The Futoshiki vs Codex!
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
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.
- Logic puzzle gameplay
- Number placement
- Inequality constraints
- Multiple difficulty levels
- Thousands of unique levels
- Grid-based challenges
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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.
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.
- Daily brain teaser
- Word puzzle challenges
- Vocabulary testing
- Logic challenges
- Classic word game experience
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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
Verdict
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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
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.
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.
| Parameter | The Futoshiki | Codex! |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (792 ratings) | 5.0 (10 ratings) — better |
| Positive reviews | 73.5% of reviews | 100.0% of reviews — better |
| Number of ratings | 792 — better | 10 |
| Update frequency | Every 2 months | Every 4 days — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 13.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 10 MB | 11 MB |
| Age rating | 12+ | 4+ |
| Developer | Aliaksandr Uvarau | Steven Phun |
Customer experience
The Futoshiki
Codex!
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
The Futoshiki
No in-app purchases
Codex!
No in-app purchases









