# Arcs vs NinjaSudoku

The clearest difference is price: NinjaSudoku at Free against Arcs's $2.99. Arcs's advantage is update cadence (every 2 months vs every 52 months) and iOS requirement (11.0 vs 15.6). On ads, in-app purchases and device support there is nothing between them.

NinjaSudoku is free to download; Arcs costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Arcs ships an update every 2 months, NinjaSudoku every 52 months. The most recent releases landed on August 16, 2026 and May 17, 2026 respectively.

## The numbers

| Metric | Arcs | NinjaSudoku |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[4.8 (56 ratings)](https://appshunter.io/ios/app/arcs/id302510211/reviews)** | — |
| Number of ratings | **56** | — |
| Positive reviews | 85.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 52 months |
| Monetization | Free | — |
| Size | 5 MB | 1 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pomegranate Apps LLC](https://appshunter.io/developer/293619496) | [Compiled](https://appshunter.io/developer/520829733) |

## What reviewers say

### Arcs

[App page](https://appshunter.io/ios/app/arcs/id302510211)

Engage your mind with a unique circular puzzle experience. Rotate and slide arcs to complete intricate designs, starting simple and progressing to complex challenges. This highly-rated game offers a fun and relaxing way to unwind.

**Highlights:** 100 circular puzzles, Rotate circles and slide arcs, Progressive difficulty, Zen and relaxing gameplay, Assist for colorblind people, New levels added

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### NinjaSudoku

[App page](https://appshunter.io/ios/app/ninjasudoku/id1236311684)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Arcs free?

Arcs costs $2.99, with no in-app purchases.

### Is NinjaSudoku free?

NinjaSudoku is free to download, with no in-app purchases.

### Do Arcs or NinjaSudoku have ads?

Neither Arcs nor NinjaSudoku shows ads.

### Which is updated more often, Arcs or NinjaSudoku?

Arcs ships an update every 2 months, and NinjaSudoku every 52 months. Most recently, Arcs was updated on August 16, 2026 and NinjaSudoku on May 17, 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.*