Comparison

OpenSolar vs Reonic

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

Head to head

OpenSolar

Free

💼 Business

★ 4.410 ratingsView app →

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.

About

Reonic

Features

Read full description

All the most important Reonic functions, now also as an app: calendar, requests, offers, notes and files. And of course the heatload calculation.

Screenshots

OpenSolar3 screens

Reonic4 screens

Verdict

The call

OpenSolar and Reonic are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

OpenSolar ships an update every 6 weeks, Reonic every 4 weeks. The most recent releases landed on September 5, 2026 and September 13, 2026 respectively.

ScorecardNo meaningful differences

OpenSolar versus Reonic: the parameters behind the verdict, then further details
Parameter	OpenSolar	Reonic
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	Every 4 weeks — better
Ads	No	No
In-app purchases	No	No
Monetization	Free	—
Devices	iPhone, iPad, iPod	iPhone, iPad, iPod
Requires iOS	15.7	15.5 — better
Further details — not scored
Size	216 MB	118 MB
Age rating	4+	4+
Developer	OpenSolar Pty Ltd	Reonic GmbH

In-app purchases

None

OpenSolar

No in-app purchases

None

Reonic

No in-app purchases

Questions

Is OpenSolar free?

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

Is Reonic free?

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

Do OpenSolar or Reonic have ads?

Neither OpenSolar nor Reonic shows ads.

Which is updated more often, OpenSolar or Reonic?

OpenSolar ships an update every 6 weeks, and Reonic every 4 weeks. Most recently, OpenSolar was updated on September 5, 2026 and Reonic on September 13, 2026.