Price (USD)
XMAX Starry 4 edgeHydrology9
$199
XMAX Starry 4
$99
XMAX Starry 4 is typically around $100 lower.
Vaporizer Comparison
Hydrology9 vs XMAX Starry 4
Hydrology9
VS
XMAX Starry 4
Side-by-side specs, pricing context, and clear decision guidance.
Editorial Summary
Hydrology9 and XMAX Starry 4 are both conduction / electronic vaporizers, but they target different priorities. XMAX Starry 4 is usually the lower-cost pick at $99, around $100 below Hydrology9. XMAX Starry 4 has the quicker listed heat-up profile, which can matter for shorter sessions.
Specs Compared
20
Different Specs
19
Shared Specs
1
Overall Overlap
5%
Shared Traits
Conduction Electronic
Head-to-Head Highlights
A quick snapshot of the specs people usually care about first.
Heat-Up Time
XMAX Starry 4 edgeHydrology9
~1 minute
XMAX Starry 4
~15 seconds
XMAX Starry 4 has the quicker listed heat-up profile.
Heating Style
Close callHydrology9
Conduction
XMAX Starry 4
Conduction
Both devices use a similar heating approach.
Key Differences at a Glance
Top specs where these two devices diverge.
Price (USD)
Hydrology9
$199
vs
XMAX Starry 4
$99
Device Type
Hydrology9
Portable
vs
XMAX Starry 4
—
Heat Up Time
Hydrology9
~1 minute
vs
XMAX Starry 4
~15 seconds
Temperature Range
Hydrology9
250°F-430°F
vs
XMAX Starry 4
100℃-240℃ (212℉-464℉)
Battery Type
Hydrology9
—
vs
XMAX Starry 4
18650
Battery Capacity
Hydrology9
2000mAh
vs
XMAX Starry 4
2550mAh
Charging
Hydrology9
—
vs
XMAX Starry 4
USB-C
Charge Time
Hydrology9
~2 hours
vs
XMAX Starry 4
—
Pass-Through Charging
Hydrology9
—
vs
XMAX Starry 4
Yes
Dimensions
Hydrology9
~4.5 x ~17.5cm
vs
XMAX Starry 4
115.9 x 37.5 x 24mm
Choose Hydrology9 if...
- Your usage leans toward desktop sessions.
- You prefer Hydrology9's overall feature mix and form factor.
- You prefer Hydrology9's overall feature mix and form factor.
Choose XMAX Starry 4 if...
- You want the lower listed entry price ($99 vs $199).
- You care about faster heat-up time for quicker sessions.
- Your usage leans toward portable and budget sessions.
Spec Comparison Table
Direct comparison of every spec from each device profile.
19 differ 1 shared
| Specification | Hydrology9 | XMAX Starry 4 |
|---|---|---|
| Price (USD) | $199 | $99 |
| Device Type | Portable | — |
| Heating Type | Conduction | Conduction |
| Heat Up Time | ~1 minute | ~15 seconds |
| Temperature Range | 250°F-430°F | 100℃-240℃ (212℉-464℉) |
| Battery Type | — | 18650 |
| Battery Capacity | 2000mAh | 2550mAh |
| Charging | — | USB-C |
| Charge Time | ~2 hours | — |
| Pass-Through Charging | — | Yes |
| Dimensions | ~4.5 x ~17.5cm | 115.9 x 37.5 x 24mm |
| Power Adjustment | Modular - 5 stage | — |
| Brand | Cloudious9 | — |
| Chamber Material | — | Ceramic |
| Chamber Size | ~0.5 grams | — |
| Cooling | Liquid | — |
| Display Type | — | OLED |
| Haptic Feedback | — | Yes |
| Manufacturer | — | TopGreen Technology Co |
| Replaceable Battery | — | Yes |
Comparison FAQs
What is the biggest difference between the Hydrology9 and the XMAX Starry 4?
The biggest practical difference is price tier: the XMAX Starry 4 sits at $99 while the Hydrology9 is $199, a gap of about $100 that puts them in different buying brackets.
Which is cheaper, the Hydrology9 or the XMAX Starry 4?
XMAX Starry 4 is the cheaper option at $99 compared with $199 for the Hydrology9, about $100 less. Live retailer pricing can shift, so confirm before buying.
Which heats up faster, the Hydrology9 or the XMAX Starry 4?
XMAX Starry 4 reaches session-ready temperature in ~15 seconds, while the Hydrology9 takes ~1 minute. That's roughly 45 seconds quicker on the XMAX Starry 4, which is useful if you want shorter, on-demand sessions.
Can I use the XMAX Starry 4 while charging?
Yes, only the XMAX Starry 4 supports pass-through charging. The Hydrology9 has to finish charging before you can use it.
Which is more discreet, the Hydrology9 or the XMAX Starry 4?
XMAX Starry 4 is the better pick if low-profile use matters. It's tagged as stealth or pocket-friendly in our database, while the Hydrology9 is more conspicuous in hand and harder to keep out of sight.
Need a different matchup?
Jump into the comparison hub to pick any two devices and open a canonical side-by-side page.