Latest 4.1
License MIT
Platforms osx 10.10, ios 9.0, tvos 9.2
Dependencies RxSwift, Action

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Boomerang is a (Rx)Swift micro-framework used to speed up and standardize MVVM (Model-View-ViewModel) native applications development.

Cocoapods Compatible
Carthage compatible

What is it?

Boomerang is a micro-framework that helps any developer with MVVM knowledge to standardize the development of an app (currently iOS and tvOS) through common best-practices and data structures.

It’s designed with Swift in mind, protocol friendly and tightly bound to RxSwift (as MVVM is not so meaningful without a proper DataBinding framework)

The main idea behind Boomerang is that any "screen" of the app (usually, but not always, a ViewController) can be represented by a list of views. Users will first ask to (re)load a set of data to be displayed and later interact with it.

Boomerang clears up all usual boilerplate (e.g: UICollectionView dataSource methods) by re-organizing how data is handled:

  • a UIViewController with a UICollectionView/UITableView is firstly created and associated (bind) to a ListViewModelType compliant object: a view model. The list view is also bound to the same view model.

  • the ModelLayer usually exposes an Observable of data (an array of Boomerang’s ModelType compliant objects) that gets triggered (subscribed) by ListViewModel
  • every model, according to developer’s need, is used to create a single ItemViewModelType view model for each model.

  • each item view model contains a ListIdentifier information that is automatically used by the list view to generate proper cells.

  • each cell is then bound to the ItemViewModel where actual properties are read and displayed.


  • iOS 9.0+ / Mac OS X 10.11+ / tvOS 9.2+ / watchOS 3.0+
  • Xcode 9.0+
  • Swift 4.0+
  • basic knowledge of RxSwift


Boomerang is entirely developed and open-sourced by Synesthesia.


Boomerang is MIT licensed.

Latest podspec

    "name": "Boomerang",
    "version": "4.1",
    "summary": "Swift microframework for MVVM",
    "description": "Boomerang is a swift microframework for better crossplatform apps",
    "homepage": "",
    "license": {
        "type": "MIT",
        "file": ""
    "authors": "Stefano Mondino",
    "platforms": {
        "osx": "10.10",
        "ios": "9.0",
        "tvos": "9.2"
    "source": {
        "git": "",
        "tag": "4.1"
    "source_files": "Sources/{.,Model,Router,ViewModel}/*.{swift,h,m}",
    "ios": {
        "source_files": "Sources/UIKit/{*,ios/*}.{swift}"
    "tvos": {
        "source_files": "Sources/UIKit/*.{swift}"
    "dependencies": {
        "RxSwift": [],
        "Action": []

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