# MosaLingua vs Kalkulus

The clearest difference is in-app purchases: Kalkulus at none against MosaLingua's 11. Kalkulus also leads on update cadence (every 9 days vs every 2 months). MosaLingua's advantage is ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. MosaLingua sells 11 in-app purchases, starting at $7.49 per month. Kalkulus asks for nothing beyond the download.

MosaLingua ships an update every 2 months, Kalkulus every 9 days. The most recent releases landed on October 18, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | MosaLingua | Kalkulus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (1.8K ratings)](https://appshunter.io/ios/app/mosalingua-learn-languages/id858567694/reviews)** | — |
| Number of ratings | **1.8K** | — |
| Positive reviews | 81.8% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 9 days** |
| Monetization | Free with in-app purchases | — |
| Size | 219 MB | 107 MB |
| Requires iOS | **14.5** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [digiSchool](https://appshunter.io/developer/525382025) | [cornelius vincent](https://appshunter.io/developer/6794882158) |

## What reviewers say

### MosaLingua

[App page](https://appshunter.io/ios/app/mosalingua-learn-languages/id858567694)

This app acts as a personal language coach, offering a method designed by polyglots to help you learn vocabulary and expressions quickly. It supports numerous languages and offers specialized test preparation, adapting to your learning pace and needs.

**Highlights:** 3500+ vocabulary flashcards, Native speaker audio recordings, Spaced Repetition System (SRS), Offline capabilities, Hands-free learning mode, Customizable flashcards, TOEIC/TOEFL test prep

**Features:** Vision Pro support

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MosaLingua Premium - PM | $7.49 | per month |
| MosaLingua Premium - 1 Month | $9.49 | per month |
| MosaLingua Premium - P6M | $24.99 | per 6 months |
| MosaLingua Premium - PY | $49.99 | per year |
| MosaLingua Premium - 12 Months | $71.90 | per year |
| Mosalingua Spanish | $4.99 | one-time |
| Purchase EN Premium App | $4.99 | one-time |
| Purchase IT Premium App | $4.99 | one-time |
| Purchase DE Premium App | $4.99 | one-time |
| Purchase FR Premium App | $4.99 | one-time |
| Promo pack | $10.99 | one-time |

**What reviewers like**

- 🚀 Efficient learning method
- 👍 Customizable learning experience
- 🎓 Effective for vocabulary and phrase building
- 🔊 Good audio quality and pronunciation
- 💪 Helps with rapid language progress

**What reviewers complain about**

- 🐛 Occasional bugs and crashes
- 🕰️ Slow loading times and syncing issues
- 🤔 Confusing navigation and interface
- 🔒 Difficulty accessing premium content
- 🔇 Issues with audio playback and voice recordings

**Reported bugs**

- App resets progress and language settings
- Inability to access previously purchased content
- Inconsistent performance across devices and OS versions

**Requested features**

- More language options and dialects
- Improved user interface and customization
- Better integration with other language learning resources
- Expanded audio and visual learning content
- Enhanced spaced repetition and review features


### Kalkulus

[App page](https://appshunter.io/ios/app/kalkulus/id6794882155)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is MosaLingua free?

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

### Is Kalkulus free?

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

### Do MosaLingua or Kalkulus have ads?

Kalkulus shows ads; MosaLingua does not.

### Which is updated more often, MosaLingua or Kalkulus?

MosaLingua ships an update every 2 months, and Kalkulus every 9 days. Most recently, MosaLingua was updated on October 18, 2026 and Kalkulus on October 7, 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.*