# Rostlinky vs Sonar Islands

The clearest difference is review sentiment: Rostlinky at 100% against Sonar Islands's 60%. Rostlinky also leads on in-app purchases (none vs 5). Sonar Islands's advantage is update cadence (every 2 months vs every 72 months) and iOS requirement (12.5 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. Sonar Islands sells 5 in-app purchases, starting at $2.99 per month. Rostlinky asks for nothing beyond the download.

Rostlinky ships an update every 72 months, Sonar Islands every 2 months. The most recent releases landed on October 15, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Rostlinky | Sonar Islands |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.5 (83 ratings)](https://appshunter.io/ios/app/sonar-islands/id1554817644/reviews)** |
| Number of ratings | — | **83** |
| Positive reviews | **100.0% of reviews** | 60.1% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 72 months | **Every 2 months** |
| Monetization | **Free** | Subscription |
| Size | 75 MB | 288 MB |
| Requires iOS | 15.0 | **12.5** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Česká televize](https://appshunter.io/developer/522546879) | [Hansjoerg Mikesch](https://appshunter.io/developer/1422421759) |

## What reviewers say

### Rostlinky

[App page](https://appshunter.io/ios/app/rostlinky/id1504873776)

Choose a plant and start growing. Collect bonuses and avoid other plants on the playing field. Can you grow longer than your friends?

**Highlights:** Choose your plant, Collect bonuses, Avoid other plants, Competitive growth, Simple controls

**Features:** macOS Compatibility

**In-app purchases:** none


### Sonar Islands

[App page](https://appshunter.io/ios/app/sonar-islands/id1554817644)

Embark on an audio-driven multiplayer adventure across 14 unique islands. Build your empire, explore diverse environments from ancient temples to volcanic landscapes, and engage in various challenges. Full game access requires a subscription.

**Highlights:** Multiplayer online gameplay, Audio-driven events, Empire building, Island exploration and development, Diverse island themes, Tutorial and story modes

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Access - monthly | $2.99 | per month |
| Full Access - yearly | $29.49 | per year |
| 100 Diamonds | $0.99 | one-time |
| 500 Diamonds | $3.99 | one-time |
| 1000 Diamonds | $5.99 | one-time |

**What reviewers like**

- 🚀 Immersive audio experience
- 👍 Accessible for blind users
- 🎨 Fantastic sound design
- ⭐ Engaging gameplay
- 🕹️ Intuitive controls

**What reviewers complain about**

- 💰 Subscription model required to access full game
- 🔇 Repetitive voice acting
- 🕰️ Slow progression without paying
- 🤖 Unresponsive controls at times
- 🔍 Lack of clear in-game instructions

**Reported bugs**

- Crashes and freezes on certain devices
- Compass and navigation issues with iOS 16
- Incorrect Morse code in tutorial
- Inconsistent audio cues

**Requested features**

- Additional free islands to explore
- Option to purchase game outright instead of subscription
- More varied event types and challenges
- Ability to customize islands
- Support for multiple languages


## Frequently asked questions

### Is Rostlinky free?

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

### Is Sonar Islands free?

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

### Do Rostlinky or Sonar Islands have ads?

Neither Rostlinky nor Sonar Islands shows ads.

### Which is updated more often, Rostlinky or Sonar Islands?

Rostlinky ships an update every 72 months, and Sonar Islands every 2 months. Most recently, Rostlinky was updated on October 15, 2026 and Sonar Islands on October 27, 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.*