# Duolingo vs SLSL Dictionary

The clearest difference is review sentiment: SLSL Dictionary at 100% against Duolingo's 65%. SLSL Dictionary also leads on in-app purchases (none vs 28) and ads (none vs shown). Duolingo's advantage is ratings volume (5.5M vs 2) and chart position (#1 vs unranked). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Duolingo sells 16 in-app purchases, starting at $9.99 per month. SLSL Dictionary asks for nothing beyond the download.

SLSL Dictionary holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Duolingo has 5.5M ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 65% of Duolingo's written reviews are positive against 100% of SLSL Dictionary's.

Duolingo ships an update weekly, SLSL Dictionary every 2 weeks. The most recent releases landed on September 26, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | Duolingo | SLSL Dictionary |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (5.5M ratings)](https://appshunter.io/ios/app/duolingo-language-lessons/id570060128/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/slsl-dictionary/id6445848879/reviews)** |
| Number of ratings | **5.5M** | 2 |
| Positive reviews | 64.6% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Every 2 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Best chart rank | **#1** | — |
| Size | 489 MB | 52 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Duolingo, Inc](https://appshunter.io/developer/570060151) | [Daniel Porteous](https://appshunter.io/developer/1531368370) |

## What reviewers say

### Duolingo

[App page](https://appshunter.io/ios/app/duolingo-language-lessons/id570060128)

**Currently charting:** #1 Top Free · Education, #1 Top Grossing · Education, #26 Top Grossing, #69 Top Free (US App Store)

Learn languages, math, music, and chess through fun, bite-sized lessons. Build vocabulary, grammar, and real-world skills with a science-based methodology. Track progress and stay motivated with a global community.

**Highlights:** Bite-sized language lessons, Speaking, reading, listening, writing practice, Math skills development, Music reading and playing, Chess strategy and gameplay, Progress tracking and rewards

**Features:** Vision Pro support

**In-app purchases (16)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Super Duolingo | $9.99 | per month |
| Super Duolingo | $12.99 | per month |
| Super Duolingo | $12.99 | per month |
| Super Duolingo | $59.99 | per year |
| Super Duolingo | $79.99 | per year |
| Super Duolingo | $83.99 | per year |
| Super Duolingo | $83.99 | per year |
| Super Duolingo | $95.99 | per year |
| Super Duolingo | $119.99 | per year |
| Super Duolingo | $119.99 | per year |
| Chest of Gems | $0.99 | one-time |
| Barrel of Gems (1200) | $4.99 | one-time |
| Chest of Gems (1200) | $4.99 | one-time |
| Cart of Gems (3000) | $9.99 | one-time |
| Barrel of Gems (3000) | $9.99 | one-time |
| Cart of Gems (6500) | $19.99 | one-time |

**What reviewers like**

- 🤩 Fun and entertaining learning experience
- 🎉 Motivating streak and league features
- 🎨 Cute and engaging animations
- 📚 Effective for learning vocabulary and basics
- 🤖 Useful AI-powered features like voice lessons

**What reviewers complain about**

- 🤖 Issues with voice recognition and pronunciation feedback
- 🤑 Aggressive monetization tactics and paywall for key features
- 🤯 Frustrating heart/health system that penalizes mistakes
- 🤔 Lack of grammar explanations and focus on just memorizing phrases
- 🤷‍♀️ Inconsistent app experience across platforms

**Reported bugs**

- Freezing or crashing during lessons
- Incorrect translations or answers marked wrong
- Inconsistent behavior of certain features like leagues

**Requested features**

- Add more languages, especially less common ones
- Improve grammar lessons and explanations
- Allow more flexibility in navigating the course content
- Provide better feedback and corrections for mistakes
- Sync progress and features consistently across app and web


### SLSL Dictionary

[App page](https://appshunter.io/ios/app/slsl-dictionary/id6445848879)

Learn sign language with definitions and videos for each sign. Save custom word lists and use flashcards with spaced repetition for effective revision. Supports English, Sinhala, and Tamil.

**Highlights:** Video demonstrations for signs, Custom word list saving, Flashcard revision feature, Spaced repetition learning, Support for English, Sinhala, and Tamil

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

**In-app purchases:** none


## Frequently asked questions

### Is Duolingo free?

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

### Is SLSL Dictionary free?

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

### Which has better reviews, Duolingo or SLSL Dictionary?

SLSL Dictionary is rated higher. Duolingo averages 4.7 out of 5 from 5.5M ratings, while SLSL Dictionary averages 5.0 from 2 ratings.

### Do Duolingo or SLSL Dictionary have ads?

Duolingo shows ads; SLSL Dictionary does not.

### Which is updated more often, Duolingo or SLSL Dictionary?

Duolingo ships an update weekly, and SLSL Dictionary every 2 weeks. Most recently, Duolingo was updated on September 26, 2026 and SLSL Dictionary on September 11, 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.*