# WORLD4SOLAR vs OMMO Smart

WORLD4SOLAR and OMMO Smart 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.

WORLD4SOLAR ships an update every 5 weeks, OMMO Smart every 2 months. The most recent releases landed on September 9, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | WORLD4SOLAR | OMMO Smart |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 2 months |
| Size | 85 MB | 101 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Chengdu E-Linter Information Technology Co., Ltd.](https://appshunter.io/developer/1149235329) | [Shenzhen Energy Control Cloud Technology Co., Ltd](https://appshunter.io/developer/1765046101) |

## What reviewers say

### WORLD4SOLAR

[App page](https://appshunter.io/ios/app/world4solar/id6475158489)

**Features:** macOS Compatibility

**In-app purchases:** none


### OMMO Smart

[App page](https://appshunter.io/ios/app/ommo-smart/id6743222651)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is WORLD4SOLAR free?

WORLD4SOLAR is free to download, with no in-app purchases.

### Is OMMO Smart free?

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

### Do WORLD4SOLAR or OMMO Smart have ads?

Neither WORLD4SOLAR nor OMMO Smart shows ads.

### Which is updated more often, WORLD4SOLAR or OMMO Smart?

WORLD4SOLAR ships an update every 5 weeks, and OMMO Smart every 2 months. Most recently, WORLD4SOLAR was updated on September 9, 2026 and OMMO Smart on September 18, 2026.

---

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