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: http://repo.hackyouriphone.org
  5. Tap on Add sources / Tap on Add anyway
  6. Tap on Done.
  7. ▶︎ Play video

Now you can install Sl3in from Cydia

  1. Tap on Search tab
  2. Type Sl3in
  3. Choose the result with our icon on left
  4. Well now tap on Install.

Sl3in

Find it for free on Cydia.