BIGGERFIVE KR05 Fitness Tracker
- Fitness Tracker
- Blue
- 0.7 ounces
A lightweight blue tracker with limited published specs, worth confirming feature details on the listing before you buy.
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How it ranks among the 44 fitness trackers we track
4.1★ across 0 Amazon ratings, Bayesian-smoothed toward the category average.
0 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
700+ 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 44 fitness trackers we track - how the scorecard works · full fitness trackers data report. Confidence: limited - limited rating history.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
The BIGGERFIVE KR05 is a fitness tracker sold in blue, notable mainly for how little it weighs at about 0.02 kilograms, roughly 20 grams on the wrist.
Available specs on this listing stop at weight and color, so there is no confirmed detail here on battery life, heart rate sensing, water resistance or app compatibility. Anyone comparing trackers should check the product listing images and description directly for those features before buying.
- About 0.02 kg weight
- Blue colorway
- BIGGERFIVE brand
- KR05 model
Who it's for
Fits shoppers who already know they want a light band in blue and are comfortable confirming feature details elsewhere. Less suited to buyers who need heart rate, GPS or battery specs confirmed before ordering.
Strengths and trade-offs
Drawn from this product's published specifications.
- Very light at about 20 grams
- Blue color option
- No battery life listed
- No sensor or display details confirmed
- No water resistance rating given
Performance notes
With only weight and color published in the available data, there is nothing here to confirm how the KR05 tracks steps, heart rate or sleep, or how long its battery lasts between charges.
Specifications
| Brand | BIGGERFIVE |
|---|---|
| Model | KR05 |
| Color | Blue |
| Item Weight | 0.7 ounces |
Other BIGGERFIVE fitness trackers
How it compares
This product against the closest alternatives we track in fitness trackers.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| BIGGERFIVE KR05 Fitness TrackerThis product | 4.1 / 5 | 0 | 2.7 / 5 |
| XIAOMI BHR07PYGL Fitness TrackerXIAOMI | 4.5 / 5 | 10,520 | 4.4 / 5 |
| Garmin 010-02809-00 Fitness TrackerGarmin | 4.7 / 5 | 1,974 | 4.4 / 5 |
| Fitbit B0B5F9SZW7 Fitness TrackerFitbit | 4.2 / 5 | 24,802 | 4.4 / 5 |
| SAMSUNG SM-R390 Fitness TrackerSamsung | 4.4 / 5 | 5,770 | 4.3 / 5 |
Similar fitness trackers from other brands
Questions about the BIGGERFIVE KR05
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
How much does the KR05 tracker weigh?
About 0.02 kilograms, roughly 20 grams.
What color is it sold in?
Blue.
Does the listing confirm heart rate or GPS features?
No, the available specs cover only weight and color.