Science & Tech · Gadgets & EVs · 5 hrs ago
Tech writer 3D-prints an adapter to wear Fitbit Air on his bicep
A tech writer made a 3D-printed adapter for Fitbit Air so he could wear the tracker in a Whoop band.
The setup lets him wear the Fitbit Air on his bicep instead of his wrist, where he prefers to wear a traditional watch.
He turned to the longer, more expandable Whoop band because Fitbit does not offer an official bicep strap for its tracker.
He printed the adapter in PLA plastic and says it has not broken or come off.
Moving the tracker to his bicep brought only a small improvement in heart-rate tracking.
The trade-off is that bicep wear can reduce step-count accuracy, and the writer says step tracking on screenless trackers can already be unreliable.
A tech writer 3D-printed an adapter to wear a Google Fitbit Air fitness tracker on his bicep using a Whoop band.
The adapter lets the Fitbit Air sit inside the Whoop band as a housing.
He printed the adapter from PLA plastic and said it had not come off or broken.
He prefers wearing a traditional watch on his wrist and uses the Fitbit Air for weight training.
He noticed only a small improvement in heart-rate tracking when wearing the tracker on his bicep.
- Who
- Khumail, a tech writer.
- What
- He 3D-printed an adapter to wear a Fitbit Air on his bicep using a Whoop band.
- When
- The article was published on Nov. 1, 2026; the writer says he made the adapter recently.
- Where
- Not stated
- Why
- The writer prefers wearing a traditional watch on his wrist, and the Fitbit Air has no official bicep strap listed in the article.
This story does not have two clearly opposing sides.
Khumail switched from a Whoop band to the Google Fitbit Air.
After finding a Fitbit Air-to-Whoop 4.0 adapter design, Khumail 3D-printed an adapter to wear the Fitbit Air on his bicep.
- Adapter
- Connects the Google Fitbit Air to a Whoop band
- Material
- PLA plastic
- Tracker position
- Bicep
- Fitbit Air strap availability
- The article says the official store does not offer a dedicated bicep strap for the Fitbit Air
- Publication date
- Nov. 1, 2026
What people are saying
I also prefer to wear a traditional watch on my wrist rather than a band, so I 3D printed an adapter that lets me use the Whoop band as a housing for the Google Fitbit Air.
I used PLA plastic to 3D print the adapter, and it hasn't come off or broken yet.
Folks on Reddit argue that Whoop tracks heart rate better on a bicep than on the wrist, but with the Fitbit Air on the bicep, I noticed only a small improvement in heart rate tracking.