# Vigenere Shift Plus vs Quantum Mechanics

The clearest difference is price: Quantum Mechanics at Free against Vigenere Shift Plus's $0.99. Quantum Mechanics also leads on rating (4.5 vs 3.3) and ratings volume (179 vs 3). On ads, in-app purchases and device support there is nothing between them.

Quantum Mechanics is free to download; Vigenere Shift Plus costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Quantum Mechanics holds the better App Store score, 4.5 against 3.3. That said, the two scores are not equally well evidenced: Quantum Mechanics has 179 ratings behind it against 3, so its average is the more settled of the two.

Vigenere Shift Plus ships an update every 3 months, Quantum Mechanics every 3 weeks. The most recent releases landed on November 1, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Vigenere Shift Plus | Quantum Mechanics |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [3.3 (3 ratings)](https://appshunter.io/ios/app/vigenere-shift-plus/id951306959/reviews) | **[4.5 (179 ratings)](https://appshunter.io/ios/app/quantum-mechanics-theories/id1159692911/reviews)** |
| Number of ratings | 3 | **179** |
| Positive reviews | — | 43.5% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Paid | **Free** |
| Size | 6 MB | 50 MB |
| Requires iOS | 13.0 | **9.0** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [a Rausa](https://appshunter.io/developer/638439637) | [Vitalii Gryniuk](https://appshunter.io/developer/1007630419) |

## What reviewers say

### Vigenere Shift Plus

[App page](https://appshunter.io/ios/app/vigenere-shift-plus/id951306959)

Encrypt and decrypt text messages using the Vigenère cipher. This application provides a straightforward tool for applying this historical encryption method to your messages.

**Highlights:** Encrypt messages, Decrypt messages, Vigenère cipher implementation, Simple user interface, Text encryption tool

**Features:** Vision Pro support

**In-app purchases:** none


### Quantum Mechanics

[App page](https://appshunter.io/ios/app/quantum-mechanics-theories/id1159692911)

Explore various theories on the model and structure of atoms. This app details concepts like atomic postulates, photon mechanisms, and models for hydrogen, helium, lithium, beryllium, boron, carbon, nitrogen, and oxygen. It also covers related physics principles such as gravity, electromagnetism, and time.

**Highlights:** Atomic structure theories, Models of various elements, Photon mechanism explanations, Gravity and electromagnetism concepts, Time and electricity principles, Mathematical algorithms

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Vigenere Shift Plus free?

Vigenere Shift Plus costs $0.99, with no in-app purchases.

### Is Quantum Mechanics free?

Quantum Mechanics is free to download, with no in-app purchases.

### Which has better reviews, Vigenere Shift Plus or Quantum Mechanics?

Quantum Mechanics is rated higher. Vigenere Shift Plus averages 3.3 out of 5 from 3 ratings, while Quantum Mechanics averages 4.5 from 179 ratings.

### Do Vigenere Shift Plus or Quantum Mechanics have ads?

Neither Vigenere Shift Plus nor Quantum Mechanics shows ads.

### Which is updated more often, Vigenere Shift Plus or Quantum Mechanics?

Vigenere Shift Plus ships an update every 3 months, and Quantum Mechanics every 3 weeks. Most recently, Vigenere Shift Plus was updated on November 1, 2026 and Quantum Mechanics on November 6, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*