# Crystal vs Zeus Material Management

The clearest difference is rating: Crystal at 5.0 against Zeus Material Management's 1.3. Crystal also leads on update cadence (every 3 weeks vs every 2 months). Zeus Material Management's advantage is ratings volume (73 vs 3) and iOS requirement (13.0 vs 16.0). 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.

Crystal holds the better App Store score, 5.0 against 1.3. That said, the two scores are not equally well evidenced: Zeus Material Management has 73 ratings behind it against 3, so its average is the more settled of the two.

Crystal ships an update every 3 weeks, Zeus Material Management every 2 months. The most recent releases landed on October 11, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Crystal | Zeus Material Management |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/crystal/id1438741933/reviews)** | [1.3 (73 ratings)](https://appshunter.io/ios/app/zeus-material-management/id1564799793/reviews) |
| Number of ratings | 3 | **73** |
| Positive reviews | — | 6.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Free | Free |
| Size | 76 MB | 152 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Crystal Apps Ltd.](https://appshunter.io/developer/1142260568) | [SDI Inc.](https://appshunter.io/developer/1521493905) |

## What reviewers say

### Crystal

[App page](https://appshunter.io/ios/app/crystal/id1438741933)

This AI-powered tool analyzes private business data using natural language. It provides a consumerized, human-centric platform for enterprise-level security and compliance, allowing anyone to access and analyze data by asking questions.

**Highlights:** Natural language data analysis, Conversational AI interface, Enterprise-grade security and compliance, Connects to multiple data sources, Real-time insights and forecasts, Accessible on any device

**In-app purchases:** none


### Zeus Material Management

[App page](https://appshunter.io/ios/app/zeus-material-management/id1564799793)

This app streamlines indirect supply chain management for MRO and PPE. It offers mobile tools for inventory tracking, cycle counting, and issuing, alongside eProcurement software for tail spend management. AI-driven inventory optimization helps reduce obsolete stock.

**Highlights:** Mobile inventory cycle counting, Issuing and delivery tracking, Industrial repair and warranty management, AI-enabled inventory optimization, eProcurement for tail spend, MRO expertise, Enterprise buying visibility

**In-app purchases:** none


## Frequently asked questions

### Is Crystal free?

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

### Is Zeus Material Management free?

Zeus Material Management is free to download, with no in-app purchases.

### Which has better reviews, Crystal or Zeus Material Management?

Crystal is rated higher. Crystal averages 5.0 out of 5 from 3 ratings, while Zeus Material Management averages 1.3 from 73 ratings.

### Do Crystal or Zeus Material Management have ads?

Neither Crystal nor Zeus Material Management shows ads.

### Which is updated more often, Crystal or Zeus Material Management?

Crystal ships an update every 3 weeks, and Zeus Material Management every 2 months. Most recently, Crystal was updated on October 11, 2026 and Zeus Material Management on October 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.*