# Solar Walk vs Sapling Isle

The clearest difference is price: Sapling Isle at Free against Solar Walk's $4.99. Sapling Isle also leads on in-app purchases (none vs 11) and update cadence (fortnightly vs every 5 months). Solar Walk's advantage is chart position (#170 vs unranked) and iOS requirement (15.0 vs 18.0). On ads and device support there is nothing between them.

Sapling Isle is free to download; Solar Walk costs $4.99 up front. Solar Walk sells 11 one-off in-app purchases. Sapling Isle asks for nothing beyond the download.

Solar Walk ships an update every 5 months, Sapling Isle fortnightly. The most recent releases landed on September 28, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Solar Walk | Sapling Isle |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | **[4.7 (8.1K ratings)](https://appshunter.io/ios/app/solar-walk-space-simulator-3d/id347546771/reviews)** | — |
| Number of ratings | **8.1K** | — |
| Positive reviews | 72.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 months | **Fortnightly** |
| Monetization | Free with in-app purchases | — |
| Best chart rank | **#170** | — |
| Size | 451 MB | 40 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Vito Technology Inc.](https://appshunter.io/developer/289641503) | [大鹏 张](https://appshunter.io/developer/937718061) |

## What reviewers say

### Solar Walk

[App page](https://appshunter.io/ios/app/solar-walk-space-simulator-3d/id347546771)

**Currently charting:** #170 Top Paid · Education (US App Store)

Explore a detailed 3D model of our solar system and the universe. Interact with planets, moons, and satellites, and take virtual flights through space. Travel through time to see the universe's past and learn with educational movies.

**Highlights:** Interactive 3D solar system model, Virtual flights between celestial bodies, Time travel feature for historical views, Educational movies about space, Orrery and true-to-scale view modes, Milky Way Galaxy view

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

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Mission of Cassini-Huygens | Free | one-time |
| Cycles of the Earth System | Free | one-time |
| Major Circles of Latitude | Free | one-time |
| Movies Bundle | Free | one-time |
| 3D Satellites in Real Time | Free | one-time |
| Planets of the Solar System | Free | one-time |
| What is a Solar Eclipse? | Free | one-time |
| The Moon Phases Explanation | Free | one-time |
| Zodiacal Constellations | Free | one-time |
| High Resolution Bundle | $1.99 | one-time |
| All Additional Content - Sale | $2.99 | one-time |

**What reviewers like**

- 🌟 Excellent graphics and visuals
- 🔍 Detailed information about the solar system
- 🌍 Ability to explore the planets and moons
- 🎥 Informative videos and animations
- 🧠 Educational and informative for all ages

**What reviewers complain about**

- 💰 Expensive in-app purchases required to unlock full features
- 🐛 Bugs and crashes reported, especially after updates
- 🕹️ Navigation and controls can be unintuitive
- 🌌 Limited to just the solar system, no other galaxies or deep space

**Reported bugs**

- App crashes on launch for some users
- In-app purchases not working correctly
- Freezing and performance issues on older devices
- Incorrect planet/moon positioning and timing

**Requested features**

- Add more planets, moons, and objects to the solar system
- Expand to include other star systems and galaxies
- Improve navigation and controls for easier exploration
- Offer more free content instead of paid add-ons
- Fix reported bugs and crashes


### Sapling Isle

[App page](https://appshunter.io/ios/app/sapling-isle-physics-lab/id6792211746)

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

**In-app purchases:** none


## Frequently asked questions

### Is Solar Walk free?

Solar Walk costs $4.99, and also offers in-app purchases.

### Is Sapling Isle free?

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

### Do Solar Walk or Sapling Isle have ads?

Neither Solar Walk nor Sapling Isle shows ads.

### Which is updated more often, Solar Walk or Sapling Isle?

Solar Walk ships an update every 5 months, and Sapling Isle fortnightly. Most recently, Solar Walk was updated on September 28, 2026 and Sapling Isle on September 10, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*