Codex by Lloyd Barnes
Next Generation Mindreading
Only for iPhone
$49.99 · Designed for iPhone. Not verified for macOS.
iPhone
Calculate the day of the week for any date or the total value of playing cards. Includes haptic/audio/text feedback, and stack tools for practice and quick lookup.
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.
Fixes issue with language recognition for certain languages.
Added link to Facebook group.
The developer, Lloyd Barnes, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Lloyd Barnes
- Size
- 2.4 MB
- Category
- Entertainment
- Compatibility
Requires iOS 17.6 or later.
- iPhone
Requires iOS 17.6 or later. - Mac
Requires macOS 14.6 or later and a Mac with Apple M1 chip or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © Lloyd Barnes 2026
