# Lekh vs System Designer

The clearest difference is in-app purchases: System Designer at none against Lekh's 2. System Designer also leads on rating (4.4 vs 4.2). Lekh's advantage is update cadence (fortnightly vs monthly) and iOS requirement (13.4 vs 15.6). On price, review sentiment, ratings volume and ads there is nothing between them.

Both are free to download. Lekh sells 2 in-app purchases, starting at $3.99 per month. System Designer asks for nothing beyond the download.

System Designer holds the better App Store score, 4.4 against 4.2. Both are backed by a comparable volume of ratings — 15 and 17 respectively. Written reviews point the same way: 72% of Lekh's written reviews are positive against 78% of System Designer's.

Lekh ships an update fortnightly, System Designer monthly. The most recent releases landed on October 24, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | Lekh | System Designer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (15 ratings)](https://appshunter.io/ios/app/lekh-diagram-and-flowchart-app/id576124115/reviews) | **[4.4 (17 ratings)](https://appshunter.io/ios/app/system-designer/id1132983280/reviews)** |
| Number of ratings | 15 | **17** |
| Positive reviews | 71.9% of reviews | **77.8% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Monthly |
| Monetization | Free with in-app purchases | **Free** |
| Size | 15 MB | 7 MB |
| Requires iOS | **13.4** | 15.6 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [LEKHAPP LLC](https://appshunter.io/developer/1536055784) | [Erwan Carriou](https://appshunter.io/developer/1102494853) |

## What reviewers say

### Lekh

[App page](https://appshunter.io/ios/app/lekh-diagram-and-flowchart-app/id576124115)

This app provides an infinite canvas for freehand drawing and creating various diagrams. It intelligently converts sketches into precise shapes and connections, supporting a wide range of diagram types for business, design, and planning.

**Highlights:** Infinite canvas for drawing, Smart diagram and flowchart creation, Layout and inspection report drawing, Swimlane and business process mapping, Rapid UI wireframing, Support for numerous diagram types, Online and offline modes

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lekh Premium for one month | $3.99 | per month |
| Lekh Premium for one year | $34.99 | per year |


### System Designer

[App page](https://appshunter.io/ios/app/system-designer/id1132983280)

Design complex systems using a low-code platform that leverages UML standards. Generate code skeletons and manage components graphically. Run and test your system with dynamic type checking.

**Highlights:** UML-based system modeling, Code skeleton generation, Graphical component creation, MSON format for model definition, Dynamic type checking, Cross-device synchronization via GitHub

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Lekh free?

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

### Is System Designer free?

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

### Which has better reviews, Lekh or System Designer?

System Designer is rated higher. Lekh averages 4.2 out of 5 from 15 ratings, while System Designer averages 4.4 from 17 ratings.

### Do Lekh or System Designer have ads?

Neither Lekh nor System Designer shows ads.

### Which is updated more often, Lekh or System Designer?

Lekh ships an update fortnightly, and System Designer monthly. Most recently, Lekh was updated on October 24, 2026 and System Designer on October 23, 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.*