Comparison

Solar vs OpenSolar

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head

★ 4.410 ratingsView app →

About

Solar

Features

Read full description

Design Solar photovoltaic System Solar Calories is a Mobile App created by the Ministry of Energy & Industry, this app helps you to design a basic Solar PV System for their house or property. Solar Calories help you to know the size of: 1- The PV modules 2- The Inverter 3- The Battery 4- Solar charge controller

About

OpenSolar

This free application provides a comprehensive solution for designing and selling solar energy systems. It offers end-to-end functionality for solar professionals.

Highlights

End-to-end solar design
Sales application
Free to use
Comprehensive functionality

Features

Read full description

OpenSolar is the world's first free, end-to-end, solar design and sales application.

Screenshots

Solar3 screens

OpenSolar3 screens

Verdict

The call

The clearest difference is update cadence: OpenSolar at every 6 weeks against Solar's every 6 months. Solar's advantage is iOS requirement (10.0 vs 15.7). On price, ads, in-app purchases and device support 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Solar ships an update every 6 months, OpenSolar every 6 weeks. The most recent releases landed on October 26, 2026 and November 2, 2026 respectively.

Scorecard2 real differences · 8 level

Solar versus OpenSolar: the parameters behind the verdict, then further details
Parameter	Solar	OpenSolar
Price	Free	Free
Rating	—	4.4 (10 ratings) — better
Positive reviews	—	45.5% of reviews
Number of ratings	—	10 — better
Update frequency	Every 6 months	Every 6 weeks — better
Ads	No	No
In-app purchases	No	No
Monetization	—	Free
Devices	iPhone, iPod	iPhone, iPad, iPod — better
Requires iOS	10.0 — better	15.7
Further details — not scored
Size	53 MB	216 MB
Age rating	4+	4+
Developer	Ministry of Energy UAE	OpenSolar Pty Ltd

In-app purchases

None

Solar

No in-app purchases

None

OpenSolar

No in-app purchases

Questions

Is Solar free?

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

Is OpenSolar free?

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

Do Solar or OpenSolar have ads?

Neither Solar nor OpenSolar shows ads.

Which is updated more often, Solar or OpenSolar?

Solar ships an update every 6 months, and OpenSolar every 6 weeks. Most recently, Solar was updated on October 26, 2026 and OpenSolar on November 2, 2026.