# 21Moves | Cube Puzzle Solver vs Rubik's Clock

The clearest difference is review sentiment: Rubik's Clock at 100% against 21Moves | Cube Puzzle Solver's 70%. Rubik's Clock also leads on monetization model (free vs free with in-app purchases) and rating (5.0 vs 4.7). 21Moves | Cube Puzzle Solver's advantage is update cadence (weekly vs every 10 months) and ratings volume (60K vs 1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 21Moves | Cube Puzzle Solver sells 9 in-app purchases, starting at $1.99 per month and Rubik's Clock sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Rubik's Clock holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: 21Moves | Cube Puzzle Solver has 60K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 70% of 21Moves | Cube Puzzle Solver's written reviews are positive against 100% of Rubik's Clock's.

21Moves | Cube Puzzle Solver ships an update weekly, Rubik's Clock every 10 months. The most recent releases landed on November 4, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | 21Moves | Cube Puzzle Solver | Rubik's Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (60K ratings)](https://appshunter.io/ios/app/21moves-cube-puzzle-solver/id1533263247/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/rubiks-clock/id6746123692/reviews)** |
| Number of ratings | **60K** | 1 |
| Positive reviews | 69.6% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 10 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 157 MB | 20 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Opitas Inc.](https://appshunter.io/developer/1526688601) | [Uliana Gritchina](https://appshunter.io/developer/1619495556) |

## What reviewers say

### 21Moves | Cube Puzzle Solver

[App page](https://appshunter.io/ios/app/21moves-cube-puzzle-solver/id1533263247)

This app helps you solve your Rubik's Cube with visual, step-by-step instructions. It offers a quick solver, a cube scanner to analyze your current puzzle state, and even identifies missing or misplaced pieces. Become a puzzle-solving pro and improve your concentration and speed.

**Highlights:** 3D cube scanning, Visual step-by-step instructions, Quick cube solving, Cube fixer for missing/misplaced pieces, Puzzle skill building, Manual input for custom combinations

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Access | $1.99 | per month |
| Unlimited Access | $3.99 | per month |
| Unlimited Access | $4.99 | per year |
| Unlimited Access | $7.99 | per year |
| Unlimited Access | $14.99 | per year |
| Unlimited Access | $19.99 | per year |
| Unlimited Access | $24.99 | per year |
| Unlimited Access | $29.99 | one-time |
| Unlimited Access | $74.99 | one-time |

**What reviewers like**

- 🚀 Solves cube in 21 moves
- 👍 Easy to use and follow instructions
- 🚀 Solves cube quickly
- 👍 Helps fix broken/twisted cubes
- 👍 Accurate color recognition

**What reviewers complain about**

- 🐛 Scanning issues (glare, lighting)
- 💰 Requires payment after first use
- 🐛 App crashes or freezes
- 🐛 Inaccurate cube representation on screen

**Reported bugs**

- Scanning issues due to lighting conditions
- App crashing or freezing after first use
- Inaccurate cube representation on screen

**Requested features**

- Support for different cube sizes (2x2, 4x4, etc.)
- Option to skip tutorial
- Ability to solve cube without payment


### Rubik's Clock

[App page](https://appshunter.io/ios/app/rubiks-clock/id6746123692)

This app serves as a specialized stopwatch for speedcubing enthusiasts. It tracks your performance with detailed statistics and provides algorithms to help improve your solving times.

**Highlights:** Speedcubing stopwatch, Performance statistics, Algorithm library, Skill improvement tools

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads | $0.49 | one-time |


## Frequently asked questions

### Is 21Moves | Cube Puzzle Solver free?

21Moves | Cube Puzzle Solver is free to download, with in-app purchases available.

### Is Rubik's Clock free?

Rubik's Clock is free to download, with in-app purchases available.

### Which has better reviews, 21Moves | Cube Puzzle Solver or Rubik's Clock?

Rubik's Clock is rated higher. 21Moves | Cube Puzzle Solver averages 4.7 out of 5 from 60K ratings, while Rubik's Clock averages 5.0 from 1 ratings.

### Do 21Moves | Cube Puzzle Solver or Rubik's Clock have ads?

Neither 21Moves | Cube Puzzle Solver nor Rubik's Clock shows ads.

### Which is updated more often, 21Moves | Cube Puzzle Solver or Rubik's Clock?

21Moves | Cube Puzzle Solver ships an update weekly, and Rubik's Clock every 10 months. Most recently, 21Moves | Cube Puzzle Solver was updated on November 4, 2026 and Rubik's Clock on October 25, 2026.

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