# sun vs CellWalk

The clearest difference is rating: CellWalk at 4.8 against sun's 3.9. CellWalk also leads on review sentiment (92% vs 50%) and update cadence (every 2 weeks vs every 2 months). sun's advantage is in-app purchases (none vs 3) and iOS requirement (13.0 vs 27.0). On price, ads and device support there is nothing between them.

Both are free to download. CellWalk sells 3 in-app purchases, starting at $9.99 per month. sun asks for nothing beyond the download.

CellWalk holds the better App Store score, 4.8 against 3.9. That said, the two scores are not equally well evidenced: CellWalk has 74 ratings behind it against 10, so its average is the more settled of the two. Written reviews point the same way: 50% of sun's written reviews are positive against 92% of CellWalk's.

sun ships an update every 2 months, CellWalk every 2 weeks. The most recent releases landed on November 3, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | sun | CellWalk |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (10 ratings)](https://appshunter.io/ios/app/sun-a-wear/id1517217767/reviews) | **[4.8 (74 ratings)](https://appshunter.io/ios/app/cellwalk/id1627776848/reviews)** |
| Number of ratings | 10 | **74** |
| Positive reviews | 50.0% of reviews | **91.7% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | **Free** | Freemium |
| Size | 39 MB | 555 MB |
| Requires iOS | **13.0** | 27.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, Mac, Vision Pro** |
| Age rating | 12+ | 12+ |
| Developer | [Samuel Welten](https://appshunter.io/developer/1517217766) | [Ako Biotica Inc.](https://appshunter.io/developer/1895703608) |

## What reviewers say

### sun

[App page](https://appshunter.io/ios/app/sun-a-wear/id1517217767)

This application works with a wearable sensor to monitor UV radiation exposure. It provides personalized protective suggestions and tracks your accumulated daily dose. You can set a personal UV limit and receive alerts when it's reached.

**Highlights:** UV radiation measurement, Personalized protective suggestions, Daily accumulated radiation tracking, Customizable UV dose limits, UV dose limit alerts

**Features:** macOS Compatibility

**In-app purchases:** none


### CellWalk

[App page](https://appshunter.io/ios/app/cellwalk/id1627776848)

Explore a living cell in 3D, from whole organisms down to atoms. An AI tutor guides your learning with interactive lessons and detailed explanations of molecular structures. Features augmented reality for an immersive educational experience.

**Highlights:** 3D cell exploration, Molecular-level detail, AI-powered tutor (Ako), Augmented reality visualization, Interactive learning paths, Guided tours, Siri integration

**Features:** iPhone Duo support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CellWalk Pro Monthly | $9.99 | per month |
| CellWalk Pro Annual | $79.99 | per year |
| Pro Lessons | $39.99 | one-time |

**What reviewers like**

- ✨ Stunning visualizations
- 🔬 Incredible detail
- 🧠 Informative content
- 👍 Easy to use
- 🚀 Smooth performance

**What reviewers complain about**

- ⚠️ Misleading information
- 📚 Limited content
- 🖼️ Tiny window view
- 😵 Nauseating renderer
- 🐛 Buggy performance

**Reported bugs**

- ATP synthase described backwards
- Renderer noise causes nausea
- Buggy and low framerate
- Renderer not responsive to head movements

**Requested features**

- More cells to explore (eukaryotic, mammalian, computer cells)
- More content and depth
- Expand on descriptions with an 'expand on' feature
- Add tutorials for new users
- Add color to highlighted text for easy reference


## Frequently asked questions

### Is sun free?

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

### Is CellWalk free?

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

### Which has better reviews, sun or CellWalk?

CellWalk is rated higher. sun averages 3.9 out of 5 from 10 ratings, while CellWalk averages 4.8 from 74 ratings.

### Do sun or CellWalk have ads?

Neither sun nor CellWalk shows ads.

### Which is updated more often, sun or CellWalk?

sun ships an update every 2 months, and CellWalk every 2 weeks. Most recently, sun was updated on November 3, 2026 and CellWalk on November 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.*