# Electrical Tools & Reference vs Solar PV System Designer

The clearest difference is in-app purchases: Solar PV System Designer at none against Electrical Tools & Reference's 2. Solar PV System Designer also leads on update cadence (weekly vs every 3 weeks). Electrical Tools & Reference's advantage is iOS requirement (12.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. Electrical Tools & Reference sells 2 in-app purchases, starting at $2.99 per month. Solar PV System Designer asks for nothing beyond the download.

Electrical Tools & Reference ships an update every 3 weeks, Solar PV System Designer weekly. The most recent releases landed on October 19, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Electrical Tools & Reference | Solar PV System Designer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Size | 88 MB | 222 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ashvin Kevadiya](https://appshunter.io/developer/1756324971) | [Cepoi Mario](https://appshunter.io/developer/1575099437) |

## What reviewers say

### Electrical Tools & Reference

[App page](https://appshunter.io/ios/app/electrical-tools-and-reference/id6746714702)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $2.99 | per month |
| Lifetime Premium | $3.99 | one-time |


### 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


## Frequently asked questions

### Is Electrical Tools & Reference free?

Electrical Tools & Reference is free to download, with in-app purchases available.

### Is Solar PV System Designer free?

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

### Do Electrical Tools & Reference or Solar PV System Designer have ads?

Neither Electrical Tools & Reference nor Solar PV System Designer shows ads.

### Which is updated more often, Electrical Tools & Reference or Solar PV System Designer?

Electrical Tools & Reference ships an update every 3 weeks, and Solar PV System Designer weekly. Most recently, Electrical Tools & Reference was updated on October 19, 2026 and Solar PV System Designer on October 17, 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.*