Codex by Lloyd Barnes
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| Rating | Price | |||
|---|---|---|---|---|
| Spain | 50%1 | 1.00 | €59.99 $69.35 | |
| United States | 50%1 | 4.00 | $49.99 | |
| United Arab Emirates | <1%0 | — | AED 199.99 $54.49 | |
| Afghanistan | <1%0 | — | $49.99 | |
| Antigua And Barbuda | <1%0 | — | $49.99 | |
| Anguilla | <1%0 | — | $49.99 | |
| Albania | <1%0 | — | $59.99 | |
| Armenia | <1%0 | — | $59.99 | |
| Angola | <1%0 | — | $49.99 | |
| Argentina | <1%0 | — | $49.99 |
Description
Codex is a fast day-of-week calculator and card-stack reference tool designed for practice, rehearsal, and quick lookup. It provides accurate results with flexible output options so you can use it in different environments.
Day of Week Calculator
Enter or speak a date and Codex displays the correct weekday.
Optional haptic feedback and optional sounds can be enabled for hands-free or silent operation.
Customisation
Configure haptic strength, timing, and patterns.
Choose optional tones and volume.
Card & Stack Tools
Quick reference and practice utilities for common stacks and arrangements (e.g., Mnemonica, Aronson, Si Stebbins, Eight Kings, and more).
High-contrast, readable interface for rapid lookup.
Codex is built to be quick, reliable, and easy to use—whether you’re practicing at home or reviewing information on the go.