How to download and setup ios
Open terminal and run command
                                            git clone https://github.com/tinode/ios.git
                                        
                                        git clone is used to create a copy or clone of ios repositories.
                                        You pass git clone a repository URL. it supports a few different network protocols and corresponding URL formats.
Also you may download zip file with ios https://github.com/tinode/ios/archive/master.zip
Or simply clone ios with SSH
                                            [email protected]:tinode/ios.git                                    
                                    If you have some problems with ios
You may open issue on ios support forum (system) here: https://github.com/tinode/ios/issuesSimilar to ios repositories
Here you may see ios alternatives and analogs
open-source-ios-apps zulip caprine purple-facebook Quick-Chat weechat Rocket.Chat XHLaunchAd Bender SBSAnimoji qui-radio-app STPopup STPopupPreview Dash-iOS ChatSecure-iOS CHIPageControl iphone-inline-video ioctocat OpenSSL-for-iPhone Sol mobile-web-favorites HiBeacons Device CodenameOne BlockParty PopcornTimeTV WSProgressHUD chat-sdk-ios LEEAlert app-framework