# Spatial Vis vs Professor Index

The clearest difference is review sentiment: Professor Index at 88% against Spatial Vis's 27%. Professor Index also leads on rating (4.5 vs 3.4) and ratings volume (59 vs 18). Spatial Vis's advantage is update cadence (every 5 days vs monthly). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Professor Index holds the better App Store score, 4.5 against 3.4. Both are backed by a comparable volume of ratings — 18 and 59 respectively. Written reviews point the same way: 27% of Spatial Vis's written reviews are positive against 88% of Professor Index's.

Spatial Vis ships an update every 5 days, Professor Index monthly. Both last shipped on September 30, 2026.

## The numbers

| Metric | Spatial Vis | Professor Index |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.4 (18 ratings)](https://appshunter.io/ios/app/spatial-vis/id1495249170/reviews) | **[4.5 (59 ratings)](https://appshunter.io/ios/app/professor-index/id6476449470/reviews)** |
| Number of ratings | 18 | **59** |
| Positive reviews | 26.9% of reviews | **88.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 days** | Monthly |
| Monetization | Free | Free |
| Size | 50 MB | 57 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [eGrove Education, Inc.](https://appshunter.io/developer/1126228424) | [Professor Index, LLC](https://appshunter.io/developer/1725377550) |

## What reviewers say

### Spatial Vis

[App page](https://appshunter.io/ios/app/spatial-vis/id1495249170)

This app trains students in engineering and science to improve their freehand sketching of 2D and 3D views. Mastering these skills enhances technical communication and spatial visualization, which can lead to better academic performance. It offers interactive lessons and automatic grading for assignments.

**Highlights:** Freehand sketching of 2D and 3D views, Orthographic projections lessons, 3D object rotations, Flat pattern sketching, Automatic sketch grading, Gamified learning with hints

**Features:** macOS Compatibility

**In-app purchases:** none


### Professor Index

[App page](https://appshunter.io/ios/app/professor-index/id6476449470)

This app allows college students to rate and review professors and courses, providing insights into teaching effectiveness and course relevance. Students can compare professor profiles and make informed enrollment decisions based on peer feedback.

**Highlights:** Rate and review professors, Get feedback on future professors, Compare professor profiles, Make data-informed enrollment decisions, Gamified review incentives

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Spatial Vis free?

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

### Is Professor Index free?

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

### Which has better reviews, Spatial Vis or Professor Index?

Professor Index is rated higher. Spatial Vis averages 3.4 out of 5 from 18 ratings, while Professor Index averages 4.5 from 59 ratings.

### Do Spatial Vis or Professor Index have ads?

Neither Spatial Vis nor Professor Index shows ads.

### Which is updated more often, Spatial Vis or Professor Index?

Spatial Vis ships an update every 5 days, and Professor Index monthly. Most recently, Spatial Vis was updated on September 30, 2026 and Professor Index on September 30, 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.*