# SolarApp vs Sunio

The clearest difference is in-app purchases: Sunio at none against SolarApp's 1. Sunio also leads on update cadence (every 5 days vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

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

SolarApp ships an update every 3 months, Sunio every 5 days. The most recent releases landed on November 5, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | SolarApp | Sunio |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (10 ratings)](https://appshunter.io/ios/app/sunio-sun-tracker-3d-shadow/id6753144445/reviews)** |
| Number of ratings | — | **10** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 days** |
| Monetization | — | Free |
| Size | 9 MB | 34 MB |
| Requires iOS | **17.6** | 18 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Tapclay](https://appshunter.io/developer/626120638) | [Daniel Slave](https://appshunter.io/developer/1126366753) |

## What reviewers say

### SolarApp

[App page](https://appshunter.io/ios/app/solarapp-sun-and-shade-tracker/id6752802172)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Pack | $1.99 | one-time |


### Sunio

[App page](https://appshunter.io/ios/app/sunio-sun-tracker-3d-shadow/id6753144445)

Visualize the sun's path and its impact on terrain in 3D. Plan photography, evaluate property sunlight, and optimize solar panel placement with accurate, animated lighting and shadow simulations.

**Highlights:** 3D animated sunlight and shadow simulation, Augmented Reality sun path overlay, Precise golden hour and twilight times, Property sun exposure analysis, Solar panel optimization tools, Interactive time scrubbing

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

**In-app purchases:** none


## Frequently asked questions

### Is SolarApp free?

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

### Is Sunio free?

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

### Do SolarApp or Sunio have ads?

Neither SolarApp nor Sunio shows ads.

### Which is updated more often, SolarApp or Sunio?

SolarApp ships an update every 3 months, and Sunio every 5 days. Most recently, SolarApp was updated on November 5, 2026 and Sunio on November 8, 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.*