# Quantum Mechanics vs phase estimation algorithm

The clearest difference is iOS requirement: Quantum Mechanics at 9.0 against phase estimation algorithm's 16.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Quantum Mechanics ships an update every 3 weeks, phase estimation algorithm monthly. The most recent releases landed on October 1, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Quantum Mechanics | phase estimation algorithm |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (178 ratings)](https://appshunter.io/ios/app/quantum-mechanics-theories/id1159692911/reviews)** | — |
| Number of ratings | **178** | — |
| Positive reviews | 43.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Free | — |
| Size | 50 MB | 12 MB |
| Requires iOS | **9.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Vitalii Gryniuk](https://appshunter.io/developer/1007630419) | [Sungjun Kim](https://appshunter.io/developer/1602461985) |

## What reviewers say

### 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


### phase estimation algorithm

[App page](https://appshunter.io/ios/app/phase-estimation-algorithm/id6469448415)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Quantum Mechanics free?

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

### Is phase estimation algorithm free?

phase estimation algorithm is free to download, with no in-app purchases.

### Do Quantum Mechanics or phase estimation algorithm have ads?

Neither Quantum Mechanics nor phase estimation algorithm shows ads.

### Which is updated more often, Quantum Mechanics or phase estimation algorithm?

Quantum Mechanics ships an update every 3 weeks, and phase estimation algorithm monthly. Most recently, Quantum Mechanics was updated on October 1, 2026 and phase estimation algorithm on October 3, 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.*