# HPV Series Control vs Simple Solar

The clearest difference is in-app purchases: HPV Series Control at none against Simple Solar's 4. Simple Solar's advantage is update cadence (every 3 weeks vs every 13 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Simple Solar sells 4 in-app purchases, starting at $6.99 per month. HPV Series Control asks for nothing beyond the download.

HPV Series Control ships an update every 13 months, Simple Solar every 3 weeks. The most recent releases landed on October 8, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | HPV Series Control | Simple Solar |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 3 weeks** |
| Size | 46 MB | 73 MB |
| Requires iOS | **15.1** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Total Home Environment Ltd](https://appshunter.io/developer/1535462049) | [Minutia Mobile](https://appshunter.io/developer/1446213585) |

## What reviewers say

### HPV Series Control

[App page](https://appshunter.io/ios/app/hpv-series-control/id1535462047)

**Features:** macOS Compatibility

**In-app purchases:** none


### Simple Solar

[App page](https://appshunter.io/ios/app/simple-solar/id6743857767)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Automation | $6.99 | per month |
| Yearly Subscription | $59.00 | per year |
| Remove Ads | $2.99 | one-time |
| Remove Ad's | $2.99 | one-time |


## Frequently asked questions

### Is HPV Series Control free?

HPV Series Control is free to download, with no in-app purchases.

### Is Simple Solar free?

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

### Do HPV Series Control or Simple Solar have ads?

Neither HPV Series Control nor Simple Solar shows ads.

### Which is updated more often, HPV Series Control or Simple Solar?

HPV Series Control ships an update every 13 months, and Simple Solar every 3 weeks. Most recently, HPV Series Control was updated on October 8, 2026 and Simple Solar on October 20, 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.*