Unnecessary Inventions created SwingStepper, a robotic swinging arm that holds a smartwatch and moves it to accumulate step counts while the wearer relaxes. The creator presents the working invention on their site.

A new tool improves tide predictions on the Casio G-SHOCK GBX-100 without changing its firmware. In Saint-Malo, France, the watch's original data produced average high- and low-tide timing errors of 29 minutes, with a worst case of two hours and five minutes.

Creator Matthieu Girard found that the watch can calculate tides using 60 harmonic constituents, but the official app supplied only a small four-constituent set for Saint-Malo. He calculated a fuller set from official measurements and transferred it via Bluetooth. Average error against 2025 observations fell to five minutes.