# The Logic Calculator

> Propositional logic operations and truth table generation tool. (iPhone/iPad app by Ioannis Votsis.)

- Source: https://appshunter.io/ios/app/the-logic-calculator/id1484264087 (this page in markdown: same URL + `.md`)
- Developer: [Ioannis Votsis](https://appshunter.io/developer/1484264086)
- Category: Utilities, Education
- Price: Free
- Rating: 4.43/5 from 7 App Store ratings · 6 written reviews indexed
- Age rating: 4+
- Requires: iOS 9.0 · 30 MB
- Released: 2019-10-22
- Data updated: 2026-08-09
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/the-logic-calculator/id1484264087/reviews.md

## What is The Logic Calculator?

This free app allows users of propositional logic to perform operations with the same ease as that offered by a mathematical calculator. It facilitates learners of logic by providing considerable feedback. To be precise, using this app, one can determine whether: (1) input is well-formed and, if not, why not, (2) sentences are tautologies, contradictions or contingent, (3) sets of sentences are consistent or inconsistent and (4) arguments are valid or invalid. It also produces truth tables which can be copied into other applications. As of this version, the calculator is restricted to semantic operations.

## Key features

- Propositional logic operations
- Input well-formedness checking
- Tautology, contradiction, and contingency determination
- Set consistency checking
- Argument validity checking
- Truth table generation
- Copyable truth tables

## Recent user reviews (6 of 6)

All indexed reviews: https://appshunter.io/ios/app/the-logic-calculator/id1484264087/reviews.md

### 5/5 — Wow! Essential

*2025-10-01*

Such an excellent tool. I highly recommend this app for logic lovers.

### 5/5 — Love it

*2024-11-14*

100% accurate

### 5/5 — Useful, simple

*2022-10-03*

Wonderful app, works perfectly

### 5/5 — 10/10

*2020-09-11*

I’ve tried three different truth table applications and this one has been the best so far. Very easy to use and accurate.

### 5/5 — superb app

*2019-10-24, version 1.0*

an excellent app. the layout makes it super intuitive for users who already familiar with iOS calculator. looking forward to now finally learning logic!

### 5/5 — Great app!

*2019-10-24, version 1.0*

Intuitive interface, works well and it’s free. Need I say more?

## Frequently asked questions about The Logic Calculator

### What can The Logic Calculator determine?

The Logic Calculator can determine if input is well-formed and why, if sentences are tautologies, contradictions, or contingent, if sets of sentences are consistent or inconsistent, and if arguments are valid or invalid.

### Does The Logic Calculator have ads?

No, The Logic Calculator is ad-free, allowing for an uninterrupted user experience.

### What devices does The Logic Calculator support?

The Logic Calculator is available for iPhone, iPad, and iPod devices.

### How often is The Logic Calculator updated?

The Logic Calculator was last updated on November 28, 2019, with version 1.1.

### What is the age rating for The Logic Calculator?

The Logic Calculator has an age rating of 4+, making it suitable for a wide range of users.

### Can I copy truth tables from The Logic Calculator?

Yes, The Logic Calculator produces truth tables that can be copied into other applications for further use or documentation.

### What kind of logic operations does The Logic Calculator perform?

The Logic Calculator is restricted to semantic operations within propositional logic, offering a focused tool for logical analysis.

### What do users like about The Logic Calculator?

Users appreciate the app's ability to provide considerable feedback and perform logical operations with the ease of a mathematical calculator, as indicated by its 4.4-star rating.

## Version history (last 2 releases)

### 1.1 — 2019-11-28

* Bug Fixes
* More Examples of How to Use the Calculator

### 1.0 — 2019-10-22

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-09.*