# SPMS vs Solar Energy Forecast | Solev

The clearest difference is in-app purchases: SPMS at none against Solar Energy Forecast | Solev's 4. SPMS also leads on iOS requirement (8.1 vs 16.0). Solar Energy Forecast | Solev's advantage is update cadence (fortnightly vs every 11 months). On price, ads and device support 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. SPMS asks for nothing beyond the download.

SPMS ships an update every 11 months, Solar Energy Forecast | Solev fortnightly. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | SPMS | 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 | Every 11 months | **Fortnightly** |
| Monetization | — | Free with in-app purchases |
| Size | 51 MB | 58 MB |
| Requires iOS | **8.1** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Advantech](https://appshunter.io/developer/413213069) | [Solev UG (haftungsbeschrnkt)](https://appshunter.io/developer/1814395658) |

## What reviewers say

### SPMS

[App page](https://appshunter.io/ios/app/spms/id1278902005)

**Features:** macOS Compatibility

**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 SPMS free?

SPMS 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 SPMS or Solar Energy Forecast | Solev have ads?

Neither SPMS nor Solar Energy Forecast | Solev shows ads.

### Which is updated more often, SPMS or Solar Energy Forecast | Solev?

SPMS ships an update every 11 months, and Solar Energy Forecast | Solev fortnightly. Most recently, SPMS was updated on October 26, 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.*