Word Unknown vs +/
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Word Unknown
A fun and simple word guessing game inspired by Hangman and Mastermind. Use logic to deduce a hidden word within a limited number of attempts, receiving feedback on correct letters and positions. Offers multiple difficulty levels and a daily challenge for competitive play.
- Word guessing gameplay
- Lexical and deductive logic
- Letter position feedback (X's and O's)
- Five difficulty levels
- Daily challenge mode
- Free and open source
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Word Unknown takes inspiration from both hangman and mastermind to create an incredibly fun and simple word game experience. Your objective is to guess a randomly generated word in as few moves as possible using both lexical and deductive logic. Once a legal guess is made, you'll get X's and O's in response. Each X represents a correct letter in the correct position, and each O represents a correct letter in the wrong position. There are five different difficulties (word lengths) to choose from and a daily challenge for each so you can compete with friends! Best of all, the game is 100% free and open source! Word Unknown is the second word game developed by Christopher Cinq-Mars Jarvis. His first is Synonymy, narrated by Richard Dawkins, which received distinctions at GDC and E3.
+/
A unique brain training puzzle game where you connect number tiles. Tiles of the same color add, while different colors subtract. Master spells and create life-forms using the power of zero to enhance your gameplay.
- Connect same number tiles
- Add same color tiles
- Subtract different color tiles
- Master unique spells
- Create life-forms with zero
- Brain training puzzle
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Magical Math Puzzle +/-0 (Plus or Minus Zero) is a new brain training puzzle game that is distinctly different from the other brain-dead games out there. Achieving the highest score all depends on what you choose to keep, and what you omit. This game truly tests your brains skills! CONNECT SAME NUMBER TILES! If the tiles are same color, the numbers are added. If the tiles are different color, the numbers are subtracted. These are the basic rules. It's easy and simple to play, but challenging to master! MASTER THE SPELLS! Learn lots of unique spells! Can you find the best way to master them?! Don't forget that your way of thinking is true magic! CREATE NEW LIFE-FORMS USING THE POWER OF ZERO! These are extra helpers to make you stronger. When you create ZERO many times, an egg will hatch and reveal a new Life-Form. Give them lots of love!
Screenshots
Verdict
Word Unknown and +/ both sit at 4.9 stars, but that hides the real split: 100% of Word Unknown's written reviews are positive against 33% of +/'s. Word Unknown also leads on in-app purchases (none vs 7) and ads (none vs shown). On price, rating, update cadence 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
Both are free to download. +/ sells 7 one-off in-app purchases. Word Unknown asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.9 for Word Unknown against 5.0 for +/. Both are backed by a comparable volume of ratings — 11 and 3 respectively. Written reviews are what separate them: 100% of Word Unknown's written reviews are positive against 33% of +/'s.
Both ship on a similar rhythm, roughly every 16 months. The most recent releases landed on October 24, 2026 and October 16, 2026 respectively.
| Parameter | Word Unknown | +/ |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (11 ratings) | 5.0 (3 ratings) — better |
| Positive reviews | 100.0% of reviews — better | 33.3% of reviews |
| Number of ratings | 11 — better | 3 |
| Update frequency | Every 16 months | Every 16 months |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 6.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 15 MB | 118 MB |
| Age rating | 4+ | 4+ |
| Developer | Cinq-Mars Media | Greentail, Inc. |
Customer experience
Word Unknown
+/
In-app purchases
Word Unknown
No in-app purchases
+/
- Flask of Essences$0.99
- Remove Ads$1.99
- Cashman$1.99
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- Bottle of Essences$3.99
- Bucket of Essences$9.99
- Tank of Essences$39.99
- Bath of Essences$79.99
