My Apps
Browse all the apps I build.
Practice in your browser — no install
The Android apps above are free on Google Play. Prefer no download, or on a computer or iPhone? Every topic in the apps is also a web page here: 241 practice topics for grades 1 through 12, a fresh problem every time, step-by-step solutions, and no sign-up.
Open browser practiceFocused Practice, One Skill at a Time
Every app here is built around one narrow job. None of them tries to teach all of math at once, because that is how practice turns back into scrolling. Each covers a specific range of skills at the pace a student can actually sustain — number sense and arithmetic in the earlier grades, then fractions and pre-algebra, then algebra, geometry and test preparation. Progress is saved on the device, so a five-minute session picks up where the last one stopped instead of starting from zero.