# Lectary vs GuK

The clearest difference is in-app purchases: Lectary at none against GuK's 4. GuK's advantage is update cadence (every 5 days vs every 18 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. GuK sells 4 one-off in-app purchases. Lectary asks for nothing beyond the download.

Lectary ships an update every 18 months, GuK every 5 days. The most recent releases landed on September 17, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Lectary | GuK |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 18 months | **Every 5 days** |
| Monetization | — | Free with in-app purchases |
| Size | 38 MB | 186 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Technische Universität Wien](https://appshunter.io/developer/1205391533) | [Deutsches Down-Syndrom InfoCenter](https://appshunter.io/developer/1792864018) |

## What reviewers say

### Lectary

[App page](https://appshunter.io/ios/app/lectary/id1317805236)

**Features:** macOS Compatibility

**In-app purchases:** none


### GuK

[App page](https://appshunter.io/ios/app/guk/id6741070160)

This app supports children learning spoken language through sign language. It offers over 200 video-based signs, organized by topic or alphabetically, with interactive learning modes and songs. Designed for parents, educators, and therapists to aid communication development.

**Highlights:** Over 200 video-based signs, Searchable sign library, Customizable sign lists, Quiz and practice modes, Songs with accompanying signs, Intuitive interface

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| GuK Plus | $8.99 | one-time |
| GuK 1 | $24.99 | one-time |
| GuK 2 | $24.99 | one-time |
| GuK Gesamtpaket | $49.99 | one-time |


## Frequently asked questions

### Is Lectary free?

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

### Is GuK free?

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

### Do Lectary or GuK have ads?

Neither Lectary nor GuK shows ads.

### Which is updated more often, Lectary or GuK?

Lectary ships an update every 18 months, and GuK every 5 days. Most recently, Lectary was updated on September 17, 2026 and GuK on September 22, 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.*