COMIDOC
CouponsFreeTopics
COMIDOC
CouponsVerified CouponsFreeFree CoursesTopicsTopics
React
AdvertiseSubmit Course

About

Udemy coupons monitored continuously.

Verified offers, course alerts, precise filters, and browser detection built for learners who want coupons that still work.

TelegramTwitterFacebookRSS

Browser tools

Find coupons directly on Udemy.

The extension surfaces an available Comidoc coupon while you browse a Udemy course page.

ChromeFirefoxEdge

Useful links

Discover

  • Blog
  • Daily Freebies
  • Most Wanted Coupons
  • Top Contributors
  • Udemy Sale Calendar

Services

  • Pricing
  • Advertise Here
  • Developer API
  • Submit Coupon

Comidoc

  • About
  • Contact
  • Data License
  • Privacy
  • Terms

© 2017–2026 Comidoc

v6.6.9

Independent coupon discovery for Udemy learners

John Martin

John Martin

Online Course Instructor

3.86 average course rating (36 course reviews)

Statistics

534
total students
70 hours
total content
Dec 2021
first content date
Feb 2023
last content date

Courses (8)

📚 Other Courses (8)

Learn Sedimentology from the Scratch
Instructor John Martin
John Martin
8 courses
English
Learn Sedimentology from the Scratch

Learn Sedimentology from the Scratch

(4.23 with 13 reviews)
225
students
20 hours
content
Dec 2021
updated
$14.99
Learn Hydrology from the Scratch
Instructor John Martin
John Martin
8 courses
English
Learn Hydrology from the Scratch

Learn Hydrology from the Scratch

(3.71 with 7 reviews)
67
students
5.8 hours
content
Dec 2021
updated
$14.99
Learn Soil science from the Scratch
Instructor John Martin
John Martin
8 courses
English
Learn Soil science from the Scratch

Learn Soil science from the Scratch

13
students
1.6 hours
content
Dec 2022
updated
$14.99
Learn Climatology from the Scratch
Instructor John Martin
John Martin
8 courses
English
Learn Climatology  from the Scratch

Learn Climatology from the Scratch

(3.50 with 1 reviews)
33
students
8.0 hours
content
Jun 2022
updated
$14.99
Electric Flux- Basics to Advanced level
Instructor John Martin
John Martin
8 courses
English
Electric Flux- Basics to Advanced level

Electric Flux- Basics to Advanced level

--
students
56 minutes
content
Feb 2023
updated
$14.99
Geomorphology Fundamentals
Instructor John Martin
John Martin
8 courses
English
Geomorphology Fundamentals

Geomorphology Fundamentals

(3.10 with 5 reviews)
63
students
19 hours
content
Feb 2025
updated
$14.99
Simple Harmonic Motion and Oscillations
Instructor John Martin
John Martin
8 courses
English
Simple Harmonic Motion and Oscillations

Simple Harmonic Motion and Oscillations

(5.00 with 1 reviews)
8
students
42 minutes
content
Jul 2022
updated
$14.99
Learn Oceanography from the Scratch
Instructor John Martin
John Martin
8 courses
English
Learn Oceanography from the Scratch

Learn Oceanography from the Scratch

(3.61 with 9 reviews)
125
students
14 hours
content
Jun 2022
updated
$14.99