Answers About the Mechanism, the App, and How It's Built
FAQ
The mechanism
How does Vesper Tesserae decide what to draw?
Every draw pulls from your phone's actual sensors in that moment — the time of day, the lunar phase, barometric pressure, and the direction you're facing. Different concepts lean on different combinations of these. Nothing about the draw is manual or user-selected.
Do I need to hold a specific question?
No. Hold whatever's on your mind — a specific question, a general feeling, or nothing articulated at all. The app has no way to see or store what you're asking; it only responds to the moment you draw in.
Can I influence what gets drawn?
Not directly. The sensors it reads change on their own — the hour passes, the moon moves through its phase, pressure shifts with weather, direction changes as you turn — but there's no way to select or filter for a particular concept.
What's the difference between an Arriving and a Departing reading?
Every concept has two faces. Arriving describes a condition moving toward you; Departing describes one already leaving. Which face you get is decided by the same draw that selects the concept.
→ Full mechanism: How It Works
Using the app
How do I draw?
Hold your question, flip the phone face-down, keep it there until you feel a small tap, then flip it back over.
Can I draw again right away?
Yes. Tap back to the home screen, or flip face-down again straight from the result screen to ask another question.
Does it save my past readings?
No. There's no journal, no history, no log of past questions or results. Each reading exists only while you're looking at it.
Can I look at concepts without drawing them?
Yes — the Codex lets you browse every axis and concept in the corpus at any time, independent of drawing.
Is there anything to configure?
No settings, no onboarding beyond a single instruction on the opening screen: turn over to draw.
Purchases & privacy
Is Vesper Tesserae free?
Yes, for 7 days — full corpus, nothing held back. After the trial, a one-time payment of $3.99 unlocks it permanently.
Is it a subscription?
No. It's a single one-time purchase. No recurring billing, ever.
Do I need to create an account?
No account, no sign-in, no profile.
Is any of my data collected?
No. No accounts, no analytics, no cloud sync. Nothing about your use of the app is collected or transmitted anywhere.
Terminology
What is an axis?
One of eight underlying tensions the corpus is organized around — pairs of opposing states, like Concealment and Exposure, or Severance and Binding.
What is a pole?
Each axis has two poles, its two opposing ends. Most concepts lean toward one pole or the other.
What is a "middle" concept?
Each axis also has one concept that sits at the exact center, between its two poles, rather than leaning toward either. It's marked with a ✦ on the result screen instead of a position dot.
What do Arriving and Departing mean?
The two faces every concept can show — a condition moving toward you (Arriving), or one already moving away (Departing).