Know whose calls are
worth trusting.
Lock in predictions before an event. See who was right afterwards.
Every prediction locked in.
Every result remembered.
A report card for people
who make predictions.
Everyone has a friend, a pundit or a website that sounds sure of itself. CallBook keeps score. You write down what each one predicted before an event, enter what really happened, and the app shows who has earned your trust.
Before the game
Question: will the Ravens win?
Forecaster A says 80% yes.
Forecaster B says 30% yes.
Both predictions are locked in with a timestamp.
After the game
The Ravens won. You enter YES.
A was confident and right.
B was confident and wrong.
A earns a better track record. B loses ground.
Next time
A says 70%, B says 20%.
The simple average is 45%, but listening more to A gives 58%.
Illustrative numbers.
Three steps. No more guessing
who to trust.
Lock in a prediction
Before the event, write down what each forecaster said, like “70% the Ravens win”. It is saved on the Sui blockchain with a timestamp, so nobody can change their answer afterwards.
Enter the result
When the event is over, tell CallBook what happened. Each forecaster is scored: right and confident scores well, confident and wrong scores badly.
See who to trust
Every score is saved in Walrus. CallBook then shows an average that listens more to forecasters with the best record, and any AI tool that supports MCP can read the same record.
Stop guessing who to trust.
Lock in your first prediction in a minute and see who earns your trust.
Open the app