# Smart Solar vs TXD

The clearest difference is update cadence: TXD at every 10 days against Smart Solar's every 6 weeks. Smart Solar's advantage is iOS requirement (12.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

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

Smart Solar ships an update every 6 weeks, TXD every 10 days. The most recent releases landed on October 3, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Smart Solar | TXD |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 10 days** |
| Monetization | Free | — |
| Size | 30 MB | 66 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Anh Tuan Nguyen](https://appshunter.io/developer/1782902125) | [Vu Tam](https://appshunter.io/developer/1877834720) |

## What reviewers say

### Smart Solar

[App page](https://appshunter.io/ios/app/smart-solar/id6738919484)

Monitor and manage your solar energy devices with this application. It currently supports specific MPPT chargers and inverters, providing insights into your solar energy system's performance.

**Highlights:** Solar device management, Energy monitoring, MPPT Charger support, Inverter GTIL2-Sun support, Performance insights

**Features:** macOS Compatibility

**In-app purchases:** none


### TXD

[App page](https://appshunter.io/ios/app/txd/id6759277457)

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

**In-app purchases:** none


## Frequently asked questions

### Is Smart Solar free?

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

### Is TXD free?

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

### Do Smart Solar or TXD have ads?

Neither Smart Solar nor TXD shows ads.

### Which is updated more often, Smart Solar or TXD?

Smart Solar ships an update every 6 weeks, and TXD every 10 days. Most recently, Smart Solar was updated on October 3, 2026 and TXD on October 8, 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.*