Adaptive mastery across 182 domains. Kairos uses SM-2 spaced repetition and 17 purpose-built AI agents to surface the right question at the right moment — the literal meaning of the word. No account required. No credit card. No streak anxiety.
Kairos tracks each question independently — ease factor, interval, repetition count. It resurfaces what you're about to forget, not what you last studied. The algorithm is the same one used in Anki; the curation and AI layer are ours.
Not a chatbot you ask questions to — a set of narrow agents each built for one task: explaining a concept you got wrong, generating a flashcard set, planning tomorrow's study session, surfacing related knowledge from a different hub. Agents that act, not agents that chat.
Finance, law, medicine, science, history, languages, strategy, sport — and everything between. Every hub is a contained domain with calibrated questions, textbook-mode lessons, and a dedicated AI agent. You can study one hub or build a multi-domain knowledge graph.
No trial period. No credit card. The free tier is the full product — all 182 hubs, SM-2, basic AI. Pro and Scholar unlock the deeper layer.
Kairos is not an AEQUARA product tier. It's a standalone app built by the same people — carrying the same no-dark-patterns discipline, the same Brier-calibration philosophy, the same belief that learning compounds when it's honest. AEQUARA builds instruments for professionals. Kairos builds the same quality of thinking for anyone who wants it.
The Scholar tier's Brier-calibrated difficulty scoring is the one formal bridge: Scholars develop the same calibration instinct that AEQUARA's professional instruments require. That's not a marketing claim — it's the same scoring function.
No account required · No credit card · No streak pressure