Stair Stepper for Home Gym
- Step Machine
- 350 pounds
- Metal
- 1
- More reviewed than 62%
As an Amazon Associate, ProductDome may earn a commission from qualifying purchases made through links on this page.
How it ranks among the 52 step machines we track
3.9★ across 233 Amazon ratings, Bayesian-smoothed toward the category average.
233 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
100+ bought on Amazon last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 52 step machines we track - how the scorecard works · full step machines data report. Confidence: medium - useful but incomplete evidence.Last refreshed Jul 5, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
A folding vertical climber and stair stepper with spring-based resistance, three height settings and an LCD that tracks time, steps and calories. Wide anti-slip pedals and a phone holder round out the compact frame.
- 3 resistance levels plus 3 height settings
- Extra-wide anti-slip pedals
- Folds down with spring storage compartment
- LCD display with phone holder
Who it's for
Apartment or small-space users wanting low-impact cardio they can step onto without warm-up time. Less suited to anyone needing heavy resistance training rather than cardio.
What buyers say
From Amazon customer reviews.
Several buyers praised the low impact on bad knees, quiet operation and ability to step on without any startup, with a few calling it sturdy once the legs are extended. The recurring complaint is hardware fit: at least two reviewers hit a bolt hole blocked by welding or a screw that stripped during assembly, and one noted the electronic counter only tracks one leg.
Strengths and trade-offs
Drawn from this product's published specifications.
- Low impact on joints per multiple reviewers
- Steps on immediately without powering up
- Folds compact for small living spaces
- Some units arrive with misaligned or stripped bolt holes
- Step and calorie counter reportedly tracks only one foot
Performance notes
Three spring resistance levels combine with three height settings to scale intensity, and the frame folds down with a spring-storage compartment for the extra parts. One reviewer found the LCD counter only registers steps from the left foot, roughly halving the displayed totals.
Specifications
| Brand | Stair |
|---|---|
| Model | JY399 |
| Dimensions & fit | |
| Weight Capacity Maximum | 350 pounds |
| Item Weight | 27.6 pounds |
| Item Dimensions L x W x H | 29.9 × 19.6 × 53.1 inches |
| Construction & materials | |
| Material Type | Metal |
| Color | Black |
| Included components | |
| Included Components | 1*Stair Stepper |
| Warranty & support | |
| Warranty Description | 1 year |
| Other details | |
| Number of Batteries | 1 |
Other Stair step machines
How it compares
This product against the closest alternatives we track in step machines.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| Stair Stepper for Home GymThis product | 3.9 / 5 | 233 | 3.7 / 5 |
| Sunny Health & Fitness Mini Steppers for Exercise at HomeSunny | 4.4 / 5 | 36,075 | 4.4 / 5 |
| SPORTSROYALS Stair StepperSPORTSROYALS | 4.3 / 5 | 6,746 | 4.3 / 5 |
| Niceday Steppers for ExerciseNiceday | 4.4 / 5 | 13,138 | 4.3 / 5 |
| Merach Rocking Steppers for Exercise at HomeMerach | 4.2 / 5 | 288 | 4.1 / 5 |
Similar step machines from other brands
Questions about the Stair JY399
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
Does the JY399 stepper need to be plugged in?
No, reviewers step directly onto the machine without any power-up step.
How much floor space does it save when folded?
The listing claims about 70 percent less storage space folded versus assembled.
Is the built-in step and calorie counter accurate?
One reviewer found it counted only the left foot's steps, cutting the displayed totals roughly in half.