# Atlantis Invaders vs SineBird!

The clearest difference is price: Atlantis Invaders at Free against SineBird!'s $2.99. SineBird!'s advantage is in-app purchases (none vs 70) and ads (none vs shown). On update cadence, device support and iOS requirement there is nothing between them.

Atlantis Invaders is free to download; SineBird! costs $2.99 up front. Atlantis Invaders sells 70 one-off in-app purchases. SineBird! asks for nothing beyond the download.

Atlantis Invaders ships an update fortnightly, SineBird! every 8 days. Both last shipped on October 25, 2026.

## The numbers

| Metric | Atlantis Invaders | SineBird! |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | **[4.7 (2.8K ratings)](https://appshunter.io/ios/app/atlantis-invaders/id1560947378/reviews)** | — |
| Number of ratings | **2.8K** | — |
| Positive reviews | 31.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | **Every 8 days** |
| Monetization | Free with in-app purchases | — |
| Size | 424 MB | 175 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Spirit Bomb](https://appshunter.io/developer/1560947380) | [Jakub Plachy](https://appshunter.io/developer/1610213241) |

## What reviewers say

### Atlantis Invaders

[App page](https://appshunter.io/ios/app/atlantis-invaders/id1560947378)

Dive into an underwater arcade shooter where you defend the sunken kingdom of Atlantis from mechanical invaders. Experience intense bullet-hell action, upgrade your submarine fleet, and battle colossal bosses in a stunning deep-sea environment. Play anytime, anywhere with 100% offline action.

**Highlights:** Deep-sea arcade shooter gameplay, Bullet-hell projectile dodging, Fleet building and submarine upgrades, Tactical drone support, Epic boss battles, Stunning underwater environments, 100% offline play

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

**In-app purchases (70)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Starter Pack 1 | $0.99 | one-time |
| Fortune Tree 1 | $0.99 | one-time |
| Fireworks Bundle 1 | $0.99 | one-time |
| 88 Diamonds Pack | $1.99 | one-time |
| Special Pack 1 | $1.99 | one-time |
| Piggy Bank 1 | $1.99 | one-time |
| Fortune Tree 2 | $1.99 | one-time |
| Expedition Bonus Pack 2 | $1.99 | one-time |
| Chapter Pack 4 | $2.99 | one-time |
| Evolve Pack | $2.99 | one-time |
| Starter Pack 2 | $3.99 | one-time |
| Chapter Pack 5 | $3.99 | one-time |
| Special Pack 2 | $4.99 | one-time |
| 240 Diamonds Pack | $4.99 | one-time |
| Special Pack 3 | $4.99 | one-time |
| 1 star Arctic Wolf | $4.99 | one-time |
| Piggy Bank 2 | $4.99 | one-time |
| Ship Fiddle Frog | $4.99 | one-time |
| Chapter Pack 6 | $4.99 | one-time |
| Chapter Pack 7 | $4.99 | one-time |
| Fortune Pack 1 | $4.99 | one-time |
| Veteran Pass 1 | $4.99 | one-time |
| Premium Card | $4.99 | one-time |
| Evolve Pack | $4.99 | one-time |
| Fireworks Bundle 2 | $4.99 | one-time |
| Starter Pack 001 | $4.99 | one-time |
| Starter Pack 1a | $4.99 | one-time |
| Fortune Tree 3 | $4.99 | one-time |
| Expedition Bonus Pack 3 | $4.99 | one-time |
| Expedition Pack 1 | $4.99 | one-time |
| Starter Pack 3 | $5.99 | one-time |
| Evolve Pack | $5.99 | one-time |
| Chapter Pack 9 | $6.99 | one-time |
| Evolve Pack | $6.99 | one-time |
| Chapter Pack 8 | $6.99 | one-time |
| Evolve Pack | $8.99 | one-time |
| Chapter Pack 10 | $8.99 | one-time |
| 520 Diamonds Pack | $9.99 | one-time |
| Special Pack 4 | $9.99 | one-time |
| 2 star Red Widow | $9.99 | one-time |
| 2 star Alchemist | $9.99 | one-time |
| Piggy Bank 3 | $9.99 | one-time |
| Fortune Tree 4 | $9.99 | one-time |
| Weekly Special Pack 1 | $9.99 | one-time |
| Evolve Pack | $11.99 | one-time |
| Chapter Pack 13 | $11.99 | one-time |
| Chapter Pack 14 | $12.99 | one-time |
| Veteran Pass 2 | $13.99 | one-time |
| Evolve Pack | $14.99 | one-time |
| Fortune Tree 5 | $14.99 | one-time |
| Chapter Pack 16 | $14.99 | one-time |
| 1120 Diamonds Pack | $19.99 | one-time |
| 3 star Alchemist | $19.99 | one-time |
| Super Premium Card | $19.99 | one-time |
| Fortune Medal Pack 3 | $19.99 | one-time |
| Weekly Special Pack 4 | $19.99 | one-time |
| Daily Special Pack 5 | $19.99 | one-time |
| Fortune Tree 6 | $19.99 | one-time |
| Daily Special Pack 6 | $19.99 | one-time |
| Daily Special Pack 4 | $19.99 | one-time |
| Weekly Special Pack 3 | $19.99 | one-time |
| Special Pack 5 | $19.99 | one-time |
| Expedition Bonus Pack 6 | $19.99 | one-time |
| Chapter Pack 21 | $19.99 | one-time |
| Chapter Pack 36 | $24.99 | one-time |
| Weekly Special Pack 6 | $29.99 | one-time |
| Daily Special Pack 7 | $29.99 | one-time |
| 3000 Diamonds Pack | $49.99 | one-time |
| Weekly Special Pack 8 | $49.99 | one-time |
| Daily Special Pack 8 | $49.99 | one-time |

**What reviewers like**

- 🚀 Fast-paced gameplay
- 👍 Fun and entertaining
- 💡 Competitive boss battles

**What reviewers complain about**

- 🐛 Bugs and crashes
- 🔋 Excessive ads and in-app purchases
- 👎 Lack of cloud save functionality

**Reported bugs**

- Game crashes on launch
- Progress not saving properly
- Connectivity issues

**Requested features**

- More level updates
- Improved save/load system
- Reduced advertising


### SineBird!

[App page](https://appshunter.io/ios/app/sinebird/id1614732029)

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

**In-app purchases:** none


## Frequently asked questions

### Is Atlantis Invaders free?

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

### Is SineBird! free?

SineBird! costs $2.99, with no in-app purchases.

### Do Atlantis Invaders or SineBird! have ads?

Atlantis Invaders shows ads; SineBird! does not.

### Which is updated more often, Atlantis Invaders or SineBird!?

Atlantis Invaders ships an update fortnightly, and SineBird! every 8 days. Most recently, Atlantis Invaders was updated on October 25, 2026 and SineBird! 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.*