L4D vs Codex by Lloyd Barnes
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
L4D
This entertainment app allows users to perform a magic trick involving four-digit numbers and two bank cards. It offers multiple input methods and is designed for easy execution. The app is intended solely for amusement.
- Force any 4-digit number
- Uses two bank cards
- Multiple input methods
- Easy to perform
- Entertainment purposes only
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L4D is a magic app that allows you to force any 4 digit number using two bank cards. Multiple input methods available Easy to perform App is for entertainment purposes only
Codex by Lloyd Barnes
This app offers a rapid day-of-week calculation and a reference tool for various card stacks. It's designed for practice and quick lookups with customizable feedback options for different environments.
- Day of week calculator
- Speak dates for weekday display
- Optional haptic feedback
- Customizable tones and volume
- Reference for common card stacks
- High-contrast interface
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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.
Screenshots
Verdict
The clearest difference is price: L4D at $29.99 against Codex by Lloyd Barnes's $49.99. On review sentiment, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
L4D costs $29.99 and Codex by Lloyd Barnes $49.99 up front. Neither carries in-app purchases, so what you see is what you pay.
L4D ships an update every 6 days, Codex by Lloyd Barnes every 9 days. The most recent releases landed on September 20, 2026 and October 3, 2026 respectively.
| Parameter | L4D | Codex by Lloyd Barnes |
|---|---|---|
| Price | $29.99 — better | $49.99 |
| Rating | — | 4.0 (1 ratings) — better |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Every 6 days — better | Every 9 days |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone | iPhone |
| Requires iOS | 16.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 34 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Joshua Riley | Lloyd Barnes |
Customer experience
L4D
Codex by Lloyd Barnes
In-app purchases
L4D
No in-app purchases
Codex by Lloyd Barnes
No in-app purchases
