://chromewebstore.google.com/detail/kefcfmgmlhmankjmnbijimhofdjekbop)

What it does:

- Adds a big “WATCH THIS WEB PAGE” button in your browser
- Lets you visually select parts of a page and send them straight to your **self-hosted [changedetection.io](http://changedetection.io)** server
- Has a “Restock Detection” mode that only cares about price/availability changes

Note:  
This is **just the remote control**. The actual brain is your [changedetection.io](http://changedetection.io) server (explained later).

* * *

### 🦊 Update Scanner (Firefox)

**Addon:** [https://addons.mozilla.org/en-US/firefox/addon/update-scanner/](https://addons.mozilla.org/en-US/firefox/addon/update-scanner/)  
**GitHub:** [https://github.com/sneakypete81/updatescanner](https://github.com/sneakypete81/updatescanner)

What it does:

- Old-school but rock solid page monitor, all **local** , no cloud
- Can check as often as **every 5 minutes**
- Shows side-by-side diffs with changed text highlighted
- Lets you organize watched pages in folders in a Firefox sidebar

Good for:

- Monitoring a bunch of course pages
- Getting “A webpage has been updated” desktop notifications without any account or server

* * *

### 📝 Check4Change (Firefox)

**Addon:** [https://addons.mozilla.org/en-US/firefox/addon/check4change/](https://addons.mozilla.org/en-US/firefox/addon/check4change/)

How it works:

- Select some text on a page → right-click → set check interval

- Periodically re-checks that exact text

- Alerts via:

Catches:

- Only works on **open tabs**
- Browser restart = jobs gone

Use it as your **“live stalking” mode** for:

- Course launches
- Flash sales
- “I’m watching this exact thing for the next 2 hours.”

* * *

### 👁 Wachete (Chrome / Firefox)

**Extensions:** Chrome Web Store + Firefox Addons

What it does:

- Lets you select **part or whole** of a page
- Runs checks on **Wachete’s servers** , so your PC can be off
- Handles **login-protected** pages (stores your session server-side)
- Sends email alerts + keeps change history & graphs (good for prices, counts, stats)

Trade-off:

- Super convenient “set and forget”
- But your data lives on their servers, not just your machine

* * *

### 🔁 Auto Refresh & Page Monitor (Chrome)

**Link:** [https://chromewebstore.google.com/detail/nagebjgefhenmjbjhjmdifchbnbmjgpa](https://chromewebstore.google.com/detail/nagebjgefhenmjbjhjmdifchbnbmjgpa)

What it does:

- Combines two things:

Good for:

- “Reload this course page every X minutes and tell me if anything changed visually or in source.”

* * *

### 💻 WebSite-Watcher Free (Windows)

**Link:** [https://www.aignes.com/wswfree.htm](https://www.aignes.com/wswfree.htm)

What it does:

- Desktop app for Windows (no signup, no ads)

- Monitors:

- Highlights changes in text

- Allows keyword-based alerts

- Runs fully **offline on your PC** (no data selling nonsense)

- Freeware license allows **commercial use**

Good if you:

- Don’t want browser-based stuff
- Like one central app for all your watched pages

* * *

### 🧠 Hidden Extension Mechanics (Still Easy)

- **Local vs Cloud (Distill):**  
Local = requires browser open, but lots of checks.  
Cloud = browser can be closed, but limited checks on free.

- **Update Scanner Speed:**  
Free, local, checks every 5 minutes = faster than most free cloud tools.

- **Check4Change Limitation:**  
Perfect for “I’m watching this right now today”, useless for long-term unattended stuff.

- **Wachete Login Magic:**  
Because it runs on their servers, it can watch logged-in pages even if your browser is closed.

- **Visual Selection Everywhere:**  
Most of these tools let you **hover & click** to pick the exact element — no need to know what “XPath” means.

* * *

### 🌀 Fun Combos on Easy Mode

- **Distill for daily use + Update Scanner for “serious” pages**
- **Check4Change for tonight’s launch + WebSite-Watcher for long-term tracking**
- **Wachete for login-only course portals + Distill for public stuff**

If you only monitor 5–25 courses/pages and use the browser daily, you can live forever in this level.

* * *

# 🧩 Level 1 — Self-Hosted Stack: The Serious “Never Miss an Update” Rig

Now we upgrade from browser-addons-cute to “I run my own tiny infra” energy.

![cat stalker GIF](https://onehack.st/uploads/default/original/3X/f/8/f88e62302d5a47a292c4e544fe574d53d1af6b66.gif)

* * *

## 🧨 What This Stack Does

- Watches **hundreds** of course pages / APIs / feeds

- Checks as often as **every 1–5 minutes**

- Filters out garbage changes

- Sends alerts to:

- Keeps history, diffs, logs, dashboards

- Can be fully **self-hosted** and under your control

* * *

## 🔧 Core Tools — The Main Crew

### 🕵 [changedetection.io](http://changedetection.io) — The Page Change Sniffer

**GitHub:** [https://github.com/dgtlmoon/changedetection.io](https://github.com/dgtlmoon/changedetection.io)

What it does:

- Self-hosted web UI where you can:

- Supports:

- Ignores:

- Sends:

You point it at Udemy course pages or APIs → it tells you what changed and when.

* * *

### 📣 ntfy — Your Private Push Notification Server

**Site:** [https://ntfy.sh](https://ntfy.sh)  
**GitHub:** [https://github.com/binwiederhier/ntfy](https://github.com/binwiederhier/ntfy)

What it does:

- Lets you subscribe to topics like `/udemy-updates` on your phone
- Anything that POSTs a message to that topic → instant push notification
- Can be self-hosted, or you can use the public instance

Why it’s great:

- No Firebase
- No weird SaaS limits
- Stupid simple HTTP interface (`curl -d "message" ntfy.sh/topic`)

* * *

### 📬 Apprise — One Library to Spam All Your Apps

**PyPI:** `pip install apprise`

What it does:

- One command to send messages to:

Perfect glue between:

- [changedetection.io](http://changedetection.io)
- Python scripts / GitHub Actions
- Your chat apps

* * *

### ⏱ GitHub Actions — Free Cron & Compute

What it does:

- Lets you run scripts on a schedule (cron style):

```yaml
schedule:
  - cron: "*/5 * * * *" # every 5 minutes

```

You can use it to:

- Call Udemy/other platform APIs or JSON endpoints
- Fetch course data regularly
- Compare old vs new snapshots
- Trigger Apprise/ntfy alerts

No server? No problem. GitHub hosts the runner for you.

* * *

### 🤖 n8n Udemy Workflow — No-Code-ish Automation

**Workflow:** [https://n8n.io/workflows/8248](https://n8n.io/workflows/8248)

What it does:

- Pulls free Udemy courses via RapidAPI
- Filters them
- Writes into Google Sheets
- Sends alerts if something fails

Use it as:

- A ready-made blueprint for your own automations (with or without Udemy).

* * *

### 🪤 Udemy\_bot — Auto-Enroller

**GitHub:** [https://github.com/dimakiss/Udemy\_bot](https://github.com/dimakiss/Udemy_bot)

What it does:

- Watches [udemyfreebies.com](http://udemyfreebies.com)

- Auto-enrolls in courses that meet your criteria:

- Uses Chrome WebDriver to do the heavy lifting

Combine it with your monitoring stack to:

- Discover the course
- Auto-enroll
- Get notified it’s done

* * *

## 🧠 Hidden Mechanics — Early-Detection Tricks

### 📡 Feed & Atom Hijacking

- Many platforms still expose hidden feeds (`/releases.atom`, `/feed`, etc.)
- [changedetection.io](http://changedetection.io) can watch those instead of full HTML
- You filter to just the `<title>`/version string

Result:  
Incredibly clean “something changed” without layout noise.

* * *

### 🔔 Browser Push & Service Worker Signals

- Modern sites use Service Workers + Push APIs
- They push update info to the browser in the background
- You can inspect this in DevTools (`navigator.serviceWorker`, `PushManager`)

Idea:  
Understand when the site is synchronized → combine with your monitoring to know when major syncs finished.

* * *

### 🗺 Sitemap “Last-Modified” Spying

- Check `/sitemap.xml` or `/sitemap_index.xml`
- Watch `<lastmod>` tags or `Last-Modified` headers

Platforms often update these **before** the page itself.  
So you get a 12–48 hour head start by watching the sitemap.

* * *

### ⚡ WebSub / PubSubHubbub

- Protocol where feeds **push** update events to subscribers
- Used heavily in blog platforms & WordPress

You:

- Subscribe to their hub
- Receive webhooks when feed changes

No constant polling. Just pings when there’s actual news.

* * *

### 🕶 Playwright / Puppeteer For JS-Heavy Pages

Some course platforms render key info via JavaScript. Normal scrapers see nothing.  
Playwright / Puppeteer:

- Load page like a real user
- Wait for content
- Grab final HTML or screenshot
- You then compare over time

Great for dashboards, SPA-based course platforms, anything “too modern” for basic scraping.

* * *

### 📦 udemyscraper

**PyPI:** [https://pypi.org/project/udemyscraper/](https://pypi.org/project/udemyscraper/)

What it can fetch:

- Course title, tagline, description
- Requirements, audience
- Banners
- Pricing info

Run it on a schedule → save snapshots → diff → alert on changes.

* * *

### 🧵 Unofficial Udemy APIs

DevTools → Network tab while browsing Udemy reveals endpoints like:

- `/api-2.0/courses/{pk}/`
- `/completion/v1/subsection-completion/{username}/{course_key}`

These can show:

- Updated timestamps
- Section count
- Completion info

You’re not hacking anything; you’re just reading the same data your browser already reads.

* * *

### 👤 Instructor Social Monitoring

Track instructors on:

- X / Twitter
- LinkedIn
- Blogs / Medium

Use:

- Hootsuite / Tailwind / Metricool / any social monitor

They often announce “Big update shipped” earlier than the platform’s own UI or emails.  
Your stack can then double-check the course and alert you.

* * *

### 🧹 Killing False Positives

Use tools like Visualping / Distill / [changedetection.io](http://changedetection.io) selector filters to:

- Ignore cookie banners
- Ignore random counters
- Watch only the real content area (like course curriculum, last updated, price, etc.)

Result:  
Notifications that actually matter.

* * *

## ⚠ Real-World Truths

- Course platforms / LMS integrations often sync **only a few times per day**

- Free SaaS monitoring tools have:

But:

- Self-hosted = your rules, your frequency
- GitHub Actions / Cloudflare Workers = free compute and cron
- Extensions & desktop apps = instant “no setup” wins

You get to mix all three worlds however you like.

* * *

## 🧩 Combos in the Self-Hosted World

### 🧱 Combo 1: Fully Self-Hosted Radar

- [changedetection.io](http://changedetection.io) in Docker

- ntfy self-hosted for notifications

- GitHub Actions or a local cron script to orchestrate checks & comparisons

- Optional:

Result:  
A “course & content update radar” that keeps itself alive and up-to-date.

* * *

### 🪢 Combo 2: Hybrid Lazy Mode

- Distill / Update Scanner for “stuff I’m currently actively watching”

- [changedetection.io](http://changedetection.io) for “big list of things I want monitored forever”

- Notifications via:

You get instant local feedback + deep background coverage.

* * *

### 🛰 Combo 3: Proxies & Scrapers

- Use Apify, Cloudflare Workers, or rotating IPs from CI
- Scrape APIs/pages politely but without constant rate-limit headaches
- Plug into [changedetection.io](http://changedetection.io) or custom scripts to detect deltas

* * *

### ✂ Combo 4: Delta-Only Notifications

Configure [changedetection.io](http://changedetection.io) to send:

- Only the **diff** (what changed)
- Not full HTML

This keeps your Discord/Telegram/ntfy messages short and readable.

* * *

# 🧨 Level 2 — Overkill Mode: Full Goblin Automation

Once you’re comfortable with basic monitoring, here’s where it gets fun and mildly ridiculous.

![Office Rubbing GIF by Azeron](https://onehack.st/uploads/default/original/3X/d/4/d48645e365743efc8937e99339424ead50136e0c.gif)

* * *

## 🧬 Huginn — Your Automation Brain

**GitHub:** [https://github.com/huginn/huginn](https://github.com/huginn/huginn)

What it does:

- Self-hosted “build your own IFTTT / Zapier”

- You create agents that:

Example:

> If Udemy course X updates AND  
> change size \> 500 characters AND  
> instructor also tweeted about it →  
> send high-priority Gotify notification + log to Notion + tag in Discord.

* * *

## 📡 RSS-Bridge — Giving Dead Sites an RSS Soul

**GitHub:** [https://github.com/RSS-Bridge/rss-bridge](https://github.com/RSS-Bridge/rss-bridge)  
**Public instance:** [https://rss-bridge.org/bridge01/](https://rss-bridge.org/bridge01/)

What it does:

- Turns social networks & normal sites into RSS/Atom feeds:

Also has **XPathBridge** to build a feed from any HTML page using basic selectors.

Once it’s a feed → all your existing monitoring tools can consume it.

* * *

## 📲 Gotify — Another Push Server Option

**GitHub:** [https://github.com/gotify](https://github.com/gotify)

What it offers:

- App tokens
- Priorities
- Markdown messages
- Attachments

Good if you want more structured, multi-app push handling than ntfy.

* * *

## 📜 Dozzle — Live Logs in a Browser

**GitHub:** [https://github.com/amir20/dozzle](https://github.com/amir20/dozzle)

Use it to:

- Watch logs from [changedetection.io](http://changedetection.io), Huginn, ntfy, scrapers in real-time
- See instantly when something breaks or misbehaves
- Filter/search logs from all containers

* * *

## 🔍 Diffsitter — “What Actually Changed in This Code?”

**GitHub:** [https://github.com/afnanenayet/diffsitter](https://github.com/afnanenayet/diffsitter)

Use it for:

- Course repos or code samples
- Viewing **semantic** diffs, not just “line changed”
- Filtering out nonsense (whitespace, small style tweaks)

Perfect if you follow programming courses and want to know what logic changed between version 1 and version 2.

* * *

## 📺 Monitoror — Big Wall of Status

**Site:** [https://monitoror.com](https://monitoror.com)

Use it as:

- A single-screen dashboard with tiles like:

Hang it on a TV and pretend you run a tiny mission control.

* * *

## ❤ [Healthchecks.io](http://Healthchecks.io) — Is Your Monitoring Alive?

**Site:** [https://healthchecks.io](https://healthchecks.io)

Use it to:

- Get notified when:

Everything pings Healthchecks on success.  
If Healthchecks doesn’t hear from it → it screams.

* * *

## ☁ Cloudflare Workers + Cron Triggers

**Intro blog:** [https://blog.cloudflare.com/introducing-cron-triggers-for-cloudflare-workers/](https://blog.cloudflare.com/introducing-cron-triggers-for-cloudflare-workers/)

Use them to:

- Run scheduled scraping/comparison code **on the edge**
- Store state in KV / Durable Objects
- Trigger ntfy / Gotify / Discord webhooks on change

All serverless. All free-ish.

* * *

## 🧵 Extra Nerdy Mechanics (Still Useful)

- **Teachable / Thinkific / Wagtail:**

- **Service Worker stalking:**

- **Cloudflare Workers as proxy:**

- **RSS-Bridge + JSON feeds:**

* * *

## 🌀 Ridiculous But Beautiful Architectures

### 🧱 Multi-Layer Monitoring Pyramid

1. **Base:**

2. **Middle:**

3. **Top:**

4. **Safety Net:**

You get alerts only when **actual meaningful changes** happen.

* * *

### 🌍 Edge Scraper with Cloudflare Workers

- Worker fetches course JSON

- Compares new vs old in KV storage

- If changed:

- Runs in multiple regions, low latency, no box to maintain

* * *

### 🧬 Self-Healing Stack

- Everything in Docker Compose:

- Watchtower auto-updates containers

- Healthchecks monitors cron/GitHub jobs

- Docker restart policies keep stuff alive

Result:  
Monitoring that refuses to die.

* * *

### Ugh… Great. Now Even Udemy Deals Want To Pay My Bills — What’s Next?! (ಠ෴ಠ)

![Cute Girl Omg GIF](https://onehack.st/uploads/default/original/3X/1/3/13e1200ce135f9bb4c64283bb5501c11446ea243.gif)

1. **The “Deal Hunter Middleman” Flip**

> **💡Example:** A student runs a “Best Udemy Deals Daily” WhatsApp group with 2,000 members.  
> Makes ₹15k–₹30k/month from affiliate commissions alone.

* * *

1. **The “Update Recap Newsletter” Flip**

> **💡Example:** A niche AI newsletter charges $5/month for “course update intelligence.”  
> 600 subscribers = **₹2.5 lakh/month**.

* * *

1. **The “Free Courses Farming Machine” Flip**

> **💡Example:** One Telegram channel earns $400/month just selling “Premium Free Course Packs.”

* * *

1. **The “Silent SaaS Template Seller” Flip**

> **💡Example:** Templates like this easily sell 200–500 copies at ₹499 each.  
> People love “simple automation kits” they can drag-and-drop.

* * *

> ## Sooo…?
> 
> It’s basically turning “course stalking” into a money-printing side-quest where your bots do the watching, and you do the cashing.

* * *

## 🧵 Final Reality Check

You’re not “just scraping Udemy”.

You’re building:

- A **course-update radar**
- A **coupon & freebie radar**
- A **content-change radar** for literally any website you care about

You can:

- Stay at **Extension Level** and already stop refreshing pages like a maniac
- Move to **Self-Hosted Level** and watch dozens or hundreds of things at once
- Go to **Overkill Level** and basically run your own mini intelligence system

Set it up once.  
Let the system obsess.  
Your only job: act when your phone buzzes and says,

> “Hey, your course just got an update. Go eat.”