# Lexicon vs Mental Math Interview Trainer

The clearest difference is ads: Lexicon at none against Mental Math Interview Trainer's shown. Lexicon also leads on iOS requirement (18.6 vs 26.4). Mental Math Interview Trainer's advantage is update cadence (every 2 days vs every 10 days). On price, 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.

Lexicon ships an update every 10 days, Mental Math Interview Trainer every 2 days. The most recent releases landed on September 27, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Lexicon | Mental Math Interview Trainer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/lexicon-visual-dictionary/id6759520591/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 10 days | **Every 2 days** |
| Monetization | Free | — |
| Size | 10 MB | 7 MB |
| Requires iOS | **18.6** | 26.4 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Ng Zhong Wei](https://appshunter.io/developer/1874790237) | [Ludovic Lepic](https://appshunter.io/developer/1892835258) |

## What reviewers say

### Lexicon

[App page](https://appshunter.io/ios/app/lexicon-visual-dictionary/id6759520591)

This app helps you build and visualize your vocabulary. It creates beautiful cards for each word, including definitions, origins, pronunciation, memory aids, and relevant photographs. Discover words in real-world contexts and organize your learning.

**Highlights:** Visual word cards, Etymology and pronunciation, Memory hooks, Real-world word sightings, Customizable collections, Daily Word of the Day

**In-app purchases:** none


### Mental Math Interview Trainer

[App page](https://appshunter.io/ios/app/mental-math-interview-trainer/id6762084410)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Lexicon free?

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

### Is Mental Math Interview Trainer free?

Mental Math Interview Trainer is free to download, with no in-app purchases.

### Do Lexicon or Mental Math Interview Trainer have ads?

Mental Math Interview Trainer shows ads; Lexicon does not.

### Which is updated more often, Lexicon or Mental Math Interview Trainer?

Lexicon ships an update every 10 days, and Mental Math Interview Trainer every 2 days. Most recently, Lexicon was updated on September 27, 2026 and Mental Math Interview Trainer 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.*