let's zack

Zack turns your iPhone into your own mobile cinema: combine up to three phones and watch your own videos on one big screen. Show what you can do with your iPhone: let’s zack!

Do you often show your friends and family your iPhone films and YouTube clips? Then you know how annoying the small mobile screens can be: the awesome GoPro-footage from the last weekend or the exciting TV series just simply do not inspire awe on a tiny screen.

Why not experience the visuals together on a big screen?

With zack, you have the large screen to make video streaming a truly amazing experience! Just put two or three phones next to each other and suddenly, you have the screen size you have always wished for. Lean back, relax and enjoy the luxurious feeling of not having to crowd around a miniature screen.

To zack, you need: Two or three phones with iOS 9 and zack on all participating devices

The reason why zack is great:
+ Only three clicks to a cinema experience
+ Quick and safe installation
+ Your data belongs to you!


Three friends, three iPhone, and zack! You can show your favorite videos in a way that you never previously have experienced.

Zack runs on iOS 9 and preferentially on three iPhone 6 or 6s. To be able to zack your videos (from the camera roll), the WLAN must be ON, but the phones do not have to be logged into a WLAN net. The Bluetooth must be turned OFF.

If you would like to zack videos from the internet, you need a stable connection and sufficient download speed on all participating phones. Of course, the phones should be charged and have access to the internet. If all phones are connected to a WLAN with low data transfer rates, there might be delays in the display of the video – not much we can do about that. However, with a good connection, you can zack great or funny videos (YouTube, Vimeo, GoPro, etc.) from the internet, or let´s zack livestream.

Zack allows you to zoom the video during the playing process. Just use two fingers to zoom or move the video around on the screens – just try it out! On the master phone, you can play forward the film as well as rewind and manually synchronize the video with the pause button.

Have fun and be playful:
Let’s zack!

You can zack using these devices running on iOS 9

+++ perfect: iPhone 6/6s and 6/6s Plus
++ good: iPhone 5s
+ OK: iPhone 5
- Not supported: iPhone 4s or older, iPad

Zack macht Euer iPhone zum mobilen Kino: Kombiniere bis zu drei Geräte und zeig dein selbstgedrehtes Video auf einem einzigen großen Screen. Zeig was du mit deinem iPhone kannst: let´s zack.

Zeigst du deinen Freunden gerne unterwegs Dein selbst gedrehtes Videos oder die neuesten YouTube-Perlen? Den GoPro-Mitschnitt vom Wochenende oder den Trailer zur Lieblingsserie? Dann kennst du das Problem: Alle beugen sich über einen winzigen Bildschirm.

Jemanden einladen und einfach zusammen ein cooles Video anschauen - gemeinsam was erleben.

Gemeinsam habt Ihr unterwegs einen großen Screen und macht Video-Streaming zum gemeinsamen Erlebnis: Einfach zwei oder drei Telefone nebeneinander legen und schon bekommt dein Video die Bildschirmgröße, die es verdient. Lehnt euch entspannt zurück, denn jetzt klebt ihr nicht mehr verkrampft am Handyscreen.

Um zacken zu können, braucht ihr zwei bis drei iPhone unter iOS 9 und natürlich die App auf allen teilnehmenden Geräten.

Warum zack so gut ist:
+ nur drei Klicks bis zum mobilen Kino-Erlebnis
+ schnelle, sichere Einrichtung
+ eure Daten gehören euch

Drei Freunde, drei iPhone und zack: Ihr zeigt euer Lieblingsvideo, so wie ihr es noch nie gezeigt habt.

更新履歴
+ solve issues in client discovery

+ support mix of different screen sizes

+ improve playback synchronization