OpenSolar vs Usiminas
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OpenSolar
This free application provides a comprehensive solution for designing and selling solar energy systems. It offers end-to-end functionality for solar professionals.
- End-to-end solar design
- Sales application
- Free to use
- Comprehensive functionality
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OpenSolar is the world's first free, end-to-end, solar design and sales application.
Usiminas
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A Extranet Mobile é mais um canal de interação entre Usiminas e seus Clientes.
Screenshots
Verdict
The clearest difference is iOS requirement: Usiminas at 11.0 against OpenSolar's 15.7. On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
OpenSolar ships an update every 6 weeks, Usiminas every 2 months. The most recent releases landed on September 5, 2026 and September 12, 2026 respectively.
| Parameter | OpenSolar | Usiminas |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (10 ratings) — better | — |
| Positive reviews | 45.5% of reviews | — |
| Number of ratings | 10 — better | — |
| Update frequency | Every 6 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.7 | 11.0 — better |
| Further details — not scored | ||
| Size | 216 MB | 47 MB |
| Age rating | 4+ | 4+ |
| Developer | OpenSolar Pty Ltd | Usinas Siderurgicas de Minas Gerais S.A. |
In-app purchases
OpenSolar
No in-app purchases
Usiminas
No in-app purchases
