# Grace 4 vs 3D Virtual Cell

The clearest difference is price: 3D Virtual Cell at $4.99 against Grace 4's $39.99. 3D Virtual Cell also leads on review sentiment (100% vs 56%) and rating (5.0 vs 4.6). Grace 4's advantage is update cadence (every 8 months vs every 90 months) and ratings volume (44 vs 1). On ads, in-app purchases, monetization model and device support there is nothing between them.

Grace 4 costs $39.99 and 3D Virtual Cell $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

3D Virtual Cell holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Grace 4 has 44 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 56% of Grace 4's written reviews are positive against 100% of 3D Virtual Cell's.

Grace 4 ships an update every 8 months, 3D Virtual Cell every 90 months. The most recent releases landed on October 15, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Grace 4 | 3D Virtual Cell |
| --- | --- | --- |
| Price | $39.99 | **$4.99** |
| Rating | [4.6 (44 ratings)](https://appshunter.io/ios/app/grace-4/id360574688/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/3d-virtual-cell/id1451330223/reviews)** |
| Number of ratings | **44** | 1 |
| Positive reviews | 55.6% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 8 months** | Every 90 months |
| Monetization | Paid | Paid |
| Size | 17 MB | 139 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Steven Troughton-Smith](https://appshunter.io/developer/286133549) | [Biosphera](https://appshunter.io/developer/569303204) |

## What reviewers say

### Grace 4

[App page](https://appshunter.io/ios/app/grace-4/id360574688)

This app facilitates communication for individuals with speech disabilities using a picture exchange system. Users can select images to build sentences, share them with communication partners, and customize content with their own photos and labels. It supports vocal output and offers adjustable settings for various needs.

**Highlights:** Picture exchange communication, Customizable image library, Sentence strip creation, Optional vocal output, Fullscreen sentence view, Adjustable card sizes

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use interface
- 💡 Great for visual learners
- 👍 Flexible customization options
- 👍 Useful for non-verbal individuals
- 👍 Good PECS alternative

**What reviewers complain about**

- 👎 Lacks voice output
- 👎 Limited built-in content
- 👎 High price for functionality
- 👎 Not user-friendly for some
- 👎 Can be confusing initially

**Reported bugs**

- App flashing on and off
- App closes unexpectedly
- Cannot see pictures when clicking icon headers
- Imported pictures show on top of each other
- Issues with adding own categories

**Requested features**

- Ability to record own voice
- Add own categories
- Remove existing categories
- More cards/images
- Add own cards to existing categories


### 3D Virtual Cell

[App page](https://appshunter.io/ios/app/3d-virtual-cell/id1451330223)

Explore interactive 3D models of various cells and biological structures. Ideal for high school cytology classes, this app offers detailed views of animal cells, plant cells, bacteria, viruses, and DNA. Navigate and learn through intuitive touch controls.

**Highlights:** Interactive 3D cell models, Animal cell, plant cell, euglena, paramecium, bacteria, Virus and DNA molecule models, Multi-language support (English, Spanish, Portuguese), Intuitive touch controls for navigation and manipulation, High school cytology curriculum assistance

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Grace 4 free?

Grace 4 costs $39.99, with no in-app purchases.

### Is 3D Virtual Cell free?

3D Virtual Cell costs $4.99, with no in-app purchases.

### Which has better reviews, Grace 4 or 3D Virtual Cell?

3D Virtual Cell is rated higher. Grace 4 averages 4.6 out of 5 from 44 ratings, while 3D Virtual Cell averages 5.0 from 1 ratings.

### Do Grace 4 or 3D Virtual Cell have ads?

Neither Grace 4 nor 3D Virtual Cell shows ads.

### Which is updated more often, Grace 4 or 3D Virtual Cell?

Grace 4 ships an update every 8 months, and 3D Virtual Cell every 90 months. Most recently, Grace 4 was updated on October 15, 2026 and 3D Virtual Cell on October 4, 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.*