# Allen Prep vs Interactive Quantum Mechanics

The clearest difference is update cadence: Interactive Quantum Mechanics at fortnightly against Allen Prep's every 5 weeks. Allen Prep's advantage is iOS requirement (16.6 vs 26.2). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Allen Prep sells 12 in-app purchases, starting at $0.99 per 7 days and Interactive Quantum Mechanics sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Allen Prep ships an update every 5 weeks, Interactive Quantum Mechanics fortnightly. The most recent releases landed on September 23, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Allen Prep | Interactive Quantum Mechanics |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 9.7% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Fortnightly** |
| Monetization | Free with in-app purchases | — |
| Size | 106 MB | 10 MB |
| Requires iOS | **16.6** | 26.2 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Allen Resources, Inc.](https://appshunter.io/developer/341335823) | [Stephen Moon](https://appshunter.io/developer/6786831121) |

## What reviewers say

### Allen Prep

[App page](https://appshunter.io/ios/app/allen-prep-max-your-score/id605476662)

Prepare for your exams with a comprehensive question bank featuring multiple-choice questions, answers, and detailed rationales. Track your performance, identify weak areas, and customize your study sessions with adaptive learning technology.

**Highlights:** Extensive question bank, Detailed answers and rationales, Performance tracking and statistics, Customizable testing options, Adaptive learning technology, Review missed and least-seen questions, Test-taking strategies and advice

**Features:** Family Sharing, Vision Pro support

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Questions, Answers & Rationale | $0.99 | per 7 days |
| Unlimited Access | $0.99 | per month |
| TestBank Total Access | $3.49 | per month |
| TestBank Total Access | $6.99 | per 7 days |
| TestBank Total Access | $6.99 | per 7 days |
| Total Access Enabled | $9.99 | per 7 days |
| Complete TestBank of Questions | $19.99 | per month |
| Full TestBank Access | $19.99 | per month |
| 12,383 Exam Questions, Answers | $49.99 | per 3 months |
| Unlimited Access to Questions | $54.99 | per 3 months |
| TestBank Annual Access | $99.99 | per year |
| Premium TestBank of Questions | $189.99 | per year |

**What reviewers like**

- 👍 Helpful for DMV preparation
- 👍 Questions similar to actual test
- 👍 Covers handbook essentials

**What reviewers complain about**

- 💸 Charged without authorization
- 💸 Difficult to cancel subscription
- 💸 Misleading advertising (not free)
- 💸 Automatic billing after trial
- 💸 Unexpected recurring charges

**Reported bugs**

- Does not allow correct answer to be processed
- App does not open
- App crashes every time
- Glitch in system for add-on purchases

**Requested features**

- Make screen flipping possible for study guide
- Provide explanations for incorrect answers
- Show signs when asking sign-related questions
- Increase font size on iPad
- Option to not reveal correct/incorrect until end


### Interactive Quantum Mechanics

[App page](https://appshunter.io/ios/app/interactive-quantum-mechanics/id6786831119)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Founder's Pass | $14.99 | one-time |


## Frequently asked questions

### Is Allen Prep free?

Allen Prep is free to download, with in-app purchases available.

### Is Interactive Quantum Mechanics free?

Interactive Quantum Mechanics is free to download, with in-app purchases available.

### Do Allen Prep or Interactive Quantum Mechanics have ads?

Neither Allen Prep nor Interactive Quantum Mechanics shows ads.

### Which is updated more often, Allen Prep or Interactive Quantum Mechanics?

Allen Prep ships an update every 5 weeks, and Interactive Quantum Mechanics fortnightly. Most recently, Allen Prep was updated on September 23, 2026 and Interactive Quantum Mechanics on September 19, 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.*