Columbus Celeritas LLC is a small company based in Spokane, Washington. We publish books and digital planners, and we build software of our own.
Columbus Celeritas LLC runs a small creative business. Our publishing work is produced together with a small team of artists and designers in Puebla, Mexico. Alongside it, we develop software products, including the ScreenGuard app for Android.
Books and digital planners, designed and produced with our team in Puebla, Mexico, and sold to readers in the United States and beyond.
Focused, privacy-respecting apps. Our current product is ScreenGuard, an on-device content guard for Android.
ScreenGuard is an Android app that an adult installs and configures to detect adult content shown on the device screen and block it. All detection runs on the device itself: screenshots are analysed in memory by on-device models, are never saved, and never leave the phone. The app has no accounts, no advertising, and no analytics.
ScreenGuard is free software, released under the GNU General Public License v3.0. Read the ScreenGuard privacy policy.
Email us at alejandro@columbusceleritas.com.