Price (USD)
G Pen Pro edgeG Pen Pro
$90
Hydrology9
$199
G Pen Pro is typically around $109 lower.
Vaporizer Comparison
G Pen Pro vs Hydrology9
Side-by-side specs, pricing context, and clear decision guidance.
G Pen Pro
Grenco Science $90
VS
Hydrology9
Cloudious9 $199
Editorial Summary
G Pen Pro and Hydrology9 are both electronic vaporizers, but they target different priorities. G Pen Pro is usually the lower-cost pick at $90, around $109 below Hydrology9. G Pen Pro has the quicker listed heat-up profile, which can matter for shorter sessions.
Specs Compared
18
Different Specs
12
Shared Specs
6
Overall Overlap
33%
Shared Traits
Electronic
Head-to-Head Highlights
A quick snapshot of the specs people usually care about first.
Heat-Up Time
G Pen Pro edgeG Pen Pro
~30 seconds
Hydrology9
~1 minute
G Pen Pro has the quicker listed heat-up profile.
Heating Style
Close callG Pen Pro
Convection
Hydrology9
Conduction
Heating style differs, which can impact flavor and extraction behavior.
Key Differences at a Glance
Top specs where these two devices diverge.
Price (USD)
G Pen Pro
$90
Hydrology9
$199
Heating Type
G Pen Pro
Convection
Hydrology9
Conduction
Heat Up Time
G Pen Pro
~30 seconds
Hydrology9
~1 minute
Temperature Range
G Pen Pro
190°C - 220°C (375°F - 428°F)
Hydrology9
250°F-430°F
Chamber Capacity
G Pen Pro
~0.25 grams
Hydrology9
~0.5 grams
Battery Capacity
G Pen Pro
2200mAh
Hydrology9
2000mAh
Charge Time
G Pen Pro
<3 hours
Hydrology9
~2 hours
Power Adjustment
G Pen Pro
Modular - 3 Stages
Hydrology9
Modular - 5 stage
Brand
G Pen Pro
Grenco Science
Hydrology9
Cloudious9
Warranty
G Pen Pro
1 year
Hydrology9
2 years
Choose G Pen Pro if...
- You want the lower listed entry price ($90 vs $199).
- You care about faster heat-up time for quicker sessions.
- You prefer a convection heating profile.
- Your usage leans toward portable and budget sessions.
Choose Hydrology9 if...
- You prefer a conduction heating profile.
- Your usage leans toward desktop and conduction sessions.
- You prefer Hydrology9's overall feature mix and form factor.
Spec Comparison Table
Direct comparison of every spec from each device profile.
12 differ 6 shared
| Specification | G Pen Pro | Hydrology9 |
|---|---|---|
| Price (USD) | $90 | $199 |
| Device Type | Portable | Portable |
| Heating Type | Convection | Conduction |
| Heat Up Time | ~30 seconds | ~1 minute |
| Temperature Range | 190°C - 220°C (375°F - 428°F) | 250°F-430°F |
| Chamber Capacity | ~0.25 grams | ~0.5 grams |
| Battery Type | Internal | Internal |
| Battery Capacity | 2200mAh | 2000mAh |
| Charging | Micro-USB | Micro USB |
| Charge Time | <3 hours | ~2 hours |
| Dimensions | — | ~4.5 x ~17.5cm |
| Power Adjustment | Modular - 3 Stages | Modular - 5 stage |
| Chamber Material | Ceramic | Ceramic |
| Brand | Grenco Science | Cloudious9 |
| Release Date | 2017 | 2017 |
| Session Style | Session | Session |
| Warranty | 1 year | 2 years |
| Water Filtration | — | Yes |
Comparison FAQs
What is the biggest difference between the G Pen Pro and the Hydrology9?
The biggest practical difference is price tier: the G Pen Pro sits at $90 while the Hydrology9 is $199, a gap of about $109 that puts them in different buying brackets.
Which is cheaper, the G Pen Pro or the Hydrology9?
G Pen Pro is the cheaper option at $90 compared with $199 for the Hydrology9, about $109 less. Live retailer pricing can shift, so confirm before buying.
Which heats up faster, the G Pen Pro or the Hydrology9?
G Pen Pro reaches session-ready temperature in ~30 seconds, while the Hydrology9 takes ~1 minute. That's roughly 30 seconds quicker on the G Pen Pro, which is useful if you want shorter, on-demand sessions.
What's the difference in heating between the G Pen Pro and the Hydrology9?
G Pen Pro uses convection heating, while the Hydrology9 uses conduction. Heating style influences flavor profile, vapor density, and how forgiving the device is to draw technique.
Does the G Pen Pro or the Hydrology9 hold more flower?
Hydrology9 has the larger chamber at ~0.5 grams, versus ~0.25 grams on the G Pen Pro. A bigger bowl means fewer reloads on long sessions; a smaller one suits microdosing and quicker bowls.
Which charges faster, the G Pen Pro or the Hydrology9?
Hydrology9 fully charges in ~2 hours, ahead of <3 hours on the G Pen Pro.
How similar are the G Pen Pro and the Hydrology9?
Across the 18 specs we line up, they share 6 and differ on 12, an overlap of about 33%. The differences are concentrated in the areas the spec table highlights with a marker.
Need a different matchup?
Jump into the comparison hub to pick any two devices and open a canonical side-by-side page.