Clint Tustison
I make these iPhone apps and the websites that go with them. This site has the support and privacy pages for each one.
10 Minute Math
Math fact practice for kids in ten-minute sessions. It brings back the facts a child misses until they turn green on a mastery grid. Each child gets a separate profile.
Daily Chengyu
One Chinese idiom a day, with pinyin, the meaning, a breakdown of each character and the story it comes from.
Noisy Neighbor
Keeps a dated record of neighbor noise. It estimates sound levels with the microphone, picks up bass and vibration with the motion sensor, looks up local quiet-hours rules in U.S. cities, and exports a PDF report or complaint letter.
PSMF Diet
A tracker for the protein sparing modified fast. It works out a daily protein target from your lean body mass, logs meals, weight and water, and schedules refeed days.
Questions about any of them: see the support page.