Comparison

The Futoshiki vs Codex!

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

Head to head
About

The Futoshiki

Engage your logic with a Japanese number puzzle game. Fill grids with numbers, respecting row, column, and inequality constraints. Offers multiple difficulty levels and thousands of unique challenges.

Highlights
  • Logic puzzle gameplay
  • Number placement
  • Inequality constraints
  • Multiple difficulty levels
  • Thousands of unique levels
  • Grid-based challenges
Features
Read full description

What is Futoshiki? Futoshiki is a funny logic puzzle game from Japan. In this game you need to fill all cells with numbers. Some cells can be filled initially, the rest is filled by the player. The game is very similar to the game "Sudoku", but it has a difference. On the playing field, in addition to numbers, there may also be signs (more, less). The sign between two cells means that one number is greater than the other. A correctly filled square must satisfy the following three conditions: 1. The numbers in each line should not be repeated. 2. The numbers in each column should not be repeated. 3. If there are signs (arrows) on the field, then the condition must be met. (One number is smaller than the other). Levels. In the program you can choose 6 difficulty levels (4x4, 5x5, 6x6, 7x7, 8x8 and 9x9). The larger the square, the more difficult it is to go through. If you play Futoshiki for the first time, we recommend that you start with a 4x4 square. At each level of complexity you will be offered 2000 unique game levels. The higher the number the more difficult. (Level 2000 is the most complex). How to play? To change the value of a cell - first select it, and then click on the numbers at the bottom of the screen to put a number in the cell. You can put several numbers in one cell at once, but the level is considered passed, when in each cell there is only one number. If you want to remove a number from the cell, select it and click the corresponding number in the bottom of the screen.

About

Codex!

Engage your mind with a daily word puzzle that tests your vocabulary and logic. This game offers a classic brain teaser experience for enthusiasts of word games and crosswords.

Highlights
  • Daily brain teaser
  • Word puzzle challenges
  • Vocabulary testing
  • Logic challenges
  • Classic word game experience
Features
Read full description

Are you a word puzzle master? Whether you enjoy classic crossword puzzles or modern word games, Codex! will get you thinking. Take on the daily brain teaser and challenge your brain with this word game.

Screenshots

The Futoshiki4 screens
Codex!4 screens

Verdict

The call

The clearest difference is ads: Codex! at none against The Futoshiki's shown. Codex! also leads on update cadence (every 4 days vs every 2 months) and review sentiment (100% vs 73%). The Futoshiki's advantage is ratings volume (792 vs 10) and device support (3 vs 1). On price 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Codex! holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: The Futoshiki has 792 ratings behind it against 10, so its average is the more settled of the two. Written reviews point the same way: 73% of The Futoshiki's written reviews are positive against 100% of Codex!'s.

UpkeepUpdate frequency

The Futoshiki ships an update every 2 months, Codex! every 4 days. The most recent releases landed on October 20, 2026 and October 10, 2026 respectively.

Scorecard8 real differences · 2 level
The Futoshiki versus Codex!: the parameters behind the verdict, then further details
ParameterThe FutoshikiCodex!
PriceFreeFree
Rating4.7 (792 ratings)5.0 (10 ratings) — better
Positive reviews73.5% of reviews100.0% of reviews — better
Number of ratings792 — better10
Update frequencyEvery 2 monthsEvery 4 days — better
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supportedFree — better
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS13.0 — better26.0
Further details — not scored
Size10 MB11 MB
Age rating12+4+
DeveloperAliaksandr UvarauSteven Phun

Customer experience

The Futoshiki

All ratings792 ratings
Positive95.5%
Neutral1.9%
Negative2.7%
Written reviews181 reviews
Positive73.5%
Neutral11.6%
Negative14.9%

Codex!

All ratings10 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews7 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

The Futoshiki

Reported bugs

3 issues
  • Puzzles reported as unsolvable
  • Clipboard access without user consent
  • Inconsistent timer/timing issues

Requested features

5 requests
  • Add pencil mode to mark potential numbers
  • Implement error checking and hint features
  • Ability to grade/sort puzzles by difficulty
  • Add timer and ability to view completion time
  • Improve level selection and navigation

Codex!

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

The Futoshiki

No in-app purchases

None

Codex!

No in-app purchases

Questions

Is The Futoshiki free?
The Futoshiki is free to download, with no in-app purchases.
Is Codex! free?
Codex! is free to download, with no in-app purchases.
Which has better reviews, The Futoshiki or Codex!?
Codex! is rated higher. The Futoshiki averages 4.7 out of 5 from 792 ratings, while Codex! averages 5.0 from 10 ratings.
Do The Futoshiki or Codex! have ads?
The Futoshiki shows ads; Codex! does not.
Which is updated more often, The Futoshiki or Codex!?
The Futoshiki ships an update every 2 months, and Codex! every 4 days. Most recently, The Futoshiki was updated on October 20, 2026 and Codex! on October 10, 2026.

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