StackShareStackShare
Follow on
StackShare

Discover and share technology stacks from companies around the world.

Follow on

© 2025 StackShare. All rights reserved.

Product

  • Stacks
  • Tools
  • Feed

Company

  • About
  • Contact

Legal

  • Privacy Policy
  • Terms of Service
  1. Stackups
  2. Utilities
  3. Mobile Analytics
  4. Mobile Runtime Inspector
  5. FLEX vs Facebook Sonar

FLEX vs Facebook Sonar

OverviewComparisonAlternatives

Overview

FLEX
FLEX
Stacks18
Followers13
Votes1
Facebook Sonar
Facebook Sonar
Stacks10
Followers11
Votes0

Facebook Sonar vs FLEX: What are the differences?

What is Facebook Sonar? Extensible mobile app debugger. Sonar is a platform for debugging mobile apps on iOS and Android. Visualize, inspect, and control your apps from a simple desktop interface. Use Sonar as is or extend it using the plugin API.

What is FLEX? In-app debugging tool for iOS, inspect and modify views in the hierarchy. FLEX (Flipboard Explorer) is a set of in-app debugging and exploration tools for iOS development. When presented, FLEX shows a toolbar that lives in a window above your application. From this toolbar, you can view and modify nearly every piece of state in your running application.

Facebook Sonar and FLEX can be categorized as "Mobile Runtime Inspector" tools.

Facebook Sonar and FLEX are both open source tools. It seems that FLEX with 10.5K GitHub stars and 1.2K forks on GitHub has more adoption than Facebook Sonar with 5.34K GitHub stars and 292 GitHub forks.

Share your Stack

Help developers discover the tools you use. Get visibility for your team's tech choices and contribute to the community's knowledge.

View Docs
CLI (Node.js)
or
Manual

Detailed Comparison

FLEX
FLEX
Facebook Sonar
Facebook Sonar

FLEX (Flipboard Explorer) is a set of in-app debugging and exploration tools for iOS development. When presented, FLEX shows a toolbar that lives in a window above your application. From this toolbar, you can view and modify nearly every piece of state in your running application.

Sonar is a platform for debugging mobile apps on iOS and Android. Visualize, inspect, and control your apps from a simple desktop interface. Use Sonar as is or extend it using the plugin API.

Inspect and modify views in the hierarchy.;See the properties and ivars on any object.;Dynamically modify many properties and ivars.;Dynamically call instance and class methods.;Access any live object via a scan of the heap.;View the file system within your app's sandbox.;Explore all classes in your app and linked systems frameworks (public and private).;Quickly access useful objects such as [UIApplication sharedApplication], the app delegate, the root view controller on the key window, and more.;Dynamically view and modify NSUserDefaults values.
Mobile development - Sonar aims to be your number one companion for mobile app development on iOS and Android. Therefore, we provide a bunch of useful tools including a log viewer, interactive layout inspector, and network inspector.; Extending Sonar - Sonar is built as a platform. In addition to using the tools already included, you can create your own plugins to visualize and debug data from your mobile apps. Sonar takes care of sending data back and forth, calling functions, and listening for events on the mobile app.
Statistics
Stacks
18
Stacks
10
Followers
13
Followers
11
Votes
1
Votes
0
Pros & Cons
Pros
  • 1
    True Native iOS Builds
No community feedback yet

What are some alternatives to FLEX, Facebook Sonar?

PonyDebugger

PonyDebugger

PonyDebugger is a remote debugging toolset. It is a client library and gateway server combination that uses Chrome Developer Tools on your browser to debug your application's network traffic and managed object contexts. To use PonyDebugger, you must implement the client in your application and connect it to the gateway server. There is currently an iOS client and the gateway server.

Stetho

Stetho

Stetho is a sophisticated debug bridge for Android applications. When enabled, developers have access to the Chrome Developer Tools feature natively part of the Chrome desktop browser. Developers can also choose to enable the optional dumpapp tool which offers a powerful command-line interface to application internals.

Reveal App

Reveal App

Reveal brings the power of tools like Firebug and Web Inspector to iOS developers. See your application's view hierarchy at runtime with advanced 2D and 3D visualisations. Debug view layout and rendering problems in seconds.

Related Comparisons

Postman
Swagger UI

Postman vs Swagger UI

Mapbox
Google Maps

Google Maps vs Mapbox

Mapbox
Leaflet

Leaflet vs Mapbox vs OpenLayers

Twilio SendGrid
Mailgun

Mailgun vs Mandrill vs SendGrid

Runscope
Postman

Paw vs Postman vs Runscope