Comparison

Codex4 vs Emoji Math

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Codex4

Build a usable vocabulary for your job, studies, or hobbies with smart, spaced repetition reviews. Master real word usage and track your progress with clear statistics. Designed for serious learners with a clean interface and no gimmicks.

Highlights
  • Add custom words from any text
  • Spaced repetition reviews (FSRS)
  • Master word lemmas and conjugations
  • Clear progress statistics
  • Automatic word extraction
  • Data export and offline access
Features
Read full description

Get fluent faster by learning the words you actually use. Codex4 helps you build a usable vocabulary and keep it for the long term. - Learn what you need: Add your own words from any text in one tap. Build vocabulary for your job, studies, or hobbies. - Retain more with less effort: Reviews are timed by FSRS (a modern spaced-repetition model) so you study exactly when it counts. - Master real usage: The app treats each word as a lemma, so forms and conjugations are covered naturally as you progress. - Stay organized and motivated: Clear stats show what’s due, what’s known, and what’s next. - Bring any content: Automatic word extraction and a context-aware lemmatizer handle homonyms and multi-word phrases. - Your data stays yours: Keep access to review even after unsubscribing, and export your words and learning data anytime. - No gimmicks: Fast sessions, clean design, built for serious learners. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Emoji Math

This app offers a playful math learning experience for children PreK to Grade 5. It replaces traditional methods with engaging games to build confidence and master arithmetic concepts like counting, addition, subtraction, multiplication, and division.

Highlights
  • Math games for PreK to Grade 5
  • Counting and number sense
  • Addition and subtraction
  • Place value understanding
  • Multiplication mastery
  • Basic division skills
Features
Read full description

Emoji Math is the ultimate math adventure designed specifically to build confidence and skills for children from Preschool (PreK) through Grade 5. We ditch the dull flashcards and endless worksheets, replacing them with a vibrant, playful learning experience that kids genuinely ask to play. Watch your child transform homework anxiety into excitement as they master essential arithmetic concepts through engaging, visually rich games. Preschool (PreK) & Kindergarten Counting & Number Sense: Simple ocounting up to 100. Grades 1 & 2 Core Addition & Subtraction: Mastering single and double-digit operations. Place Value: Understanding tens, ones and hundreds. Grades 3, 4, & 5 Multiplication Mastery: Understanding and Memorizing times. Basic Division: Understanding introductory division facts.

Screenshots

Codex44 screens
Emoji Math4 screens

Verdict

The call

Codex4 and Emoji Math both sit at 5.0 stars, but that hides the real split: 100% of Emoji Math's written reviews are positive against 50% of Codex4's. Emoji Math also leads on in-app purchases (none vs 4) and iOS requirement (13.0 vs 15.6). Codex4's advantage is price (Free vs $2.99). On rating, ratings volume, ads and device support 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

CostPrice · In-app purchases · Ads · Monetization

Codex4 is free to download; Emoji Math costs $2.99 up front. Codex4 sells 4 in-app purchases, starting at $12.99 per month. Emoji Math asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Codex4 against 5.0 for Emoji Math. Both are backed by a comparable volume of ratings — 2 and 1 respectively. Written reviews are what separate them: 50% of Codex4's written reviews are positive against 100% of Emoji Math's.

Scorecard5 real differences · 5 level
Codex4 versus Emoji Math: the parameters behind the verdict, then further details
ParameterCodex4Emoji Math
PriceFree — better$2.99
Rating5.0 (2 ratings)5.0 (1 ratings)
Positive reviews50.0% of reviews100.0% of reviews — better
Number of ratings2 — better1
Update frequencyEvery 4 days—
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemium — betterPaid
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.613.0 — better
Further details — not scored
Size52 MB92 MB
Age rating4+4+
DeveloperJonas RichnerStep Up Learning Labs

Customer experience

Codex4

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

Emoji Math

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

4 purchases

Codex4

Subscriptions4
  • Basic$12.991 Month
  • Pro$14.001 Month
  • Basic Yearly7 Days trial$69.991 Year
Show 1 more
  • Pro Yearly3 Days trial$85.001 Year
None

Emoji Math

No in-app purchases

Questions

Is Codex4 free?
Codex4 is free to download, with in-app purchases available.
Is Emoji Math free?
Emoji Math costs $2.99, with no in-app purchases.
Which has better reviews, Codex4 or Emoji Math?
Codex4 and Emoji Math are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.
Do Codex4 or Emoji Math have ads?
Neither Codex4 nor Emoji Math shows ads.

Other comparisons