# AI Spanish Learning vs Siren's Spellbook

The clearest difference is update cadence: AI Spanish Learning at every 8 days against Siren's Spellbook's every 2 weeks. AI Spanish Learning also leads on iOS requirement (15.1 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. AI Spanish Learning sells 11 in-app purchases, starting at $2.99 per 7 days and Siren's Spellbook sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

AI Spanish Learning ships an update every 8 days, Siren's Spellbook every 2 weeks. The most recent releases landed on October 24, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | AI Spanish Learning | Siren's Spellbook |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (128 ratings)](https://appshunter.io/ios/app/ai-spanish-learning-fluency/id6469807611/reviews)** | — |
| Number of ratings | **128** | — |
| Positive reviews | 56.1% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 8 days** | Every 2 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 49 MB | 26 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Fluency Technologies LLC](https://appshunter.io/developer/1712678899) | [Jordan Collin](https://appshunter.io/developer/6778770884) |

## What reviewers say

### AI Spanish Learning

[App page](https://appshunter.io/ios/app/ai-spanish-learning-fluency/id6469807611)

Master Spanish with an AI-powered platform designed for serious learners. Improve vocabulary, grammar, pronunciation, and conversational skills through scientifically proven techniques and real-life context.

**Highlights:** AI-powered learning, Spaced repetition flashcards, Practical conversation simulations, Daily grammar and pronunciation lessons, Immersive stories for comprehension, Contextual vocabulary learning

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

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Fluency Premium Pass | $2.99 | per 7 days |
| Fluency Premium Pass | $2.99 | per 7 days |
| Fluency Premium Pass | $5.99 | per 7 days |
| Fluency Premium Pass | $6.99 | per month |
| Fluency Premium Pass | $6.99 | per month |
| Fluency Premium Pass | $12.99 | per month |
| Fluency Premium Pass | $29.99 | per year |
| Fluency Premium Pass | $29.99 | per year |
| Fluency Premium Pass | $59.99 | per year |
| Lifetime Friends and Family | Free | one-time |
| Lifetime Premium Pass | $209.99 | one-time |

**What reviewers like**

- 💡 Innovative AI integration
- 👍 Great for intermediate learners
- 🗣️ Improves speaking and writing
- 📚 Contextual vocabulary
- 🚀 Efficient learning experience

**What reviewers complain about**

- 🐛 Bugs and glitches
- ❌ Network issues
- 🤖 Robot-like voice
- 🔒 Entirely behind paywall
- 🤔 Inconsistent pricing/offers

**Reported bugs**

- Network issues for months
- App won't load after charging
- AI is exact and unforgiving
- Cannot advance conversation tab
- Progress lost due to app returning to home page

**Requested features**

- Sync progress to other devices
- Advance pronunciation section level
- Option to speak with Latin American AI
- Lifetime subscription option
- Ability to revisit reading comprehension tests


### Siren's Spellbook

[App page](https://appshunter.io/ios/app/sirens-spellbook/id6778770762)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Siren’s Spellbook iPad Sheet Music | $14.99 | one-time |


## Frequently asked questions

### Is AI Spanish Learning free?

AI Spanish Learning is free to download, with in-app purchases available.

### Is Siren's Spellbook free?

Siren's Spellbook is free to download, with in-app purchases available.

### Do AI Spanish Learning or Siren's Spellbook have ads?

Neither AI Spanish Learning nor Siren's Spellbook shows ads.

### Which is updated more often, AI Spanish Learning or Siren's Spellbook?

AI Spanish Learning ships an update every 8 days, and Siren's Spellbook every 2 weeks. Most recently, AI Spanish Learning was updated on October 24, 2026 and Siren's Spellbook on October 18, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*