# DefineTestTerms vs Thullium

The clearest difference is update cadence: Thullium at every 3 weeks against DefineTestTerms's every 20 months. DefineTestTerms's advantage is iOS requirement (11.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

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

DefineTestTerms ships an update every 20 months, Thullium every 3 weeks. Both last shipped on November 3, 2026.

## The numbers

| Metric | DefineTestTerms | Thullium |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/definetestterms/id1661148814/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 20 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 31 MB | 5 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, Mac, Vision Pro** |
| Age rating | 4+ | 4+ |
| Developer | [ESP Solutions Group, Inc.](https://appshunter.io/developer/1605962614) | [Richard Simonik](https://appshunter.io/developer/1707862972) |

## What reviewers say

### DefineTestTerms

[App page](https://appshunter.io/ios/app/definetestterms/id1661148814)

Access a comprehensive glossary of assessment terms for quick definitions. This app is beneficial for understanding general and technical terms while reading reports, attending lectures, or engaging in various educational tasks.

**Highlights:** Comprehensive glossary of assessment terms, Definitions for general and technical terms, Quick access to definitions, Beneficial for educational tasks, Accessible on iPhone and iPad

**Features:** macOS Compatibility

**In-app purchases:** none


### Thullium

[App page](https://appshunter.io/ios/app/thullium/id6466820347)

**In-app purchases:** none


## Frequently asked questions

### Is DefineTestTerms free?

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

### Is Thullium free?

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

### Do DefineTestTerms or Thullium have ads?

Neither DefineTestTerms nor Thullium shows ads.

### Which is updated more often, DefineTestTerms or Thullium?

DefineTestTerms ships an update every 20 months, and Thullium every 3 weeks. Most recently, DefineTestTerms was updated on November 3, 2026 and Thullium on November 3, 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.*