# LTB Solar vs Mars Rock E

The clearest difference is iOS requirement: LTB Solar at 12.0 against Mars Rock E's 15.5. On price, update cadence, ads and in-app purchases there is nothing between them.

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

LTB Solar ships an update every 3 weeks, Mars Rock E monthly. The most recent releases landed on June 9, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | LTB Solar | Mars Rock E |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/ltb-solar/id6473835053/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Free | — |
| Size | 30 MB | 22 MB |
| Requires iOS | **12.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Guangzhou Limu Electronic Science & Technology Co., Ltd.](https://appshunter.io/developer/1798913280) | [Xiamen Mars Rock Science Technology Co.,Ltd](https://appshunter.io/developer/1787113189) |

## What reviewers say

### LTB Solar

[App page](https://appshunter.io/ios/app/ltb-solar/id6473835053)

Control your solar power system remotely via Bluetooth. Monitor solar panel, battery, and load status, along with controller information. Adjust battery and load parameters for optimal performance.

**Highlights:** Bluetooth connectivity, Solar panel status monitoring, Battery status monitoring, Load status monitoring, Controller information display, Battery parameter adjustment, Load parameter adjustment

**Features:** macOS Compatibility

**In-app purchases:** none


### Mars Rock E

[App page](https://appshunter.io/ios/app/mars-rock-e/id6739800863)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is LTB Solar free?

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

### Is Mars Rock E free?

Mars Rock E is free to download, with no in-app purchases.

### Do LTB Solar or Mars Rock E have ads?

Neither LTB Solar nor Mars Rock E shows ads.

### Which is updated more often, LTB Solar or Mars Rock E?

LTB Solar ships an update every 3 weeks, and Mars Rock E monthly. Most recently, LTB Solar was updated on June 9, 2026 and Mars Rock E on September 15, 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.*