3DFitBud A420S Simple Step Counter Pedometer
- 3D tri-axis sensor
- 1.7 inch large display
- CR2032 battery included, up to 12 months
- 24 grams, 2.4 x 1.6 x 0.4 inches
- No Bluetooth or phone needed
- 18 month warranty
Last refreshed Jul 5, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A basic step counter with a large display, a clip, a lanyard and a battery in the box. It has no app or phone link, so it counts steps and little else.
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ASIN: B07DWCVLT1Model: A420SCategory: Pedometers
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Overview
A walker clips this small pink pedometer to a belt or wears it on the neck lanyard, and it counts steps with a three-axis sensor. The pack includes the battery and a user guide.
The reason to look at it is a plain step counter that needs no smartphone, with a battery that is already in the box. The limitation is that features beyond step counting are not described.
Who it's for
People tracking daily steps by clip or lanyard can use the large display. Anyone wanting fitness tracking data on a phone needs a connected tracker.
Pros and cons
- No phone needed
- Clip and lanyard included
- User guide included
- Step counting only
- No app or data export
- Update support unknown
- Warranty shorter than two years
Performance notes
Sensing movement in all directions helps the unit count steps even when the unit is carried in a pocket or at an angle. Wearing position still affects accuracy, so a consistent spot gives steadier counts.
Specifications
| Brand | 3DFitBud |
|---|---|
| Model | A420S |
| Dimensions & fit | |
| Display Size | 1.7 inches |
| Item weight | 24 grams |
| Item Dimensions L X W X H | 2.4 x 1.6 x 0.4 inches |
| Size | One Size |
| Power & efficiency | |
| Battery Average Life | 12 months |
| Battery Description | CR2032 button-cell battery |
| Construction & materials | |
| Material Type | ABS |
| Color | Pink |
| Compatibility & installation | |
| Compatible Devices | No Bluetooth or Smartphone connections required |
| Included components | |
| Included Components | Pedometer, battery, clip, neck lanyard, user guide |
| Unit Count | 1 Count |
| Warranty & support | |
| Warranty Description | 18 months Manufacturer Warranty |
| Software Update Supported To Date | unknown |
| Other details | |
| Sensor Type | 3D Tri-Axis Sensor |
Closest rivals on specs
Omron HJ-720ITC Pocket Pedometer- Display Size 1.7 vs 1.54 inches (+10%)
Frequently asked questions
How do I set up the 3DFitBud A420S pedometer?
The box includes a CR2032 battery, a clip, a neck lanyard and a user guide. The listing gives no setup steps, so follow the guide.
Does it need a smartphone?
No. The listing says no Bluetooth or smartphone connections are required.
How long does the battery last?
The listing says up to 12 months.
How do I wear it?
With the clip or the neck lanyard.