# Singleton Quest vs Duono

The clearest difference is price: Singleton Quest at Free against Duono's $2.99. Singleton Quest also leads on iOS requirement (12.0 vs 17.0). Duono's advantage is update cadence (every 2 weeks vs monthly). On ads, in-app purchases and device support there is nothing between them.

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

Singleton Quest ships an update monthly, Duono every 2 weeks. The most recent releases landed on September 22, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Singleton Quest | Duono |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | — | **[4.0 (1 ratings)](https://appshunter.io/ios/app/duono-binary-logic-puzzle/id6745228046/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 83.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 weeks** |
| Monetization | — | Paid |
| Size | 453 MB | 23 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Homo Ludens GmbH](https://appshunter.io/developer/1521470669) | [Fatma Nur Usluer](https://appshunter.io/developer/1811406191) |

## What reviewers say

### Singleton Quest

[App page](https://appshunter.io/ios/app/singleton-quest/id1585786497)

**Features:** macOS Compatibility

**In-app purchases:** none


### Duono

[App page](https://appshunter.io/ios/app/duono-binary-logic-puzzle/id6745228046)

Engage in a unique binary logic puzzle adventure with a beautiful sun and moon theme. Solve tricky tango-style patterns using pure logic, with no guessing required. Enjoy offline play, global competition, and a distraction-free experience.

**Highlights:** Unique Sun & Moon Theme, 100% Offline Gaming, Ad-Free Experience, Game Center Integration, Multiple Difficulty Levels, Smart Hint System, Unlimited Undo

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

**In-app purchases:** none


## Frequently asked questions

### Is Singleton Quest free?

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

### Is Duono free?

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

### Do Singleton Quest or Duono have ads?

Neither Singleton Quest nor Duono shows ads.

### Which is updated more often, Singleton Quest or Duono?

Singleton Quest ships an update monthly, and Duono every 2 weeks. Most recently, Singleton Quest was updated on September 22, 2026 and Duono on September 10, 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.*