Word Unknown vs PrimeXTime
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
Read full descriptionHide full description
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.
PrimeXTime
Engage your mind with a unique number-based puzzle game. Start with a random number and strategically divide by single-digit primes. Bump the number by multiplying by 10 and adding a digit to reach 1 and win.
- Number division by primes
- Strategic bumping mechanic
- Goal to reduce number to 1
- Brain exercise gameplay
- Simple, intuitive interface
Read full descriptionHide full description
Kill some time and give your brain a little exercise at the same time with this simple game. You start with a random number and then start dividing by single-digit primes (2, 3, 5 or 7). When you can't do any more divisions you 'bump' the number -- multiplying by 10 and adding any single digit. You win the game by reducing the original number to 1.
Screenshots
Verdict
The clearest difference is update cadence: PrimeXTime at every 4 months against Word Unknown's every 16 months. Word Unknown's advantage is ratings volume (11 vs 2) and iOS requirement (6.0 vs 17.6). On price, rating, review sentiment and ads 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.
On the App Store both sit at effectively the same score — 4.9 for Word Unknown against 5.0 for PrimeXTime. That said, the two scores are not equally well evidenced: Word Unknown has 11 ratings behind it against 2, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.
Word Unknown ships an update every 16 months, PrimeXTime every 4 months. The most recent releases landed on October 18, 2026 and October 13, 2026 respectively.
| Parameter | Word Unknown | PrimeXTime |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (11 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 11 — better | 2 |
| Update frequency | Every 16 months | Every 4 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 6.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 15 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Cinq-Mars Media | Rick Hutchinson |
Customer experience
Word Unknown
PrimeXTime
In-app purchases
Word Unknown
No in-app purchases
PrimeXTime
No in-app purchases
