# OTPL Solar vs Engelect

The clearest difference is in-app purchases: OTPL Solar at none against Engelect's 3. OTPL Solar also leads on iOS requirement (13.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. Engelect sells 3 in-app purchases, starting at $0.99 per 7 days. OTPL Solar asks for nothing beyond the download.

## The numbers

| Metric | OTPL Solar | Engelect |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | — |
| Size | 58 MB | 94 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [AHASOLAR TECHNOLOGIES LIMITED](https://appshunter.io/developer/1632224285) | [Joel POUDIOUGOU](https://appshunter.io/developer/1851287821) |

## What reviewers say

### OTPL Solar

[App page](https://appshunter.io/ios/app/otpl-solar/id1489169580)

**In-app purchases:** none


### Engelect

[App page](https://appshunter.io/ios/app/engelect-solar-power-sizer/id6755126795)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium – Weekly | $0.99 | per 7 days |
| Premium - Monthly | $3.99 | per month |
| Premium – Yearly | $29.99 | per year |


## Frequently asked questions

### Is OTPL Solar free?

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

### Is Engelect free?

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

### Do OTPL Solar or Engelect have ads?

Neither OTPL Solar nor Engelect shows ads.

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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.*