# PVLevel vs SunStem

The clearest difference is in-app purchases: SunStem at none against PVLevel's 2. SunStem also leads on ads (none vs shown) and update cadence (weekly vs every 2 months). PVLevel's advantage is iOS requirement (15.1 vs 17.0). On price and device support there is nothing between them.

Both are free to download. PVLevel sells 2 in-app purchases, starting at $2.99 per month. SunStem asks for nothing beyond the download.

PVLevel ships an update every 2 months, SunStem weekly. The most recent releases landed on October 9, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | PVLevel | SunStem |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Weekly** |
| Size | 70 MB | 7 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [TMB Solar Limited](https://appshunter.io/developer/1872134358) | [Dmitriy Motorin](https://appshunter.io/developer/1495533596) |

## What reviewers say

### PVLevel

[App page](https://appshunter.io/ios/app/pvlevel/id6759517924)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Pro | $2.99 | per month |
| Yearly Pro | $17.99 | per year |


### SunStem

[App page](https://appshunter.io/ios/app/sunstem-solar-calculator/id6787007719)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PVLevel free?

PVLevel is free to download, with in-app purchases available.

### Is SunStem free?

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

### Do PVLevel or SunStem have ads?

PVLevel shows ads; SunStem does not.

### Which is updated more often, PVLevel or SunStem?

PVLevel ships an update every 2 months, and SunStem weekly. Most recently, PVLevel was updated on October 9, 2026 and SunStem on October 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.*