Substruct

Substruct is an independent software studio based in Maryland that creates focused apps for iPhone and Apple Watch. Its products are designed to solve specific everyday problems without becoming sprawling platforms, and the studio emphasizes calm, clear experiences that respect users’ attention. Substruct also prioritizes privacy: it says its apps have no ads, do not sell data, and avoid surveillance, keeping personal information private whenever the product allows.

Its app portfolio includes Dog Thunder, which provides local early warnings when storms are likely to help dog owners prepare for thunder anxiety, and Migraine Weather, which tracks pressure, temperature, and humidity to help weather-sensitive people plan around potential migraine risks. Other offerings include Migraine Logger, a quick private migraine diary for children, teens, parents, and adults; LYD — Love You, Daily, for gentle relationship check-ins; and Simple Push-up Tracker, which supports a daily exercise habit with logging and rest days. Classic Repeater plays mechanical time chimes on Apple Watch and iPhone, while Night Light offers a gentle alternative to a flashlight.