Price (USD)
G Pen Pro edgeG Pen Pro
$90
IO Hornet
$260
G Pen Pro is typically around $170 lower.
Vaporizer Comparison
G Pen Pro vs IO Hornet
Side-by-side specs, pricing context, and clear decision guidance.
G Pen Pro
Grenco Science $90
VS
IO Hornet
IO MFG $260
Editorial Summary
G Pen Pro and IO Hornet are both convection / electronic vaporizers, but they target different priorities. G Pen Pro is usually the lower-cost pick at $90, around $170 below IO Hornet. G Pen Pro has the quicker listed heat-up profile, which can matter for shorter sessions.
Specs Compared
22
Different Specs
22
Shared Specs
0
Overall Overlap
0%
Shared Traits
Convection 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
IO Hornet
3-5 minutes on a 16mm coil, longer on 20mm and 25mm adapters
G Pen Pro has the quicker listed heat-up profile.
Heating Style
Close callG Pen Pro
Convection
IO Hornet
Convection as an injector, hybrid with conduction as a diffuser
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
IO Hornet
$260
Device Type
G Pen Pro
Portable
IO Hornet
Desktop
Heating Type
G Pen Pro
Convection
IO Hornet
Convection as an injector, hybrid with conduction as a diffuser
Heat Up Time
G Pen Pro
~30 seconds
IO Hornet
3-5 minutes on a 16mm coil, longer on 20mm and 25mm adapters
Temperature Range
G Pen Pro
190°C - 220°C (375°F - 428°F)
IO Hornet
271-338°C (520-640°F) recommended by IO MFG
Chamber Capacity
G Pen Pro
~0.25 grams
IO Hornet
0.08g to about 0.2g, around 0.15g for a full draw
Battery Type
G Pen Pro
Internal
IO Hornet
None
Charging
G Pen Pro
Micro-USB
IO Hornet
None
Power Adjustment
G Pen Pro
Modular - 3 Stages
IO Hornet
Set on a separate PID controller, included only in the Complete Kit
Chamber Material
G Pen Pro
Ceramic
IO Hornet
316L stainless steel with a Bocote wood handle
Choose G Pen Pro if...
- You want the lower listed entry price ($90 vs $260).
- 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 IO Hornet if...
- You prefer a convection as an injector, hybrid with conduction as a diffuser heating profile.
- Your usage leans toward desktop and ball vape sessions.
- You prefer IO Hornet's overall feature mix and form factor.
Spec Comparison Table
Direct comparison of every spec from each device profile.
22 differ 0 shared
| Specification | G Pen Pro | IO Hornet |
|---|---|---|
| Price (USD) | $90 | $260 |
| Device Type | Portable | Desktop |
| Heating Type | Convection | Convection as an injector, hybrid with conduction as a diffuser |
| Heat Up Time | ~30 seconds | 3-5 minutes on a 16mm coil, longer on 20mm and 25mm adapters |
| Temperature Range | 190°C - 220°C (375°F - 428°F) | 271-338°C (520-640°F) recommended by IO MFG |
| Chamber Capacity | ~0.25 grams | 0.08g to about 0.2g, around 0.15g for a full draw |
| Battery Type | Internal | None |
| Battery Capacity | 2200mAh | — |
| Charging | Micro-USB | None |
| Charge Time | <3 hours | — |
| Power Adjustment | Modular - 3 Stages | Set on a separate PID controller, included only in the Complete Kit |
| Chamber Material | Ceramic | 316L stainless steel with a Bocote wood handle |
| Concentrate Support | — | Suited to traditional hash, not built for wax or oil |
| Brand | Grenco Science | IO MFG |
| Ball Type | — | 100 x 2.5mm lab grown ruby balls |
| Bowl Compatibility | — | Classic DynaVap tips, IO conduction and glass bowls, many third party 14mm bowls |
| Coil Size | — | 16mm, with adapters for 20mm and 25mm coils |
| Joint Size | — | 14mm bowls included, 10mm and 14mm diffusers, 14mm and 22mm injectors |
| Manufacturer | — | IO MFG LLC |
| Release Date | 2017 | 2024 |
| Session Style | Session | On-Demand |
| Warranty | 1 year | None, IO MFG sells the Hornet as is with no express or implied warranty |
Comparison FAQs
What is the biggest difference between the G Pen Pro and the IO Hornet?
The biggest practical difference is price tier: the G Pen Pro sits at $90 while the IO Hornet is $260, a gap of about $170 that puts them in different buying brackets.
Which is cheaper, the G Pen Pro or the IO Hornet?
G Pen Pro is the cheaper option at $90 compared with $260 for the IO Hornet, about $170 less. Live retailer pricing can shift, so confirm before buying.
Which heats up faster, the G Pen Pro or the IO Hornet?
G Pen Pro reaches session-ready temperature in ~30 seconds, while the IO Hornet takes 3-5 minutes on a 16mm coil, longer on 20mm and 25mm adapters. That's roughly 210 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 IO Hornet?
G Pen Pro uses convection heating, while the IO Hornet uses convection as an injector, hybrid with conduction as a diffuser. Heating style influences flavor profile, vapor density, and how forgiving the device is to draw technique.
Does the G Pen Pro or the IO Hornet hold more flower?
G Pen Pro has the larger chamber at ~0.25 grams, versus 0.08g to about 0.2g, around 0.15g for a full draw on the IO Hornet. A bigger bowl means fewer reloads on long sessions; a smaller one suits microdosing and quicker bowls.
Is the G Pen Pro or the IO Hornet better for home versus on-the-go use?
G Pen Pro is the take-anywhere choice. It's a portable, battery-powered unit, while the IO Hornet is built for home use, where bigger heaters, AC power, and larger chambers make sense.
Can I set custom temperatures on the G Pen Pro or the IO Hornet?
G Pen Pro controls heat with modular - 3 stages, while the IO Hornet uses set on a separate pid controller, included only in the complete kit. Both let you change temperature, just with different levels of precision.
Need a different matchup?
Jump into the comparison hub to pick any two devices and open a canonical side-by-side page.