Lekh: Diagram & Flowchart App

Lekh: Diagram & Flowchart App

Whiteboard, Mind Map & Sketch

15 ratings
57 reviews
Free
In-App Purchases

Details

Released
November 27, 2012
Updated
October 13, 2026

Features

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About

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.

✓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
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+1

What's New in Lekh

3.5.9

October 13, 2026

Bug fixes

2

Subscriptions & In-App Purchases

Lekh Premium for one year

Store boards in cloud and collaborate

$34.991 Year
How to cancel Lekh subscription ⁉️

User reviews

Amazing Tool

Fantastic for designers. Can make professional sketches with the smart snap tool, and make fine adjustments to anything you’ve drawn. If is doesn’t already have a shape in the library, you can draw and save your own versions, fantastic for niche applications. The export engine is powerful, allowing you export however you need. I’ve used this to create professional sketches for patent designs, tactical images and everything in between.
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Everything you need

Extremely easy to use and very good design. Arrows are easy to align, easy to create boxes and move them around, really the only app I have found that you can create good flowcharts on

Simplicty at its finest

It doesn’t require an engineering or math degree to figure out how to use this- which is perfect for me because I wanted to create home network and various diagrams and now can do that easily. It would be nice if they had a few more icons- but otherwise a great find! Love the syncing.

This app is terrible

The UI for the app is awful. It's borderline unusable. you can;'t even adjust the size of text boxes efficiently. Text disapears, and reappears, you can't see half of the stuff you've typed. Don't bother downloading.

Can't recommend because of notifications

It is a great app, very intuitive and easy to use. It has a great UI and I really wish I could keep using it. But the notifications make it unbearable. All I want is an app that allows me to design some things offline and this app does that. HOWEVER, everytime you open or one of your diagrams, it will prompt you over and over that you can only create 5 diagrams offline and you need to upgrade to the online edition to get around this. Everytime I open the app or a diagram, I have to clear 5 notifications stacked on top of each other just to use it. I appreciate the notification, but could please make it so once the user dismisses it, it stays gone!!! I would love to use this app again in the future!
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FAQ

What is Lekh?

Lekh is an online whiteboard and intelligent diagramming tool. It allows users to create diagrams, flowcharts, wireframes, and inspection reports on an infinite canvas. The app features smart recognition technology that converts rough sketches into precise shapes and connections.

What types of diagrams can I create with Lekh?

You can create a wide variety of diagrams, including flowcharts, block diagrams, network diagrams, inspection reports, floor plans, swimlane diagrams, business process maps, UI wireframes, mindmaps, UML, ERD, sequence diagrams, state diagrams, use cases, data flow diagrams, org charts, and cloud architectures.

Is Lekh free to use?

The application offers a free tier with in-app purchases for additional features or capabilities. Specific pricing details for in-app purchases can be found within the app or on its official website.

Can I use Lekh offline?

Yes, Lekh supports both online and offline modes. In offline mode, all your drawings and diagrams are saved directly to your device, and no internet connection is required. Online mode allows for cloud storage and real-time collaboration.

What devices is Lekh compatible with?

Lekh is a cross-platform application that works on a wide range of devices, including web browsers. This means you can access and use your diagrams from various devices, whether online or offline.