You need a Jailbroken device

Jailbreak your iPhone, iPad or iPod touch more info here.

You can add our repo on Cydia

  1. Open Cydia
  2. Tap on Sources
  3. Tap on Edit / Tap on Add
  4. Write:
  5. Tap on Add sources / Tap on Add anyway
  6. Tap on Done.
  7. ▶︎ Play video

Now you can install Callisto (iOS 9/8) from Cydia

  1. Tap on Search tab
  2. Type Callisto (iOS 9/8)
  3. Choose the result with our icon on left
  4. Well now tap on Install.

Callisto (iOS 9/8)

Find it for free on Cydia.