# Solutions 21 vs Lingotune

The clearest difference is in-app purchases: Solutions 21 at none against Lingotune's 3. Lingotune's advantage is update cadence (every 2 weeks vs every 15 months). On price and iOS requirement there is nothing between them.

Both are free to download. Lingotune sells 3 in-app purchases, starting at $4.99 per 7 days. Solutions 21 asks for nothing beyond the download.

Solutions 21 ships an update every 15 months, Lingotune every 2 weeks. The most recent releases landed on October 27, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Solutions 21 | Lingotune |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.9 (60 ratings)](https://appshunter.io/ios/app/lingotune-learn-spanish/id6742558635/reviews)** |
| Number of ratings | — | **60** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Update frequency | Every 15 months | **Every 2 weeks** |
| Monetization | — | Free |
| Size | 74 MB | 114 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | — | **iPhone** |
| Age rating | 4+ | 9+ |
| Developer | [Solutions 21 Inc](https://appshunter.io/developer/1725340759) | [Sentience AI, Inc.](https://appshunter.io/developer/1798959715) |

## What reviewers say

### Solutions 21

[App page](https://appshunter.io/ios/app/solutions-21/id6475880899)

**In-app purchases:** none


### Lingotune

[App page](https://appshunter.io/ios/app/lingotune-learn-spanish/id6742558635)

Learn Spanish through original songs crafted by linguists and musicians. This app focuses on natural language acquisition through music, incorporating real slang and conversational grammar. Enjoy hands-free learning and adaptive reviews to build fluency.

**Highlights:** Original songs designed for memory retention, Hands-free listening mode, Learn real slang and culture, Conversation-focused grammar, Adaptive review system (Amplifier Mode)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $4.99 | per 7 days |
| Founding Member (Annual) | $39.99 | per year |
| Yearly Subscription | $79.99 | per year |


## Frequently asked questions

### Is Solutions 21 free?

Solutions 21 is free to download, with no in-app purchases.

### Is Lingotune free?

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

### Which is updated more often, Solutions 21 or Lingotune?

Solutions 21 ships an update every 15 months, and Lingotune every 2 weeks. Most recently, Solutions 21 was updated on October 27, 2026 and Lingotune on October 28, 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.*