# OD Link系统 vs Solar Energy Forecast | Solev

The clearest difference is in-app purchases: OD Link系统 at none against Solar Energy Forecast | Solev's 4. Solar Energy Forecast | Solev's advantage is update cadence (fortnightly vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Solar Energy Forecast | Solev sells 4 in-app purchases, starting at $3.99 per month. OD Link系统 asks for nothing beyond the download.

OD Link系统 ships an update monthly, Solar Energy Forecast | Solev fortnightly. The most recent releases landed on October 19, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | OD Link系统 | Solar Energy Forecast | Solev |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/solar-energy-forecast-solev/id6745899738/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | — | Free with in-app purchases |
| Size | 56 MB | 58 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ChengLu Education Technology (Hubei) Co., Ltd.](https://appshunter.io/developer/1557843667) | [Solev UG (haftungsbeschrnkt)](https://appshunter.io/developer/1814395658) |

## What reviewers say

### OD Link系统

[App page](https://appshunter.io/ios/app/od-link/id1633922510)

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

**In-app purchases:** none


### Solar Energy Forecast | Solev

[App page](https://appshunter.io/ios/app/solar-energy-forecast-solev/id6745899738)

Optimize your solar energy usage and reduce your carbon footprint. Plan new photovoltaic systems or maximize the efficiency of existing ones by forecasting energy production and planning energy-demanding tasks.

**Highlights:** Forecast solar power and energy output, Calculate yearly yield and payback period, Optimize energy consumption, Digital twin of solar plant, Optimal tilt angle recommendations, Track past energy production

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly subscription | $3.99 | per month |
| Annual subscription | $12.99 | per year |
| Business Monthly | $45.00 | per month |
| Business Annual | $449.00 | per year |


## Frequently asked questions

### Is OD Link系统 free?

OD Link系统 is free to download, with no in-app purchases.

### Is Solar Energy Forecast | Solev free?

Solar Energy Forecast | Solev is free to download, with in-app purchases available.

### Do OD Link系统 or Solar Energy Forecast | Solev have ads?

Neither OD Link系统 nor Solar Energy Forecast | Solev shows ads.

### Which is updated more often, OD Link系统 or Solar Energy Forecast | Solev?

OD Link系统 ships an update monthly, and Solar Energy Forecast | Solev fortnightly. Most recently, OD Link系统 was updated on October 19, 2026 and Solar Energy Forecast | Solev on October 24, 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.*