# Mental Math Trainer vs The Einstein Archive

The clearest difference is in-app purchases: The Einstein Archive at none against Mental Math Trainer's 9. The Einstein Archive also leads on rating (5.0 vs 4.5). Mental Math Trainer's advantage is ratings volume (233 vs 1). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Mental Math Trainer sells 7 in-app purchases, starting at $2.99 per month. The Einstein Archive asks for nothing beyond the download.

The Einstein Archive holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Mental Math Trainer has 233 ratings behind it against 1, so its average is the more settled of the two.

## The numbers

| Metric | Mental Math Trainer | The Einstein Archive |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (233 ratings)](https://appshunter.io/ios/app/mental-math-trainer-puremath/id684305542/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/the-einstein-archive/id6804042319/reviews)** |
| Number of ratings | **233** | 1 |
| Positive reviews | 57.8% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | — |
| Monetization | Free with in-app purchases | **Free** |
| Size | 50 MB | 48 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Stoyan Hristov](https://appshunter.io/developer/584595816) | [Felicity Enterprises LLC](https://appshunter.io/developer/1883166758) |

## What reviewers say

### Mental Math Trainer

[App page](https://appshunter.io/ios/app/mental-math-trainer-puremath/id684305542)

Enhance your arithmetic abilities with this app. Practice addition, subtraction, multiplication, and division through engaging games and custom sessions. Track your progress and challenge friends to boost your mental math confidence and speed.

**Highlights:** Addition, subtraction, multiplication, division practice, Math Arcade mode with increasing difficulty, Customizable practice sessions, Memory training games (Find the Pairs), Progress tracking, Game Center integration for challenges

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Access | $2.99 | per month |
| Unlimited Access | $2.99 | per 7 days |
| Unlimited Access | $3.99 | per month |
| Unlimited Access | $9.99 | per year |
| Unlimited Access | $12.99 | per year |
| Unlimited Access | $14.99 | per year |
| Unlock Everything | $17.99 | one-time |

**What reviewers like**

- 🧠 Brain training and mental sharpness
- 👍 Useful for math skills improvement
- 🚀 Fast and easy to use
- ✅ Good for daily practice
- 💡 Gamifies math learning

**What reviewers complain about**

- 💸 Most features are paid/locked
- 💰 Deceptive free version
- 😩 Repetitive questions/levels
- 🐌 Slow animations
- 📱 UI can be improved (keypad style)

**Reported bugs**

- App crashes or doesn't open
- Purchases not unlocking features
- In-app purchase issues
- Timer continues when paused
- Drag response not registering input

**Requested features**

- Option to choose keypad style
- More difficult levels
- Infinite or custom exercise mode
- Dark mode support
- Landscape mode support


### The Einstein Archive

[App page](https://appshunter.io/ios/app/the-einstein-archive/id6804042319)

Explore the life and scientific contributions of Albert Einstein through an interactive timeline, detailed maps, and high-resolution images of his work. This app offers a comprehensive, offline experience without requiring an account or internet connection.

**Highlights:** Interactive timeline of life and discoveries, Local search functionality, Map view of significant locations, Deep zoom image viewer, Save favorite content, Offline and private operation

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Mental Math Trainer free?

Mental Math Trainer is free to download, with in-app purchases available.

### Is The Einstein Archive free?

The Einstein Archive is free to download, with no in-app purchases.

### Which has better reviews, Mental Math Trainer or The Einstein Archive?

The Einstein Archive is rated higher. Mental Math Trainer averages 4.5 out of 5 from 233 ratings, while The Einstein Archive averages 5.0 from 1 ratings.

### Do Mental Math Trainer or The Einstein Archive have ads?

Neither Mental Math Trainer nor The Einstein Archive shows ads.

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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.*