# Rocket Languages vs iSigner

The clearest difference is review sentiment: Rocket Languages at 69% against iSigner's 0%. Rocket Languages also leads on rating (4.6 vs 1.0) and update cadence (every 3 weeks vs every 5 months). iSigner's advantage is iOS requirement (10.0 vs 16.4). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Rocket Languages sells 49 one-off in-app purchases and iSigner sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Rocket Languages holds the better App Store score, 4.6 against 1.0. That said, the two scores are not equally well evidenced: Rocket Languages has 2.4K ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 69% of Rocket Languages's written reviews are positive against 0% of iSigner's.

Rocket Languages ships an update every 3 weeks, iSigner every 5 months. The most recent releases landed on September 24, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Rocket Languages | iSigner |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (2.4K ratings)](https://appshunter.io/ios/app/rocket-languages/id597293943/reviews)** | [1.0 (2 ratings)](https://appshunter.io/ios/app/isigner/id1438330350/reviews) |
| Number of ratings | **2.4K** | 2 |
| Positive reviews | **69.2% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 5 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 44 MB | 27 MB |
| Requires iOS | 16.4 | **10.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Libros Media Ltd](https://appshunter.io/developer/597291855) | [焕 盛](https://appshunter.io/developer/1438330349) |

## What reviewers say

### Rocket Languages

[App page](https://appshunter.io/ios/app/rocket-languages/id597293943)

Learn to speak new languages like Spanish, French, and Japanese with structured audio lessons and cultural insights. This app offers lifetime access to courses designed for real conversations, helping you overcome common learning frustrations and speak confidently from day one.

**Highlights:** Structured audio lessons for speaking, Lifetime access with free updates, Cultural insights and customs, Voice recognition for pronunciation, Adaptive review activities, Interactive audio and conversation practice

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

**In-app purchases (49)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Rocket Sign Language Level 1 | $39.99 | one-time |
| Rocket Spanish Level 1 | $59.99 | one-time |
| Rocket Japanese Level 1 | $59.99 | one-time |
| Rocket Italian Level 1 | $59.99 | one-time |
| Rocket Korean Level 1 | $59.99 | one-time |
| Rocket Arabic Level 1 | $59.99 | one-time |
| Rocket French Level 1 | $59.99 | one-time |
| Rocket Portuguese Level 1 | $59.99 | one-time |
| Rocket Sign Language Level 1 | $59.99 | one-time |
| Rocket Spanish Level 1 | $89.99 | one-time |
| Rocket Korean Level 1 | $89.99 | one-time |
| Rocket Arabic Level 1 | $89.99 | one-time |
| Rocket French Level 1 | $89.99 | one-time |
| Rocket German Level 1 | $89.99 | one-time |
| Rocket Italian Level 1 | $89.99 | one-time |
| Rocket Japanese Level 1 | $89.99 | one-time |
| Rocket French Level 1 | $99.99 | one-time |
| Rocket Japanese Level 1 | $99.99 | one-time |
| Rocket Italian Level 1 | $99.99 | one-time |
| Rocket Spanish Level 1 | $99.99 | one-time |
| Rocket Spanish Levels 1 & 2 | $119.99 | one-time |
| Rocket Spanish Premium: Level 1 | $149.99 | one-time |
| Rocket French Premium: Level 1 | $149.99 | one-time |
| Rocket German Premium: Level 1 | $149.99 | one-time |
| Rocket Italian Premium: Level 1 | $149.99 | one-time |
| Rocket Japanese Premium: Level 1 | $149.99 | one-time |
| Rocket Chinese Premium: Level 1 | $149.99 | one-time |
| Rocket Arabic Premium: Level 1 | $149.99 | one-time |
| Rocket Portuguese Premium: Level 1 | $149.99 | one-time |
| Rocket Korean Premium: Level 1 | $149.99 | one-time |
| Rocket Russian Premium: Level 1 | $149.99 | one-time |
| Rocket Spanish Levels 1, 2 & 3 | $179.99 | one-time |
| Rocket French Levels 1, 2 & 3 | $179.99 | one-time |
| Rocket Japanese Level 1, 2 & 3 | $179.99 | one-time |
| Rocket Russian Levels 1, 2 & 3 | $179.99 | one-time |
| Rocket German Levels 1, 2 & 3 | $179.99 | one-time |
| Rocket Chinese Levels 1, 2 & 3 | $179.99 | one-time |
| Rocket Italian Levels 1, 2 & 3 | $179.99 | one-time |
| Rocket Spanish Levels 1, 2 & 3 | $249.99 | one-time |
| Rocket Japanese Level 1, 2 & 3 | $249.99 | one-time |
| Rocket Italian Levels 1, 2 & 3 | $249.99 | one-time |
| Rocket German Levels 1, 2 & 3 | $249.99 | one-time |
| Rocket Chinese Levels 1, 2 & 3 | $249.99 | one-time |
| Rocket Russian Levels 1, 2 & 3 | $249.99 | one-time |
| Rocket French Levels 1, 2 & 3 | $249.99 | one-time |
| Rocket Japanese Level 1, 2 & 3 | $259.99 | one-time |
| Rocket Italian Levels 1, 2 & 3 | $259.99 | one-time |
| Rocket Spanish Levels 1, 2 & 3 | $259.99 | one-time |
| Rocket French Levels 1, 2 & 3 | $259.99 | one-time |

**What reviewers like**

- 👍 Interactive and engaging lessons
- 🚀 Comprehensive and structured learning approach
- 💡 Variety of practice methods (listening, speaking, writing)
- 👍 Explanations of grammar and cultural context
- 🚀 Detailed and accurate pronunciation feedback

**What reviewers complain about**

- 🐛 Voice recognition issues and inconsistencies
- 🐛 App crashes and bugs
- 🐛 Inability to review/replay recorded audio
- 🐛 Lack of offline functionality
- 🐛 Outdated or confusing user interface

**Reported bugs**

- Audio playback issues
- Inconsistent voice recognition
- Lesson progress not properly tracked
- Compatibility problems with newer devices/OS
- Crashes and freezes during use

**Requested features**

- Ability to slow down audio playback
- More grammar and vocabulary review tools
- Improved search and navigation within the app
- Customizable learning plans and progress tracking
- Integration with other language learning resources


### iSigner

[App page](https://appshunter.io/ios/app/isigner/id1438330350)

This app provides the world's first and only comprehensive Shanghai sign language dictionary. It features a vocabulary of 4000 signs derived from extensive video content, influencing sign languages across China and other Asian regions.

**Highlights:** Shanghai sign language dictionary, 4000 video signs, Influential sign language variant, Comprehensive vocabulary

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 上海手语常用词库 | $12.99 | one-time |


## Frequently asked questions

### Is Rocket Languages free?

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

### Is iSigner free?

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

### Which has better reviews, Rocket Languages or iSigner?

Rocket Languages is rated higher. Rocket Languages averages 4.6 out of 5 from 2.4K ratings, while iSigner averages 1.0 from 2 ratings.

### Do Rocket Languages or iSigner have ads?

Neither Rocket Languages nor iSigner shows ads.

### Which is updated more often, Rocket Languages or iSigner?

Rocket Languages ships an update every 3 weeks, and iSigner every 5 months. Most recently, Rocket Languages was updated on September 24, 2026 and iSigner on June 1, 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.*