# Sun Map Clock vs Solar Shading Survey

The clearest difference is update cadence: Sun Map Clock at fortnightly against Solar Shading Survey's monthly. Sun Map Clock also leads on iOS requirement (15.0 vs 17.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Sun Map Clock sells 2 in-app purchases, starting at $15.00 per month and Solar Shading Survey sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

Sun Map Clock ships an update fortnightly, Solar Shading Survey monthly. The most recent releases landed on October 14, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Sun Map Clock | Solar Shading Survey |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Monthly |
| Size | 74 MB | 40 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [QAEE CONPUUTENG](https://appshunter.io/developer/1853582855) | [Frederic Billon](https://appshunter.io/developer/1811407676) |

## What reviewers say

### Sun Map Clock

[App page](https://appshunter.io/ios/app/sun-map-clock-shadow-tracker/id6765796926)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $15.00 | per month |
| Yearly Subscription | $150.00 | per year |


### Solar Shading Survey

[App page](https://appshunter.io/ios/app/solar-shading-survey/id6785455749)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $3.99 | per month |
| Pro | $24.99 | per year |


## Frequently asked questions

### Is Sun Map Clock free?

Sun Map Clock is free to download, with in-app purchases available.

### Is Solar Shading Survey free?

Solar Shading Survey is free to download, with in-app purchases available.

### Do Sun Map Clock or Solar Shading Survey have ads?

Neither Sun Map Clock nor Solar Shading Survey shows ads.

### Which is updated more often, Sun Map Clock or Solar Shading Survey?

Sun Map Clock ships an update fortnightly, and Solar Shading Survey monthly. Most recently, Sun Map Clock was updated on October 14, 2026 and Solar Shading Survey on October 7, 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.*