Casio’s Iconic F-91W Style Gets a Modern Upgrade With the New F-B100W Series
Casio is giving one of its most recognizable digital watch designs a fresh purpose for 2026. The new Casio F-B100W series keeps the slim, retro look that made the F-91W a global favorite, but adds Bluetooth connectivity, step tracking, app-based activity logging, and automatic time adjustment.
The new lineup has appeared through Casio Japan, confirming three models: the F-B100W-1AJF, F-B100W-1BJF, and F-B100W-3AJF. Two versions come in black with small differences in finish, while the third arrives in a muted sage green. All three are priced at ¥8,800, which is roughly around $55, making them more affordable than earlier expectations.
The appeal of the F-B100W is easy to understand. Casio has taken the familiar lightweight shape associated with its classic digital watches and added useful everyday smart features without turning it into a bulky smartwatch. It still looks simple, practical, and understated, but now it can track movement and sync with a phone.
The built-in step counter displays daily step totals directly on the LCD screen. Through Casio’s companion app, users can also view a longer “life log” history, making the watch a simple fitness and activity tracker for people who do not want a full touchscreen wearable.
Step goals can be adjusted from 1,000 to 50,000 steps in 1,000-step increments. The watch also includes a step-reminder alert designed to encourage movement after long periods of inactivity. For quick progress checks, users can view an hourly activity graph without needing to open their phone.
Bluetooth also brings automatic time correction, helping the watch stay accurate with minimal manual adjustment. The F-B100W supports world time for around 300 cities, making it useful for travel, remote work, or anyone who regularly follows different time zones.
Despite the added features, the watch remains compact. The case measures 41.9 x 38.1 x 8.8 mm and weighs just 26 grams. It uses a plastic-glass crystal and a resin strap made partly with biomass plastic, giving the series a slight sustainability angle while keeping the lightweight feel Casio fans expect.
Battery life is rated at about two years, which is impressive compared with many modern connected wearables that need frequent charging. This makes the F-B100W especially appealing for users who want basic smart features without daily battery anxiety.
One detail worth noting is the water resistance rating. Casio describes the watch as water-resistant for everyday use, rather than listing a formal ATM or bar rating. That should be fine for splashes and daily wear, but buyers expecting stronger water resistance may want to keep expectations realistic.
The Casio F-B100W series is scheduled to ship in August 2026, with preorders already available in Japan. For fans of classic digital watches, this could be one of Casio’s most interesting affordable releases in years: a familiar retro design with just enough modern functionality to make it more useful for daily life.
