# Solar PV System Designer vs Certly

The clearest difference is in-app purchases: Solar PV System Designer at none against Certly's 2. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Certly sells 2 in-app purchases, starting at $19.99 per month. Solar PV System Designer asks for nothing beyond the download.

Solar PV System Designer ships an update weekly, Certly every 8 days. The most recent releases landed on October 17, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Solar PV System Designer | Certly |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 8 days |
| Size | 222 MB | 43 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Cepoi Mario](https://appshunter.io/developer/1575099437) | [Certly](https://appshunter.io/developer/6773146065) |

## What reviewers say

### Solar PV System Designer

[App page](https://appshunter.io/ios/app/solar-pv-system-designer/id6755193110)

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

**In-app purchases:** none


### Certly

[App page](https://appshunter.io/ios/app/certly/id6773146063)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Certly Pro - Monthly | $19.99 | per month |
| Certly Pro - Annual | $199.99 | per year |


## Frequently asked questions

### Is Solar PV System Designer free?

Solar PV System Designer is free to download, with no in-app purchases.

### Is Certly free?

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

### Do Solar PV System Designer or Certly have ads?

Neither Solar PV System Designer nor Certly shows ads.

### Which is updated more often, Solar PV System Designer or Certly?

Solar PV System Designer ships an update weekly, and Certly every 8 days. Most recently, Solar PV System Designer was updated on October 17, 2026 and Certly on October 22, 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.*