# SOLAR ONE vs Eastman World

SOLAR ONE and Eastman World are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

SOLAR ONE ships an update every 4 months, Eastman World every 3 months. The most recent releases landed on October 30, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | SOLAR ONE | Eastman World |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 months** |
| Size | 347 MB | 72 MB |
| Requires iOS | 13.0 | **12.4** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Solar One](https://appshunter.io/developer/1649006606) | [Chengdu E-Linter Information Technology Co., Ltd.](https://appshunter.io/developer/1149235329) |

## What reviewers say

### SOLAR ONE

[App page](https://appshunter.io/ios/app/solar-one/id6443745666)

**Features:** macOS Compatibility

**In-app purchases:** none


### Eastman World

[App page](https://appshunter.io/ios/app/eastman-world/id6499481348)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SOLAR ONE free?

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

### Is Eastman World free?

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

### Do SOLAR ONE or Eastman World have ads?

Neither SOLAR ONE nor Eastman World shows ads.

### Which is updated more often, SOLAR ONE or Eastman World?

SOLAR ONE ships an update every 4 months, and Eastman World every 3 months. Most recently, SOLAR ONE was updated on October 30, 2026 and Eastman World on October 2, 2026.

---

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