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· 2 min read
Carl Liu

This is an introduction blog to some knowledge (basic) and vocabs I have learnt at Presence.

App's Skill Radar

  • For any Mobile/Web/Internet startup, you need to know your advantages and disadvantages just so you don't get lured down a blind alley.
  • This is appliable not only to Mobile Apps, but also to any modern startups (i.e. Website for delivery call, aka. Doordash/Palo Altos Delivery)


  • Cost Per Install:
    • Web: 0$
  • Top tier compnay examples
    • Any web era startups: Google, Yahoo, Portal sites


  • How fast does the product spread, is it exponential or linear?
  • Top tier compnay examples
    • Uber, UberEats

Screen Time

  • How long does your user spend on your app
  • Top tier company examples
    • Tiktok -> 100 Mins
    • FB -> 45 Mins
    • Bytedance Toutiao -> 75 Mins