# Rotex vs NumChain

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.

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.

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

## The numbers

| Metric | Rotex | NumChain |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/rotex/id813943125/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Monthly** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 5 MB | 14 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Curt Stein](https://appshunter.io/developer/290225855) | [J.Benito Pereira](https://appshunter.io/developer/1267263346) |

## What reviewers say

### Rotex

[App page](https://appshunter.io/ios/app/rotex/id813943125)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### NumChain

[App page](https://appshunter.io/ios/app/numchain-math-number-puzzle/id6670266485)

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:** macOS Compatibility, Family Sharing, Vision Pro support, iPhone Duo support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 25 Points | $0.99 | one-time |
| 53 Points | $1.99 | one-time |
| Ads Remove | $2.99 | one-time |
| 85 Points | $2.99 | one-time |
| 110 Points | $3.99 | one-time |


## Frequently asked 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.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*