# PV vs Solar

The clearest difference is update cadence: PV at every 4 days against Solar's every 2 months. 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.

PV ships an update every 4 days, Solar every 2 months. The most recent releases landed on October 27, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | PV | Solar |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 2 months |
| Size | 10 MB | 32 MB |
| Requires iOS | 12.4 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Suzhou Radiant Photovoltaic Technology Co., Ltd](https://appshunter.io/developer/1630691682) | [厦门蓝旭科技有限公司](https://appshunter.io/developer/1722214713) |

## What reviewers say

### PV

[App page](https://appshunter.io/ios/app/pv-robot/id6450347047)

**Features:** macOS Compatibility

**In-app purchases:** none


### Solar

[App page](https://appshunter.io/ios/app/solar-lit-scada/id6474659001)

**In-app purchases:** none


## Frequently asked questions

### Is PV free?

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

### Is Solar free?

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

### Do PV or Solar have ads?

Neither PV nor Solar shows ads.

### Which is updated more often, PV or Solar?

PV ships an update every 4 days, and Solar every 2 months. Most recently, PV was updated on October 27, 2026 and Solar 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.*