# 504 vs GO2TRain

The clearest difference is ads: GO2TRain at none against 504's shown. GO2TRain also leads on iOS requirement (15.0 vs 18.0). 504's advantage is update cadence (fortnightly vs monthly) and ratings volume (4.6K vs 1.3K). On price, rating, review sentiment and in-app purchases there is nothing between them.

Both are free to download. 504 sells 6 in-app purchases, starting at $4.99 per 7 days and GO2TRain sells 7 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.8 for 504 against 4.9 for GO2TRain. Both are backed by a comparable volume of ratings — 4.6K and 1.3K respectively. Written reviews are what separate them: 73% of 504's written reviews are positive against 74% of GO2TRain's.

504 ships an update fortnightly, GO2TRain monthly. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | 504 | GO2TRain |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (4.6K ratings)](https://appshunter.io/ios/app/504-vocabulary-builder/id1452101398/reviews) | **[4.9 (1.3K ratings)](https://appshunter.io/ios/app/go2train/id1638102808/reviews)** |
| Number of ratings | **4.6K** | 1.3K |
| Positive reviews | 73.0% of reviews | **74.2% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Monthly |
| Monetization | Free with in-app purchases | Freemium |
| Size | 66 MB | 138 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) | [GO2TR EGITIM TURIZM GAYRIMENKUL DANISMANLIK REKLAMCILIK PAZARLAMA VE TICARET ANONIM S](https://appshunter.io/developer/1446426887) |

## 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 (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $4.99 | per 7 days |
| Premium | $9.99 | per month |
| Premium | $9.99 | per month |
| Premium | $9.99 | per 7 days |
| Premium | $34.99 | per year |
| Yearly Pro Membership | $59.99 | per year |

**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


### GO2TRain

[App page](https://appshunter.io/ios/app/go2train/id1638102808)

Master new languages with engaging video lessons, AI chat practice, and downloadable handouts. Connect with language partners to improve speaking skills. Available on mobile and desktop.

**Highlights:** Diverse language selection, Engaging video lessons, Language partner connection, AI chat for practice, Downloadable handouts, Quizzes and exercises, Desktop version available

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| GO2TRain | $1.99 | per 7 days |
| GO2TRain | $4.99 | per month |
| GO2TRain | $5.99 | per month |
| GO2TRain | $19.99 | per 6 months |
| GO2TRain | $29.99 | per year |
| GO2TRain | $49.99 | per month |
| GO2TRain | $149.00 | one-time |

**What reviewers like**

- 🤩 Awesome learning app
- 👍 Great and free app to learn new languages
- 👌 Useful for learning new languages
- 🔥 Totally free with amazing courses

**What reviewers complain about**

- 🐛 App crashes and closes immediately after opening
- 🐛 App not working properly on latest iOS version
- 🐛 Different sections of the app not opening
- 🐛 App keeps crashing and logging out of lessons

**Reported bugs**

- Videos not opening in iOS
- App crashing after updates

**Requested features**

- Add Japanese language courses
- Provide a desktop version of the app


## Frequently asked questions

### Is 504 free?

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

### Is GO2TRain free?

GO2TRain is free to download, with in-app purchases available.

### Which has better reviews, 504 or GO2TRain?

GO2TRain is rated higher. 504 averages 4.8 out of 5 from 4.6K ratings, while GO2TRain averages 4.9 from 1.3K ratings.

### Do 504 or GO2TRain have ads?

504 shows ads; GO2TRain does not.

### Which is updated more often, 504 or GO2TRain?

504 ships an update fortnightly, and GO2TRain monthly. Most recently, 504 was updated on November 2, 2026 and GO2TRain 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.*