# SynZero vs Lek

The clearest difference is in-app purchases: SynZero at none against Lek's 10. Lek's advantage is update cadence (every 3 weeks vs every 6 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Lek sells 10 in-app purchases, starting at $8.99 per month. SynZero asks for nothing beyond the download.

SynZero ships an update every 6 months, Lek every 3 weeks. The most recent releases landed on November 7, 2026 and November 12, 2026 respectively.

## The numbers

| Metric | SynZero | Lek |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (83 ratings)](https://appshunter.io/ios/app/lek-ai-chatbot-and-assistant/id1643403406/reviews)** |
| Number of ratings | — | **83** |
| Positive reviews | — | 76.9% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 19 MB | 152 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 12+ |
| Developer | [Syngene](https://appshunter.io/developer/1547636424) | [AppTech Private Limited](https://appshunter.io/developer/1501543234) |

## What reviewers say

### SynZero

[App page](https://appshunter.io/ios/app/synzero/id1598552741)

**Features:** macOS Compatibility

**In-app purchases:** none


### Lek

[App page](https://appshunter.io/ios/app/lek-ai-chatbot-and-assistant/id1643403406)

This AI-powered writing assistant generates various types of content, from emails and essays to ad copy and lyrics. It simplifies writing tasks with an easy-to-use interface, offering a wide range of content generation options in multiple languages.

**Highlights:** AI content generation, Email and essay writing, Ad copy and SEO meta text creation, Grammar correction and rephrasing, Content summarization and expansion, Idea generation for copywriting, Lyrics and tagline creation

**Features:** Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AI Writing - Starter Monthly | $8.99 | per month |
| Pro - Monthly | $14.99 | per month |
| AI Writing - Pro Monthly | $17.99 | per month |
| Max Monthly | $24.99 | per month |
| AI Writing Max - Monthly | $29.99 | per month |
| AI Writing - Starter Yearly | $79.99 | per year |
| Pro Yearly | $119.99 | per year |
| AI Writing Pro - Yearly | $159.99 | per year |
| Max Yearly | $224.99 | per year |
| AI Writing Max - Yearly | $299.99 | per year |


## Frequently asked questions

### Is SynZero free?

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

### Is Lek free?

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

### Do SynZero or Lek have ads?

Neither SynZero nor Lek shows ads.

### Which is updated more often, SynZero or Lek?

SynZero ships an update every 6 months, and Lek every 3 weeks. Most recently, SynZero was updated on November 7, 2026 and Lek on November 12, 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.*