Datum sends a model only the fields named for that surface, and every reply comes back with a receipt. Your password, your keys and your Field Book never leave your device.
One AI face
Datumly is the only voice that speaks to you in Datum. It builds in the Workshop, deals and coaches at the Table, and answers inside the lessons. Behind it sit several models from several companies, chosen per job; the receipt names which one did the work. No other character, companion or assistant exists here.
A receipt on every reply
Every reply from Datumly carries a receipt: what left your device, what stayed, what the model did, and where it was unsure. It looks like this.
What each surface sends
Make · The Workshop
Sent: What you typed, the kit you started from, and the current page when you ask for a change. The model returns the page and a receipt saying what it did, what it was unsure of, and what it refused.
Stays: Your name, your other pages, your Field Book. A page you send to a person carries only itself.
Make · The Studio
Sent: The words you gave for a picture, sound or film, and the picture itself when you ask for a change or a film. Each provider is named on the result.
Stays: Everything else on the page, and anything in your Field Book.
Play · The Table
Sent: Nothing, for the hand itself: the cards and the grading live in the page, and your calls are stored only when you are signed in. When Datumly speaks after a call it is sent the card, your pick and your chip, and nothing about any other call you have made.
Stays: Your calibration curve, which is drawn on your device from your own calls and seen by you alone.
Play · The lessons
Sent: Your answer to the one question at the end of a lesson, and your question when you ask Datumly why. Nothing from your Field Book.
Stays: Which lessons you have finished, which is kept with your account and never sent to a model.
Keep · The Field Book
Sent: Nothing. The Field Book is encrypted in your browser with a key derived from a password we never see. Datumly cannot read it, and neither can we.
Stays: All of it.
What never leaves
- Your master password and the keys derived from it
- The Field Book's contents, encrypted or plain, unless you export them yourself
- Your calibration curve and your Table calls, which no model is ever sent as a set
- Your email address and your name, on any AI surface
The Index and its switch
The Datum Index is a monthly, public measure of how well people judge AI, built only from Table hands their owners agreed to count. A hand counts only after you switch that on in Keep. The switch is off by default, explained in one sentence, and reversible: switch it off and your hands stop counting from the next month. On the 1st of each month a job reads the month before from consenting people only and stores counts and means by kind of work and format, never a call, never a person and never a company by name. Any cell with fewer than 20 hands or fewer than 10 people is held back. No model is involved. The plate and its method are at /index.
Memory
Datumly remembers only if you ask it to. Memory is off by default and is one switch in Keep. Switched on, it keeps two things on your device: your calibration profile (what you said against how often you were right, by confidence and by skill, and the widest gap) and the titles and starter kits of pages you made in the Workshop. Never your picks on a card, never a page itself, never your Field Book.
It is used for one sentence about your own gap, at the end of a hand and after a build. That sentence is written on your device from those numbers; no model is called and nothing from the memory is sent to one. Signed in, a copy is kept on your account so it follows you. Export downloads exactly what is kept as a file; Erase removes it from this device and your account, and closing your account removes it too.
When AI is unavailable
The Table and the lessons work without a model. If a provider is down, over its spending ceiling, or you are offline, Datumly says the built-in line answered, and the receipt records that no model was called.