# Math Dictionary vs 504

The clearest difference is review sentiment: 504 at 73% against Math Dictionary's 0%. 504 also leads on rating (4.8 vs 1.6) and ratings volume (4.6K vs 7). Math Dictionary's advantage is in-app purchases (none vs 13) and ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. 504 sells 12 in-app purchases, starting at $4.99 per 7 days. Math Dictionary asks for nothing beyond the download.

504 holds the better App Store score, 4.8 against 1.6. That said, the two scores are not equally well evidenced: 504 has 4.6K ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 0% of Math Dictionary's written reviews are positive against 73% of 504's.

## The numbers

| Metric | Math Dictionary | 504 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.6 (7 ratings)](https://appshunter.io/ios/app/math-dictionary/id1253828909/reviews) | **[4.8 (4.6K ratings)](https://appshunter.io/ios/app/504-vocabulary-builder/id1452101398/reviews)** |
| Number of ratings | 7 | **4.6K** |
| Positive reviews | 0.0% of reviews | **72.6% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | — | Fortnightly |
| Monetization | **Free** | Free with in-app purchases |
| Size | 57 MB | 65 MB |
| Requires iOS | **8.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Santosh Mishra](https://appshunter.io/developer/1187693169) | [Nefarius Apps](https://appshunter.io/developer/1792473508) |

## What reviewers say

### Math Dictionary

[App page](https://appshunter.io/ios/app/math-dictionary/id1253828909)

Instantly decode any math term with this free app. It offers a vast encyclopedia of mathematical concepts, a search function, and the ability to bookmark terms for easy access.  It also includes an audio feature for correct pronunciation.

**Highlights:** Huge math term encyclopedia, Search functionality, Bookmark terms, Share terms on social media, Audio pronunciation

**In-app purchases:** none


### 504

[App page](https://appshunter.io/ios/app/504-vocabulary-builder/id1452101398)

Master essential vocabulary with this language learning app. It offers clear definitions, example sentences, and native pronunciation for high-utility words. Engage with interactive games like flashcards and quizzes to reinforce learning and track your progress effectively.

**Highlights:** Essential vocabulary selection, Clear definitions and example sentences, Native pronunciation audio, Interactive learning games (flashcards, quizzes), Progress tracking tools, Multi-language support

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $4.99 | per 7 days |
| Weekly Pro Membership | $8.99 | per 7 days |
| Weekly Premium Membership | $9.99 | per 7 days |
| Premium | $9.99 | per month |
| Premium | $9.99 | per month |
| Premium | $9.99 | per 7 days |
| Monthly Pro Membership | $17.99 | per month |
| Monthly Premium Membership | $19.99 | per month |
| Premium | $34.99 | per year |
| Yearly Premium Membership | $59.99 | per year |
| Yearly Pro Membership | $59.99 | per year |
| Lifetime Access | $79.99 | one-time |

**What reviewers like**

- 🚀 Easy to learn
- 👍 Useful vocabulary practice
- 🚀 Convenient for learning on the go

**What reviewers complain about**

- 🐛 Bugs and glitches in latest version
- 🔒 Concerns about data tracking
- 🔊 Issues with pronunciation and audio

**Reported bugs**

- Pronunciation not working in latest version
- Lessons for second half of book blocked behind paywall
- Compatibility issues with older devices

**Requested features**

- Add part of speech for each word
- Include a note box for personal examples
- Add dark mode option


## Frequently asked questions

### Is Math Dictionary free?

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

### Is 504 free?

504 is free to download, with in-app purchases available.

### Which has better reviews, Math Dictionary or 504?

504 is rated higher. Math Dictionary averages 1.6 out of 5 from 7 ratings, while 504 averages 4.8 from 4.6K ratings.

### Do Math Dictionary or 504 have ads?

504 shows ads; Math Dictionary does not.

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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.*