# Solutions 21 vs Lingua Logger

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

Both are free to download. Lingua Logger sells 2 in-app purchases, starting at $1.99 per month. Solutions 21 asks for nothing beyond the download.

Solutions 21 ships an update every 15 months, Lingua Logger every 2 weeks. The most recent releases landed on October 10, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Solutions 21 | Lingua Logger |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (6 ratings)](https://appshunter.io/ios/app/lingua-logger-study-tracker/id6745210241/reviews)** |
| Number of ratings | — | **6** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | — | Yes |
| Update frequency | Every 15 months | **Every 2 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 74 MB | 57 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | — | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Solutions 21 Inc](https://appshunter.io/developer/1725340759) | [SWOL LLC (USA)](https://appshunter.io/developer/1601731157) |

## What reviewers say

### Solutions 21

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

**In-app purchases:** none


### Lingua Logger

[App page](https://appshunter.io/ios/app/lingua-logger-study-tracker/id6745210241)

This app helps you track your language learning progress with detailed logging and visualization tools. Set goals, maintain streaks, and gain insights into your study habits across over 60 languages. Sync your data across devices and export your logs for further analysis.

**Highlights:** Log study time for any language activity, Visualize progress with charts and graphs, Set daily, weekly, or monthly study goals, Maintain daily study streaks, Support for over 60 languages, Export study logs as CSV, Cross-device synchronization

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lingua Logger Premium Monthly | $1.99 | per month |
| Lingua Logger Premium Yearly | $14.99 | per year |


## Frequently asked questions

### Is Solutions 21 free?

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

### Is Lingua Logger free?

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

### Which is updated more often, Solutions 21 or Lingua Logger?

Solutions 21 ships an update every 15 months, and Lingua Logger every 2 weeks. Most recently, Solutions 21 was updated on October 10, 2026 and Lingua Logger on October 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.*