# SunArc vs Solar

The clearest difference is in-app purchases: Solar at none against SunArc's 1. SunArc's advantage is iOS requirement (16.4 vs 26.2). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. SunArc sells 1 one-off in-app purchase. Solar asks for nothing beyond the download.

SunArc ships an update every 3 weeks, Solar every 4 weeks. Both last shipped on November 10, 2026.

## The numbers

| Metric | SunArc | Solar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/solar-check/id6815614368/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 4 weeks |
| Monetization | — | Free |
| Size | 50 MB | 8 MB |
| Requires iOS | **16.4** | 26.2 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Pascal von Burg](https://appshunter.io/developer/6797637525) | [Gerhard Lentschik](https://appshunter.io/developer/629988041) |

## What reviewers say

### SunArc

[App page](https://appshunter.io/ios/app/sunarc-sun-path-and-shade-check/id6797637523)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ShadeCheck Unlock | $0.99 | one-time |


### Solar

[App page](https://appshunter.io/ios/app/solar-check/id6815614368)

Estimate your photovoltaic system's energy output with detailed solar radiation and weather forecasts. Input your system's specifications to receive personalized output calculations and historical data for any location.

**Highlights:** PV output calculation, Historical solar radiation, 7-day solar radiation forecast, System size, orientation, pitch input, Sunshine duration and cloud cover, Hourly solar radiation details

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

**In-app purchases:** none


## Frequently asked questions

### Is SunArc free?

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

### Is Solar free?

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

### Do SunArc or Solar have ads?

Neither SunArc nor Solar shows ads.

### Which is updated more often, SunArc or Solar?

SunArc ships an update every 3 weeks, and Solar every 4 weeks. Most recently, SunArc was updated on November 10, 2026 and Solar on November 10, 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.*