Grenco Science G Pen Pro Herbal Vaporizer Pen Review

If you are looking for a portable and discreet way to enjoy your dry herbs, you might want to check out the Grenco Science G Pen Pro Herbal Vaporizer Pen. This device is a sleek and compact vaporizer that offers three temperature settings, a ceramic heating chamber, and a fast heat-up time. In this review, we will take a closer look at the features, performance, and pros and cons of the G Pen Pro.


The G Pen Pro is a simple and easy-to-use vaporizer that has a single button and three LED lights to indicate the temperature level. The device has a micro-USB port at the bottom for charging, and a removable mouthpiece that covers the ceramic heating chamber. The chamber can hold up to 0.25 grams of finely ground dry herb, and it heats up in about 30 seconds. The device has an automatic shut-off feature that turns it off after four minutes of inactivity.

The G Pen Pro has three temperature settings that you can cycle through by pressing and holding the button. The settings are:

  • Blue – 375°F
  • Green – 400°F
  • Red – 428°F

The device also has a battery indicator that shows the remaining charge by flashing the LED lights when you turn it on or off. The battery life is about 45 minutes of continuous use, and it takes about two hours to fully charge.


The G Pen Pro delivers decent vapor quality for its price range, but it is not comparable to more expensive or advanced vaporizers. The flavor is good at the lowest setting, but it diminishes quickly as you increase the temperature. The vapor is also warm and harsh, especially at the highest setting. The vapor production is average, and you can get some visible clouds if you draw slowly and steadily.

The G Pen Pro is best suited for beginners or casual users who want a simple and discreet way to vape their herbs. It is not ideal for connoisseurs or heavy users who prefer more control, efficiency, or smoothness from their vaporizer. The device is also not very durable or reliable, as some users have reported issues with the battery, the mouthpiece, or the heating chamber.

Pros and Cons

Here are some of the pros and cons of the G Pen Pro:

Pros Cons
– Sleek and compact design – Plastic mouthpiece
– Easy to use and clean – Warm and harsh vapor
– Fast heat-up time – Limited temperature options
– Affordable price – Low battery life
– Discreet and portable – Questionable durability


The G Pen Pro is a decent entry-level vaporizer that offers a simple and discreet way to enjoy your dry herbs. It has a sleek and compact design, a ceramic heating chamber, and three temperature settings. However, it also has some drawbacks, such as a plastic mouthpiece, a warm and harsh vapor, a limited temperature range, a low battery life, and a questionable durability. If you are looking for a more advanced or reliable vaporizer, you might want to look elsewhere.

Sources of images: Grenco Science website, TVape Blog USA, Medical Jane, CBD Manual, VaporPlants