Google Invites Anyone to Build Accessories for the Fitbit Air

On June 2, 2026, Google did something almost no major consumer electronics company does: it publicly released the official hardware specifications and accessory design guidelines for its newest wearable, the $99.99 Fitbit Air. The three-page PDF includes detailed 2D CAD drawings of the tracker’s “capsule” body and the sleeve that mates with the Performance Loop band, explicitly marking key dimensions like the 33.5 mm length of the screenless module . This move invites independent designers, hobbyists, and accessory brands to create custom bands and accessories with exact engineering precision, with qualifying products eligible for a “Made for Google” certification badge .

Inside the Fitbit Air: A Screenless Pebble for $99

The Fitbit Air itself is a deliberate departure from the smartwatch norm. Announced on May 7, 2026, and available on May 26, it has no screen, no buttons, and requires no subscription — a Whoop-like approach at a fraction of the cost . The device is a pill-shaped pebble module weighing just 5.2 grams that snaps into interchangeable wristbands. The complete wearable, with a textile Performance Loop band, weighs 12 grams .

Despite its minimalist form, the sensor suite is comprehensive. It supports 24/7 heart rate monitoring, heart rhythm monitoring with irregular rhythm notifications (including Afib alerts), SpO2 blood oxygen tracking, resting heart rate, heart rate variability (HRV), skin temperature variation, sleep stages, and automatic activity tracking . The device pairs with the new Google Health app, which replaced the Fitbit app on May 19, 2026, and works on both Android 11+ and iOS 16.4+ . Battery life is rated for up to seven days .

Color options include Obsidian, Lavender, and Berry, while the Stephen Curry Special Edition arrives at $129.99 .

Maker Community Already in Motion

Google acknowledged that even before the blueprint release, the “community has already come up with innovative and creative new ideas to make the Fitbit Air [their] own” — for instance, owners quickly found their own bicep band solutions . The official CAD release gives those early experiments a firm engineering foundation, enabling makers to design and 3D print accessories with confidence that sensors will remain properly exposed and the device will stay securely attached . The design specs even mandate specific attachment forces (10–25 N to insert, 12–45 N to remove) to ensure reliability during intense activity .

Why Open Access Is a Radical Shift in Wearables

Most major wearable brands — Apple, Samsung, Garmin, and even traditional Fitbit lines — treat accessory design as a proprietary, licensed ecosystem. Makers typically have to reverse-engineer mechanical mounts or operate under closed licensing programs with NDAs and fees. Google’s decision to release raw 2D CAD files with precise engineering tolerances for free, less than a month after the product’s launch, is almost unheard of at this scale in consumer wearables .

Observers described the move as “rather Google-y and reminiscent of the company’s earlier days,” echoing the open, hacker-friendly ethos that characterized the Nexus program and the later open-sourcing of PebbleOS . By releasing these blueprints, Google is effectively treating the Fitbit Air less as a closed gadget and more as an open platform — and it’s watching to see what the community builds next.