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Logic 101

Logic 101
  • #: 154430
  • Price: $1.99 In Apple Store
  • Category: Education
  • Updated: 2016-03-10
  • Current Version: 2.0
  • 2.0
  • Size: 0.10 MB
  • Language: English
  • Seller: D. Johnston
  • Requirements: Compatible with iPhone, iPod touch, and iPad. Requires iOS 3.0 or later
  • © D.K. Johnston
  •  Add to Favorite apps



You thought logic would be easier than math. Now you're doing derivations and it's too late to drop the course. This app is for you.

- Checks the syntax of symbolic sentences.

- Tests whether the derivation is complete.

- Derivable lines are coloured blue; hypotheses are coloured green.

- Provides an annotation of the derivation, showing line justifications.

- Annotated derivations can be emailed as RTF files.

See the complete app help files here:


See a list of the app's selectable derivation rules here:


What's New in Version 2.0

- Completely re-written for iOS 9.
- Logical notation and derivation rules can both be chosen to match your textbook.
- Help files have been added.
- Can be used in both portrait and landscape orientations.

iPhone Screenshots

Logic 101 iPhone Screenshot 1
Logic 101 iPhone Screenshot 2
Logic 101 iPhone Screenshot 3
Logic 101 iPhone Screenshot 4
Logic 101 iPhone Screenshot 5

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The information may be outdated (2017-03-08 04:13:16). For actual information go to iTunes

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