# 504 vs Cephas BJJ

The clearest difference is in-app purchases: Cephas BJJ at none against 504's 13. Cephas BJJ also leads on ads (none vs shown) and review sentiment (100% vs 73%). 504's advantage is ratings volume (4.6K vs 2) and update cadence (fortnightly vs every 2 months). 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. Cephas BJJ asks for nothing beyond the download.

Cephas BJJ holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: 504 has 4.6K ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 73% of 504's written reviews are positive against 100% of Cephas BJJ's.

504 ships an update fortnightly, Cephas BJJ every 2 months. The most recent releases landed on October 25, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | 504 | Cephas BJJ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (4.6K ratings)](https://appshunter.io/ios/app/504-vocabulary-builder/id1452101398/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/cephas-bjj/id6560104961/reviews)** |
| Number of ratings | **4.6K** | 2 |
| Positive reviews | 73.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 66 MB | 64 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Nefarius Apps](https://appshunter.io/developer/1792473508) | [Tapp, LLC](https://appshunter.io/developer/1466940621) |

## What reviewers say

### 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


### Cephas BJJ

[App page](https://appshunter.io/ios/app/cephas-bjj/id6560104961)

Stay updated with your martial arts academy's news, announcements, and schedule changes. Access technique videos, check into classes, and track your progress with awards.

**Highlights:** News and announcements, Schedule updates, Technique videos, Class check-in, Progress tracking, Award system

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

**In-app purchases:** none


## Frequently asked questions

### Is 504 free?

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

### Is Cephas BJJ free?

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

### Which has better reviews, 504 or Cephas BJJ?

Cephas BJJ is rated higher. 504 averages 4.8 out of 5 from 4.6K ratings, while Cephas BJJ averages 5.0 from 2 ratings.

### Do 504 or Cephas BJJ have ads?

504 shows ads; Cephas BJJ does not.

### Which is updated more often, 504 or Cephas BJJ?

504 ships an update fortnightly, and Cephas BJJ every 2 months. Most recently, 504 was updated on October 25, 2026 and Cephas BJJ on October 27, 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.*