Comparison

Rotex vs NumChain

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

Head to head
About

Rotex

A two-player abstract strategy game where players aim to connect five tiles in a row. Each turn involves claiming a tile and rotating a section of the board to outmaneuver your opponent.

Highlights
  • Connect 5 tiles in a row
  • Board rotation mechanic
  • Online multiplayer
  • Single player vs AI
  • Pass and play mode
Features
Read full description

Rotex is a 2-player abstract strategy game with a simple objective — be the first player to connect 5 tiles in a row, in any direction. But, there's a twist… literally! On each turn, players will also rotate a region of the board clockwise. Use your rotations wisely to foil your opponent's plan and set yourself up for victory! Features: • Online Multiplayer - Invite a friend, or let Game Center find you a match. Take turns at your leisure! • Single Player vs Computer - Practice against an AI opponent, with three difficulty levels to choose from! • Pass and Play - Grab a friend and play against each other on the same device! How to Play: The goal is to connect five tiles in a row in any direction. On each turn, players must do two things: 1.) Select a grey tile on the board to turn it to their color. 2.) Select one of the seven gears on the board to rotate the tiles around it one notch in the clockwise direction. The game ends when one player connects five in a row of their color, or when there are no more grey tiles left to claim. If neither player gets five in a row, or both players get five in a row at the same time, the game is a draw.

About

NumChain

This number puzzle game sharpens mental math skills through engaging gameplay. Connect numbers to form chains, sums, and products across three distinct modes. Compete globally, earn achievements, and enjoy a clean, intuitive interface designed for all ages.

Highlights
  • Three game modes: Chains, Sums, Multiplication
  • Global leaderboards and achievements
  • Hint system for challenging puzzles
  • Intuitive interface and clean design
  • Optimized for iPhone and iPad
  • Develops mental calculation and strategic thinking
Features
Read full description

NumChain is a number puzzle that trains your mental math. Connect numbers on the board to build chains, sums and products, collect badges and beat your high score. THREE GAME MODES • CHAINS: Join consecutive numbers on the board and build the longest chain you can. • SUMS: Connect adjacent numbers to make sums and test your mental agility. • MULTIPLICATION: The ultimate challenge for math lovers. Multiply connected numbers and master the times tables. HINTS WHEN YOU'RE STUCK ‣ Earn points and spend them on hints. ‣ Reveal a strategic move or the solution when a puzzle gets tough. COMPETE WORLDWIDE ‣ Compete against players from around the world. ‣ Global leaderboards with Game Center. ‣ Transparent and fair scoring. ‣ Special achievements to unlock. FEATURES YOU'LL LOVE ‣ Exclusive medals and badges for your achievements. ‣ Intuitive interface and clean design. ‣ Play in portrait or landscape. ‣ Optimized for iPhone, foldable iPhone and iPad. ‣ Smooth, satisfying animations. BENEFITS FOR YOUR MIND ‣ Faster mental calculation. ‣ Strategic thinking and planning. ‣ Stronger visual and spatial memory. ‣ Better concentration. ‣ Basic and advanced math skills. ‣ Quick problem solving. ‣ Perfect for all ages. PERFECT FOR ‣ Students who want to improve their math skills in a fun way. ‣ Gamers who enjoy mental challenges. ‣ Adults who want to keep their mind sharp and active. ‣ Families looking for quality educational entertainment. ‣ Teachers looking for new learning tools. ‣ Competitive players who want to climb the world rankings. Practice regularly with NumChain to sharpen your math and thinking skills and climb the global leaderboard. Download NumChain now and train your brain with numbers!

Screenshots

Rotex4 screens
NumChain4 screens

Verdict

The call

The clearest difference is review sentiment: NumChain at 100% against Rotex's 50%. NumChain also leads on price (Free vs $0.99) and update cadence (monthly vs every 5 months). Rotex's advantage is in-app purchases (none vs 5) and ads (none vs shown). On 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

NumChain is free to download; Rotex costs $0.99 up front. NumChain sells 5 one-off in-app purchases. Rotex asks for nothing beyond the download.

UpkeepUpdate frequency

Rotex ships an update every 5 months, NumChain monthly. The most recent releases landed on November 1, 2026 and November 4, 2026 respectively.

Scorecard7 real differences · 3 level
Rotex versus NumChain: the parameters behind the verdict, then further details
ParameterRotexNumChain
Price$0.99Free — better
Rating5.0 (2 ratings) — better—
Positive reviews50.0% of reviews100.0% of reviews — better
Number of ratings2 — better—
Update frequencyEvery 5 monthsMonthly — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.0 — better18.0
Further details — not scored
Size5 MB14 MB
Age rating4+4+
DeveloperCurt SteinJ.Benito Pereira

Customer experience

Rotex

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews6 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

NumChain

Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Rotex

No in-app purchases

5 purchases

NumChain

One-time5
  • 25 Points$0.99
  • 53 Points$1.99
  • Ads Remove$2.99
Show 2 more
  • 85 Points$2.99
  • 110 Points$3.99

Questions

Is Rotex free?
Rotex costs $0.99, with no in-app purchases.
Is NumChain free?
NumChain is free to download, with in-app purchases available.
Do Rotex or NumChain have ads?
NumChain shows ads; Rotex does not.
Which is updated more often, Rotex or NumChain?
Rotex ships an update every 5 months, and NumChain monthly. Most recently, Rotex was updated on November 1, 2026 and NumChain on November 4, 2026.

Other comparisons