# Website Speed vs SunStem

The clearest difference is ads: SunStem at none against Website Speed's shown. SunStem also leads on update cadence (weekly vs every 4 months). Website Speed's advantage is iOS requirement (12.0 vs 17.0). On price, 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.

Website Speed ships an update every 4 months, SunStem weekly. The most recent releases landed on October 10, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Website Speed | SunStem |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Weekly** |
| Size | 26 MB | 7 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Ecosoft di Alessandro Savoiardo](https://appshunter.io/developer/529677092) | [Dmitriy Motorin](https://appshunter.io/developer/1495533596) |

## What reviewers say

### Website Speed

[App page](https://appshunter.io/ios/app/website-speed/id993437990)

**Features:** macOS Compatibility

**In-app purchases:** none


### SunStem

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Website Speed free?

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

### Is SunStem free?

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

### Do Website Speed or SunStem have ads?

Website Speed shows ads; SunStem does not.

### Which is updated more often, Website Speed or SunStem?

Website Speed ships an update every 4 months, and SunStem weekly. Most recently, Website Speed was updated on October 10, 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.*