# Screws Nuts and Bolts vs DuoLogic

The clearest difference is rating: DuoLogic at 5.0 against Screws Nuts and Bolts's 3.0. DuoLogic also leads on ads (none vs shown) and update cadence (every 11 days vs every 5 months). Screws Nuts and Bolts's advantage is in-app purchases (none vs 1) and iOS requirement (13.0 vs 17.6). On price, ratings volume and device support there is nothing between them.

Both are free to download. DuoLogic sells 1 one-off in-app purchase. Screws Nuts and Bolts asks for nothing beyond the download.

DuoLogic holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 2 respectively.

Screws Nuts and Bolts ships an update every 5 months, DuoLogic every 11 days. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Screws Nuts and Bolts | DuoLogic |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/screws-nuts-and-bolts/id6469170596/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/duologic/id6771583734/reviews)** |
| Number of ratings | 2 | 2 |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Every 11 days** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 101 MB | 5 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Skilljoy, LLC](https://appshunter.io/developer/1096209515) | [Angelo Elmudesi](https://appshunter.io/developer/1896315717) |

## What reviewers say

### Screws Nuts and Bolts

[App page](https://appshunter.io/ios/app/screws-nuts-and-bolts/id6469170596)

Engage in a unique puzzle game where you unscrew objects and strategically place them into designated holes. Overcome challenging levels with the help of hints and boosters. This brain-training game offers a fresh take on sorting puzzles for family fun.

**Highlights:** Unscrew objects to solve levels, Place objects into different holes, Utilize hints and boosters, Brain training puzzles, Family-friendly gameplay, New puzzle game style

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

**In-app purchases:** none


### DuoLogic

[App page](https://appshunter.io/ios/app/duologic/id6771583734)

This is a pure and addictive binary logic puzzle game based on Binairo/Takuzu rules. It offers a progressive tutorial, multiple board sizes and difficulty levels, and a daily puzzle. Train your mind with this challenging yet easy-to-learn game.

**Highlights:** Binary logic puzzles, Progressive tutorial, Multiple board sizes, Daily puzzles, Special ×4 Mode, Hint system

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Game | $2.99 | one-time |


## Frequently asked questions

### Is Screws Nuts and Bolts free?

Screws Nuts and Bolts is free to download, with no in-app purchases.

### Is DuoLogic free?

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

### Which has better reviews, Screws Nuts and Bolts or DuoLogic?

DuoLogic is rated higher. Screws Nuts and Bolts averages 3.0 out of 5 from 2 ratings, while DuoLogic averages 5.0 from 2 ratings.

### Do Screws Nuts and Bolts or DuoLogic have ads?

Screws Nuts and Bolts shows ads; DuoLogic does not.

### Which is updated more often, Screws Nuts and Bolts or DuoLogic?

Screws Nuts and Bolts ships an update every 5 months, and DuoLogic every 11 days. Most recently, Screws Nuts and Bolts was updated on October 30, 2026 and DuoLogic on October 31, 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.*