A live feedback loop for the way you think out loud. Live voice conversations with AI re-creations of figures from history, scored as you talk on clarity, depth, follow-through, and presence. The conversation is the lesson. The meter is how you see it.

Every character is an AI re-creation grounded in that person's own writings. Not a recording, not a real person.

The Conversation Meter A live meter on screen scores your conversation as you speak. 22 behavioral signals per utterance: depth, follow-up, reciprocity, coherence, constructive challenge, troll detection, and more. Sub-millisecond updates, on the same screen as the avatar. Five zones: Surface Skim, Exploring, Engaged, Deep Dive, Flow State. Asymmetric momentum smoothing means bad turns hurt faster than good turns help. Built on published engagement-scoring methodology (Ghazarian et al., AAAI 2020): per-utterance engagement is reliably measurable and improves automatic metrics' agreement with human quality judgment.

Three-tier Memory Architecture Each character remembers what you talked about and brings up unfinished threads through structured memory and archival storage. Returning users start at tier-appropriate scores.

Two-axis Disclosure System 16 distinct relationship states per character. Global trust tier (guarded, warming, open, vulnerable) intersects per-topic depth (surface, candid, deep, raw). Three-layer gating: turn count, signal strength, and meter score must all align before a tier advances.

The Tapestry A constellation map of every topic you've explored with each figure. The deeper you go, the more the Tapestry reveals.

Mind Levels & Arc Score Mind Levels move with your average score across all conversations: Novice, Curious, Thinker, Scholar, Intellectual, Sage. Progression rewards depth, not session count, grounded in Self-Determination Theory (Deci and Ryan). Arc Score is the per-session number, calculated from four factors: Conversational Arc, Depth of Exchange, Engagement Quality, Vocabulary Richness. Relationship depth advances per figure: Acquaintance, Familiar, Conversant.

The Conversation Guide An in-app explainer for everything the meter measures. Nothing about the scoring system is hidden.

Custom Intelligence Layer Per Character Hand-built character by character, refined across hundreds of calibration runs. Aurelius does not sound like Curie. 150+ vocabulary terms per character. Each anchored in their own primary sources: Einstein from his 1905 relativity paper, Curie from her radium memoir, Aurelius from his Meditations. The knowledge base is curated, not generated.

Music Grounded in Learning-environment Research Home-screen ambient regulates arousal between sessions. Post-session chimes timed to the zone reveal.

Calibration Discipline Calibrated against a 48-scenario battery across three training tiers: local pipeline, production harness, full production.

Security & Privacy Your conversations are yours. Full in-app account deletion, a web-based deletion request page (all personal data removed within 30 days), secure secrets handling, and Google Sign-In are in place. SOC 2 controls in flight.

Nothing Here is Improvised Grounded in 50+ peer-reviewed studies in conversation, learning, and honest design. Every part of the app, from the meter to the memory to the music, is anchored in published research.