Free and open first

Best Cross-Platform App Development Frameworks in 2026

62 apps
Research read 9 Oct 2026
How the order is worked out

1

B4X

Free plan AndroidiPhoneLinux+2

B4X spans mobile, desktop, server and IoT development, with free tools and paid licenses. Review B4i's requirements and hosted builder limit if iOS development is part of your plans.

7.7 Free plan · paid from $59 Visit site
2

Felgo
by Felgo
Free plan AndroidAPIExtension+5

Felgo combines cross-platform app development, game tools, and device integrations in a Qt-based SDK. Review the annual turnover limits and billing terms for the license that fits your organization.

7.5 Free plan · paid from €79/mo (annual) Visit site
3

GitHub CodeQL

Free plan ExtensionLinuxMac+3

7.4 Free plan · paid from $30/mo Visit site
4

Haxelib
by Haxelib
Free plan APILinuxMac+1

Choose Haxelib if you develop with Haxe and want a free library manager for central, private, or local libraries.

7.4 Free plan Visit site
5

Ionic Framework

Free plan AndroidiPhoneWeb

Choose Ionic Framework if you want a free, MIT-licensed toolkit for building mobile and web apps with one codebase and web languages.

7.2 Free plan Visit site
6

Lazarus

Free plan LinuxMacWindows

Pick Lazarus for a free Free Pascal IDE that combines visual form design with editing, building, debugging, and testing.

7.2 Free plan Visit site
7

Avalonia

Free plan AndroidiPhoneLinux+3

7.1 Free plan · paid from €299/user/yr Visit site
8

Qt Creator

Free plan AndroidiPhoneLinux+3

Qt Creator covers editing, builds, testing, and debugging across several application targets.

7.1 Free plan · paid from €546/user/yr Visit site
9

Framework7 Icons

Free plan Web

Framework7 Icons offers a free, separately installed icon font with several web-friendly formats and framework integrations.

7.0 Free plan Visit site
10

Tauri Bundler

Free plan AndroidiPhoneLinux+2

Tauri Bundler provides packaging routes across desktop and mobile platforms, with command-line and CI guidance.

7.0 Free plan Visit site
11

Xojo

Free plan AndroidiPhoneLinux+3

Xojo offers a shared development environment for desktop, web, and mobile targets, with a visual mobile layout editor and device access.

6.9 Free plan · paid from $499 Visit site
12

Ultimate++

Free plan LinuxMacWindows

Ultimate++ combines a broad C++ toolset with package management and multiple compiler choices at no cost. Mobile support is limited, and macOS debugging has a documented issue.

6.8 Free plan Visit site
13

Smartface

Free plan AndroidiPhoneLinux+3

Smartface brings app design, coding, previews, debugging, and release tools into a development platform for native iOS and Android apps.

6.7 Free plan Visit site
14

Compose Multiplatform

Free plan AndroidiPhoneLinux+3

6.6 Free plan Visit site
15

Apache Cordova

Free plan AndroidiPhoneWeb

6.5 Free plan Visit site
16

BeeWare

Free plan AndroidiPhoneLinux+3

6.5 Free plan Visit site
17

Dioxus

Free plan AndroidiPhoneLinux+3

6.5 Free plan Visit site
18

AtomJS

Free plan LinuxMacWindows

6.4 Free plan Visit site
19

Capacitor

Free plan AndroidiPhoneWeb

6.4 Free plan Visit site
20

CopperSpice

Free plan LinuxMacWindows

6.4 Free plan Visit site
21

Enlightenment Foundation Libraries

Free plan LinuxMacWindows

6.4 Free plan Visit site
22

Flet

Free plan AndroidiPhoneLinux+3

6.4 Free plan · paid from $25/mo Visit site
23

Flutter
by Google
Free plan WebWindowsMac+3

6.4 Free plan Visit site
24

Fyne

Free plan AndroidiPhoneLinux+3

6.4 Free plan Visit site
25

Dear PyGui

Free plan LinuxMacWindows

6.3 Free plan Visit site

#1Places #1, #2, #3, #4, #5 on this list can be bought by the makers of the software on it. See the price

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