# Loops vs Calcudoku

The clearest difference is in-app purchases: Calcudoku at none against Loops's 2. Calcudoku also leads on iOS requirement (15.0 vs 17.0). Loops's advantage is ads (none vs shown) and update cadence (every 3 days vs every 3 weeks). On price and device support there is nothing between them.

Both are free to download. Loops sells 2 one-off in-app purchases. Calcudoku asks for nothing beyond the download.

Loops ships an update every 3 days, Calcudoku every 3 weeks. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Loops | Calcudoku |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (4 ratings)](https://appshunter.io/ios/app/calcudoku-math-logic-puzzles/id6772270032/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 3 days** | Every 3 weeks |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 101 MB | 104 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [DAVID GREBEN](https://appshunter.io/developer/1896494067) | [LogicSmith](https://appshunter.io/developer/6772270034) |

## What reviewers say

### Loops

[App page](https://appshunter.io/ios/app/loops-slitherlink-puzzles/id6772202256)

Engage in a daily loop logic puzzle game that sharpens your mind. Enjoy a beautifully crafted, ad-free experience with multiple difficulty levels and offline play. Unlock all content with a single purchase.

**Highlights:** Daily new logic puzzles, Five difficulty tiers, Hints that teach techniques, Ad-free and distraction-free, Offline play, no account needed, One-time purchase for full unlock

**Features:** iPhone Duo support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Loops Premium (intro) | $5.99 | one-time |
| Loops Premium | $9.99 | one-time |


### Calcudoku

[App page](https://appshunter.io/ios/app/calcudoku-math-logic-puzzles/id6772270032)

This logic puzzle game offers a unique approach to learning how to solve number grids. Instead of simply revealing answers, it provides intelligent, step-by-step guidance on logical strategies and note-taking to help you master the puzzles.

**Highlights:** Intelligent step-by-step explanations, Optional auto notes for cages, Intuitive note-taking interface, Variety of arithmetic operations, Grids for all skill levels, Offline-first architecture, Dark mode support

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Loops free?

Loops is free to download, with in-app purchases available.

### Is Calcudoku free?

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

### Do Loops or Calcudoku have ads?

Calcudoku shows ads; Loops does not.

### Which is updated more often, Loops or Calcudoku?

Loops ships an update every 3 days, and Calcudoku every 3 weeks. Most recently, Loops was updated on October 28, 2026 and Calcudoku 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.*