# Stella vs Dialog Engine

The clearest difference is monetization model: Dialog Engine at free with in-app purchases against Stella's subscription. Dialog Engine also leads on rating (5.0 vs 4.5). Stella's advantage is ads (none vs shown) and ratings volume (3.6K vs 2). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Stella sells 19 in-app purchases, starting at $0.99 per 7 days and Dialog Engine sells 4 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Dialog Engine holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Stella has 3.6K ratings behind it against 2, so its average is the more settled of the two.

Stella ships an update every 8 days, Dialog Engine fortnightly. The most recent releases landed on October 26, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Stella | Dialog Engine |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (3.6K ratings)](https://appshunter.io/ios/app/stella-learn-spanish-ai/id6739937896/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/dialog-engine-learn-languages/id6762476954/reviews)** |
| Number of ratings | **3.6K** | 2 |
| Positive reviews | 17.6% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 8 days** | Fortnightly |
| Monetization | Subscription | **Free with in-app purchases** |
| Best chart rank | **#191** | — |
| Size | 211 MB | 61 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [HONG KONG BETENSH LIMITED](https://appshunter.io/developer/1735878154) | [Ample Labs LLC](https://appshunter.io/developer/1760814136) |

## What reviewers say

### Stella

[App page](https://appshunter.io/ios/app/stella-learn-spanish-ai/id6739937896)

**Currently charting:** #191 Top Grossing · Education (US App Store)

This app uses advanced AI to make learning Spanish easy, fast, and interactive. It offers comprehensive courses, AI-powered conversations, pronunciation practice with speech recognition, and engaging lessons to improve listening, reading, and comprehension skills.

**Highlights:** AI-powered Spanish courses, One-on-one AI tutor conversations, Speech recognition for pronunciation practice, Quizzes for comprehension checks, Engaging lessons for listening and reading, Simplified grammar and vocabulary tests

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

**In-app purchases (19)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stella AI PRO: Weekly | $0.99 | per 7 days |
| Stella AI PRO: Weekly | $5.99 | per 7 days |
| Stella AI PRO: Weekly | $7.99 | per 7 days |
| Stella AI PRO: Weekly Plan | $7.99 | per 7 days |
| Stella AI : Super Offer | $17.99 | per year |
| Stella AI PRO: Month | $19.99 | per month |
| Stella AI PRO: Half Year | $29.99 | per 6 months |
| Free Trial Plan | $29.99 | per year |
| Stella AI PRO: Annual | $29.99 | per year |
| Stella AI PRO: Annual | $34.99 | per year |
| Stella AI PRO: Annual | $34.99 | per year |
| Stella AI PRO: Annual | $39.99 | per year |
| Stella AI PRO: 6 month | $39.99 | per 6 months |
| Stella AI PRO: Annual | $45.99 | per year |
| Stella AI PRO: Annual | $49.99 | per year |
| Stella AI PRO: Annual | $49.99 | per year |
| Stella AI PRO: Annual | $59.99 | per year |
| Annual VIP - 3 days Free | $59.99 | per year |
| Stella Lifetime Premium | $99.99 | one-time |

**What reviewers like**

- 🤩 Fun and enjoyable app
- 👍 Good for beginners

**What reviewers complain about**

- 🤖 Inaccurate speech recognition
- 🤔 Limited content and lessons
- 🙄 Misleading advertising
- 💰 Overpriced for the features
- 🐛 Frequent app crashes and freezes

**Reported bugs**

- App freezing and crashing during lessons
- Incorrect answers marked as correct
- Inability to progress through lessons

**Requested features**

- More advanced lessons and content
- Improved speech recognition and feedback
- Addition of songs and music-based learning
- Better customer support and responsiveness


### Dialog Engine

[App page](https://appshunter.io/ios/app/dialog-engine-learn-languages/id6762476954)

Practice real-life conversations in Spanish, French, and Italian with AI-powered feedback. Track your fluency with a science-backed rating system that adapts to your level. Focus on practical language skills without artificial pressure.

**Highlights:** Roleplay real-life scenes, Instant feedback on responses, Science-backed fluency rating, Adaptive learning levels, Spanish, French, Italian support, No streaks or guilt trips

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Monthly | $4.99 | per month |
| Unlimited Monthly Trial | $4.99 | per month |
| Unlimited Annual | $29.99 | per year |
| Unlimited Yearly Trial | $29.99 | per year |


## Frequently asked questions

### Is Stella free?

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

### Is Dialog Engine free?

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

### Which has better reviews, Stella or Dialog Engine?

Dialog Engine is rated higher. Stella averages 4.5 out of 5 from 3.6K ratings, while Dialog Engine averages 5.0 from 2 ratings.

### Do Stella or Dialog Engine have ads?

Dialog Engine shows ads; Stella does not.

### Which is updated more often, Stella or Dialog Engine?

Stella ships an update every 8 days, and Dialog Engine fortnightly. Most recently, Stella was updated on October 26, 2026 and Dialog Engine on October 20, 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.*