# Y+ Calculator vs Design Materials

The clearest difference is rating: Design Materials at 4.5 against Y+ Calculator's 3.0. Design Materials also leads on review sentiment (33% vs 0%) and update cadence (every 3 months vs every 8 months). Y+ Calculator's advantage is in-app purchases (none vs 3) and iOS requirement (9.0 vs 18.6). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Design Materials sells 3 in-app purchases, starting at $7.99 per month. Y+ Calculator asks for nothing beyond the download.

Design Materials holds the better App Store score, 4.5 against 3.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews point the same way: 0% of Y+ Calculator's written reviews are positive against 33% of Design Materials's.

Y+ Calculator ships an update every 8 months, Design Materials every 3 months. The most recent releases landed on October 4, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Y+ Calculator | Design Materials |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (1 ratings)](https://appshunter.io/ios/app/y-plus-calculator/id650011524/reviews) | **[4.5 (2 ratings)](https://appshunter.io/ios/app/design-materials/id975764691/reviews)** |
| Number of ratings | 1 | **2** |
| Positive reviews | 0.0% of reviews | **33.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 3 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 18 MB | 28 MB |
| Requires iOS | **9.0** | 18.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Cadence Design Systems, Inc.](https://appshunter.io/developer/1318385448) | [Chrystian Enriquez](https://appshunter.io/developer/428286625) |

## What reviewers say

### Y+ Calculator

[App page](https://appshunter.io/ios/app/y-plus-calculator/id650011524)

This app calculates the necessary grid spacing for computational fluid dynamics (CFD) simulations. It helps engineers determine near-wall cell height for accurate viscous flow computations. Supports both SI and Imperial units.

**Highlights:** Calculate grid spacing for target y+ values, Supports viscous CFD computations, Works in SI or Imperial units, Resets to sea-level conditions, Based on established fluid mechanics theory

**Features:** macOS Compatibility

**In-app purchases:** none


### Design Materials

[App page](https://appshunter.io/ios/app/design-materials/id975764691)

This app serves as an offline reference guide for various design materials, including polymers and metals. It allows users to manage their own material data, view 3D models, and capture objects with their device's camera. Ideal for professionals and hobbyists involved in product design and 3D printing.

**Highlights:** Offline material reference guide, Custom material and resin management, 3D model viewer and import/export, Object capture via device camera, Favorites and notes section, Cross-device compatibility (iOS, macOS)

**Features:** Family Sharing, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Bronze member | $7.99 | per month |
| Silver member | $17.99 | per 3 months |
| Gold member | $49.99 | per year |


## Frequently asked questions

### Is Y+ Calculator free?

Y+ Calculator is free to download, with no in-app purchases.

### Is Design Materials free?

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

### Which has better reviews, Y+ Calculator or Design Materials?

Design Materials is rated higher. Y+ Calculator averages 3.0 out of 5 from 1 ratings, while Design Materials averages 4.5 from 2 ratings.

### Do Y+ Calculator or Design Materials have ads?

Neither Y+ Calculator nor Design Materials shows ads.

### Which is updated more often, Y+ Calculator or Design Materials?

Y+ Calculator ships an update every 8 months, and Design Materials every 3 months. Most recently, Y+ Calculator was updated on October 4, 2026 and Design Materials on October 2, 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.*