Celestial believes the tech era calls for human-centered products. We build education and entertainment suited to our time — to help people grow and to spark joy. We respect every team member and care for every user. We earn wealth the right way, embrace harmony in diversity, and believe good is only real when it's good for everyone.
With this in mind, our first education product is SQL Hero — a mobile app where you learn SQL by doing.
No fluff, no rote memorization, no AI hype.
You play levels, write real queries, and actually learn.
Every dollar goes directly to development. Updated manually — no tracking. Prices shown in your selected currency (base: CA$).
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We're building something different.
"Celestial believes humans are not GPUs. We build things that let humans rest easy."
Learn SQL by Doing — level-based SQL learning app, already live
Learn SQL by Doing
Pick a tier. Every tier includes all perks from lower tiers. Prices shown in your selected currency (base: CA$).
You decide. Cast your vote — it shapes our roadmap.
Questions? We've got answers.
Games are the second major category in our product line. Here are our design principles.