# Solar Walk Ads+：Planets System vs ALC

The clearest difference is in-app purchases: ALC at none against Solar Walk Ads+：Planets System's 11. ALC also leads on ads (none vs shown) and update cadence (every 2 months vs every 6 months). Solar Walk Ads+：Planets System's advantage is iOS requirement (15.0 vs 26.0). On price and device support there is nothing between them.

Both are free to download. Solar Walk Ads+：Planets System sells 11 one-off in-app purchases. ALC asks for nothing beyond the download.

Solar Walk Ads+：Planets System ships an update every 6 months, ALC every 2 months. The most recent releases landed on October 28, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Solar Walk Ads+：Planets System | ALC |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (9.9K ratings)](https://appshunter.io/ios/app/solar-walk-ads-plus-planets-system/id559702509/reviews)** | — |
| Number of ratings | **9.9K** | — |
| Positive reviews | 72.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 6 months | **Every 2 months** |
| Monetization | Free with in-app purchases | — |
| Size | 466 MB | 44 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Vito Technology Inc.](https://appshunter.io/developer/289641503) | [Stacks Inc.](https://appshunter.io/developer/1275752393) |

## What reviewers say

### Solar Walk Ads+：Planets System

[App page](https://appshunter.io/ios/app/solar-walk-ads-plus-planets-system/id559702509)

Explore a 3D model of our solar system, interact with celestial bodies, and take virtual flights through space. Learn about planets, moons, satellites, and more with educational movies and real-time orientation. Discover the universe from your device.

**Highlights:** Interactive 3D solar system model, Real-time celestial body orientation, Virtual flights between space objects, Time travel to view past universe states, Educational solar system movies, 3D planetarium with anaglyph mode

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

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| The Curiosity Rover Landing | $0.99 | one-time |
| The Earth Surface in detail | $0.99 | one-time |
| Launch of Hubble Telescope | $0.99 | one-time |
| 3D Satellites in Real Time | $0.99 | one-time |
| Planets of the Solar System | $0.99 | one-time |
| High Resolution Bundle | $1.99 | one-time |
| Full Version | $2.99 | one-time |
| Missions Bundle | $2.99 | one-time |
| Movies Bundle | $2.99 | one-time |
| All Additional Content - Sale | $2.99 | one-time |
| Unlock Full Version With All Additional Content | $7.99 | one-time |

**What reviewers like**

- 🚀 Realistic and detailed graphics
- 🌌 Ability to explore the solar system
- 📚 Informative and educational
- 🎨 Beautiful background music
- 🤩 Engaging and immersive experience

**What reviewers complain about**

- 💰 Expensive in-app purchases
- 🔍 Limited free content
- 🔌 High battery consumption
- 🐛 Occasional crashes and glitches
- 🚫 Intrusive ads even in paid version

**Reported bugs**

- App freezes on launch
- Purchased content not restoring
- Planets and moons not displaying properly
- Frequent crashes when navigating the solar system

**Requested features**

- Ability to explore other galaxies and the universe
- More interactive features like landing on planets
- Removal of paywall for core content
- Improved performance and stability
- Customization options like dark mode


### ALC

[App page](https://appshunter.io/ios/app/alc-library/id6764153641)

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

**In-app purchases:** none


## Frequently asked questions

### Is Solar Walk Ads+：Planets System free?

Solar Walk Ads+：Planets System is free to download, with in-app purchases available.

### Is ALC free?

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

### Do Solar Walk Ads+：Planets System or ALC have ads?

Solar Walk Ads+：Planets System shows ads; ALC does not.

### Which is updated more often, Solar Walk Ads+：Planets System or ALC?

Solar Walk Ads+：Planets System ships an update every 6 months, and ALC every 2 months. Most recently, Solar Walk Ads+：Planets System was updated on October 28, 2026 and ALC on October 16, 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.*