App development · lesson 23 of 24 · free

Privacy, permissions and publishing — App development for students

Before an app is published, two things matter. Privacy: an app should ask only for the permissions its job needs — a map needs location, a scanner needs the camera, but a torch never needs your contacts. Publishing: every release gets a version number major.minor.patch. A bug fix adds 1 to the patch, a new feature adds 1 to the minor, a big change adds 1 to the major. Compare versions number by number, never as text: 1.10.0 is newer than 1.2.0.

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Got it? Practise ↓

Developer's tip

Need it? Number it. — “ask only for permissions the app needs; compare versions number by number”

  1. Ask only for permissions the app’s main job needs, and say why.
  2. Version = major.minor.patch. Bug fix → patch + 1; new feature → minor + 1, patch 0; big change → major + 1, others 0.
  3. Compare major, then minor, then patch as numbers: 10 is bigger than 9.

Use it for: Publishing your app, reading update notes and deciding whether to allow a permission.

Worked example: 🚀 Which version is newer: 1.5.3 or 1.10.0? → 1.10.0

  1. The majors are the same (1), so compare the minors: 5 and 10.
  2. 10 is bigger than 5, so 1.10.0 is newer (the patch does not matter).

Check: A bug fix after 1.10.0 would be 1.10.1 ✓

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✏️ Practice

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🏁 Lesson 23 test

20 questions. Check each answer, then go to the next one. Get 16 or more right to pass.

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🖨️ App Dev Worksheet: Permissions and Versions

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