# Duet Game vs SubX

The clearest difference is price: SubX at Free against Duet Game's $2.99. SubX also leads on update cadence (every 4 weeks vs every 3 months) and iOS requirement (7.0 vs 13.0). Duet Game's advantage is ratings volume (2.1K vs 1) and chart position (#52 vs unranked). On rating, review sentiment, ads and in-app purchases there is nothing between them.

SubX is free to download; Duet Game costs $2.99 up front. Duet Game sells 2 one-off in-app purchases and SubX sells 6 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.9 for Duet Game against 5.0 for SubX. That said, the two scores are not equally well evidenced: Duet Game has 2.1K ratings behind it against 1, so its average is the more settled of the two. Written reviews are what separate them: 97% of Duet Game's written reviews are positive against 100% of SubX's.

Duet Game ships an update every 3 months, SubX every 4 weeks. The most recent releases landed on November 1, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Duet Game | SubX |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [4.9 (2.1K ratings)](https://appshunter.io/ios/app/duet-game/id634235735/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/subx/id884980437/reviews)** |
| Number of ratings | **2.1K** | 1 |
| Positive reviews | 96.9% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 4 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | **#52** | — |
| Size | 111 MB | 135 MB |
| Requires iOS | 13.0 | **7.0** |
| Devices | **iPhone, iPad, iPod, Apple TV** | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Kumobius](https://appshunter.io/developer/449069247) | [Mobile App City Pty Ltd](https://appshunter.io/developer/592523908) |

## What reviewers say

### Duet Game

[App page](https://appshunter.io/ios/app/duet-game/id634235735)

**Currently charting:** #52 Top Paid · Casual, #104 Top Paid · Action (US App Store)

Control two synchronized vessels, navigating a challenging and hypnotic trance. Survive against all odds through nine chapters of deceptive narrative and nerve-twisting gameplay. Unlock bonus content and perfect your movements for endless score-chasing delight.

**Highlights:** Control two synchronized vessels, Nine chapters of narrative gameplay, Bonus Survival chapter, Over 25 Game Center achievements, Eight new epilogue chapters, Air-tight controls, Hypnotic handcrafted soundtrack

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Encore Chapters | $0.99 | one-time |
| Soliloquy Chapters | $0.99 | one-time |

**What reviewers like**

- 🎨 Beautiful visuals
- 🎶 Immersive soundtrack
- 🧠 Challenging gameplay
- 👍 Satisfying sense of achievement
- 🤖 Thoughtful narration

**What reviewers complain about**

- 🐛 Occasional bugs and glitches
- 🔊 Music sometimes cuts out
- 💰 Encore chapter locked behind paywall

**Reported bugs**

- Inconsistent save point tracking
- Unresponsive controls in later levels

**Requested features**

- More levels and challenges
- Level editor to create custom stages
- Ability to adjust gameplay speed
- Randomized obstacle patterns


### SubX

[App page](https://appshunter.io/ios/app/subx/id884980437)

Pilot a research submarine shrunk to cellular size to combat a deadly virus. Destroy viral defenses to learn about and upgrade your vessel. Survive increasingly difficult levels with various enemy types and unlock new abilities.

**Highlights:** Cellular-level virus combat, Submarine upgrades and abilities, Over 50 challenging levels, Multiple enemy types, In-game currency system, Leaderboards, Vibrant visuals

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads | $0.99 | one-time |
| 1000 coins | $1.99 | one-time |
| 2500 coins | $3.99 | one-time |
| 5000 coins | $5.99 | one-time |
| 10000 coins | $9.99 | one-time |
| 50000 coins | $36.99 | one-time |


## Frequently asked questions

### Is Duet Game free?

Duet Game costs $2.99, and also offers in-app purchases.

### Is SubX free?

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

### Which has better reviews, Duet Game or SubX?

SubX is rated higher. Duet Game averages 4.9 out of 5 from 2.1K ratings, while SubX averages 5.0 from 1 ratings.

### Do Duet Game or SubX have ads?

Neither Duet Game nor SubX shows ads.

### Which is updated more often, Duet Game or SubX?

Duet Game ships an update every 3 months, and SubX every 4 weeks. Most recently, Duet Game was updated on November 1, 2026 and SubX on October 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.*