# RayLab vs Gradiently

The clearest difference is in-app purchases: Gradiently at none against RayLab's 10. Gradiently also leads on ads (none vs shown) and rating (5.0 vs 4.6). RayLab's advantage is review sentiment (75% vs 50%) and update cadence (every 6 weeks vs every 5 months). On price and device support there is nothing between them.

Both are free to download. RayLab sells 10 in-app purchases, starting at $3.99 per month. Gradiently asks for nothing beyond the download.

Gradiently holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: RayLab has 63 ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 75% of RayLab's written reviews are positive against 50% of Gradiently's, so the app with the better star average is not the one people write more warmly about.

RayLab ships an update every 6 weeks, Gradiently every 5 months. The most recent releases landed on October 7, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | RayLab | Gradiently |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (63 ratings)](https://appshunter.io/ios/app/raylab/id710190065/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/gradiently-wallpaper-creator/id897414345/reviews)** |
| Number of ratings | **63** | 3 |
| Positive reviews | **75.0% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 6 weeks** | Every 5 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 39 MB | 9 MB |
| Requires iOS | **11.0** | 18.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Kamyar Ghandi](https://appshunter.io/developer/710190068) | [Christian Hatch](https://appshunter.io/developer/897414348) |

## What reviewers say

### RayLab

[App page](https://appshunter.io/ios/app/raylab/id710190065)

Design and simulate optical systems with this powerful tool. Explore 2D and 3D models, perform advanced ray tracing, and analyze optical performance. Ideal for learning or professional design.

**Highlights:** 2D/3D optical modeling, Geometric ray tracing, Sequential and non-sequential analysis, Advanced optical elements, Polarization ray tracing, Design optimization, Glass catalogs

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RayLab Pro Subscription | $3.99 | per month |
| RayLab Pro Upgrade | Free | one-time |
| Schott Glass Catalog | $0.99 | one-time |
| Custom Glass Editor | $0.99 | one-time |
| Advanced Optical Elements | $1.99 | one-time |
| Source and Lens Arrays | $1.99 | one-time |
| Solver/Optimizer Module | $3.99 | one-time |
| 3D Modeling | $4.99 | one-time |
| RayLab Pro 2 | $19.99 | one-time |
| RayLab Pro Bundle | $19.99 | one-time |


### Gradiently

[App page](https://appshunter.io/ios/app/gradiently-wallpaper-creator/id897414345)

Design unique gradient wallpapers with customizable colors and blends. Save or set them instantly to personalize your device. Explore color theory and create beautiful palettes.

**Highlights:** Generate unique gradients, Customize colors and blend, Save or set wallpapers instantly, Create custom color palettes, Learn color theory basics, Works on iPhone and iPad

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is RayLab free?

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

### Is Gradiently free?

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

### Which has better reviews, RayLab or Gradiently?

Gradiently is rated higher. RayLab averages 4.6 out of 5 from 63 ratings, while Gradiently averages 5.0 from 3 ratings.

### Do RayLab or Gradiently have ads?

RayLab shows ads; Gradiently does not.

### Which is updated more often, RayLab or Gradiently?

RayLab ships an update every 6 weeks, and Gradiently every 5 months. Most recently, RayLab was updated on October 7, 2026 and Gradiently on October 1, 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.*