# Rubber Duck Defender vs Deep Blue

The clearest difference is price: Deep Blue at Free against Rubber Duck Defender's $1.99. Deep Blue also leads on update cadence (every 16 months vs every 34 months). Rubber Duck Defender's advantage is rating (5.0 vs 4.4) and ads (none vs shown). On ratings volume, in-app purchases, device support and iOS requirement there is nothing between them.

Deep Blue is free to download; Rubber Duck Defender costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Rubber Duck Defender holds the better App Store score, 5.0 against 4.4. Both are backed by a comparable volume of ratings — 3 and 7 respectively.

Rubber Duck Defender ships an update every 34 months, Deep Blue every 16 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Rubber Duck Defender | Deep Blue |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/rubber-duck-defender/id1001871475/reviews)** | [4.4 (7 ratings)](https://appshunter.io/ios/app/deep-blue-manta/id1450112696/reviews) |
| Number of ratings | 3 | **7** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 34 months | **Every 16 months** |
| Monetization | Paid | **Ad-supported** |
| Size | 18 MB | 16 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ducky Planet LLC](https://appshunter.io/developer/442169107) | [Noriaki Murao](https://appshunter.io/developer/1289002723) |

## What reviewers say

### Rubber Duck Defender

[App page](https://appshunter.io/ios/app/rubber-duck-defender/id1001871475)

Defend yourself as a rubber duck against incoming toy boats by throwing rocks. Enjoy authentic graphics and sounds inspired by bath toys in this endless aquatic adventure.

**Highlights:** Play as a rubber duck, Defend against toy boats, Throw rocks at targets, Authentic bath toy graphics and sounds, Unlimited levels, Quick gameplay

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

**In-app purchases:** none


### Deep Blue

[App page](https://appshunter.io/ios/app/deep-blue-manta/id1450112696)

Guide mantas through underwater obstacle courses with simple one-finger swipes. Enjoy 50 unique stages, each under 20 seconds, with power-up modes and collectible badges. Compete with others for high scores via Game Center.

**Highlights:** One-finger swipe controls, 50 unique stages, Obstacle avoidance gameplay, Power mode for smashing obstacles, Collectible badges, Game Center leaderboards

**In-app purchases:** none


## Frequently asked questions

### Is Rubber Duck Defender free?

Rubber Duck Defender costs $1.99, with no in-app purchases.

### Is Deep Blue free?

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

### Which has better reviews, Rubber Duck Defender or Deep Blue?

Rubber Duck Defender is rated higher. Rubber Duck Defender averages 5.0 out of 5 from 3 ratings, while Deep Blue averages 4.4 from 7 ratings.

### Do Rubber Duck Defender or Deep Blue have ads?

Deep Blue shows ads; Rubber Duck Defender does not.

### Which is updated more often, Rubber Duck Defender or Deep Blue?

Rubber Duck Defender ships an update every 34 months, and Deep Blue every 16 months. Most recently, Rubber Duck Defender was updated on November 1, 2026 and Deep Blue on November 2, 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.*