4theKingdom Apps.
A small, family-run mobile app development studio building thoughtful, useful iOS apps. We make tools we'd want to use ourselves — quietly, carefully, and without collecting your data.
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Alge‑Bingo
An algebra bingo game.
Built by a high school math teacher of 30+ years. Learn to solve equations — from the most basic up through multi-step — while playing bingo. 13 levels. Winner of the 2012 National STEM Video Game Challenge.
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Home Keeper
Home care made simple.
A personal home maintenance assistant that tells you exactly what needs attention — and when. A climate-smart schedule built from your location, with step-by-step tasks across HVAC, plumbing, electrical, and more.
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Catchup
Call the people you love.
The simplest way to stay in touch. Catchup tracks who you've gone the longest without calling and puts them at the top of your list. Set a frequency for each person — one tap and you're calling.