# Mental Math vs Physics Zen

The clearest difference is update cadence: Physics Zen at daily against Mental Math's fortnightly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Mental Math sells 2 one-off in-app purchases and Physics Zen sells 5 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Mental Math ships an update fortnightly, Physics Zen daily. The most recent releases landed on October 21, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Mental Math | Physics Zen |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/mental-math-kalc/id6764098294/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Daily** |
| Monetization | Free with in-app purchases | — |
| Size | 17 MB | 269 MB |
| Requires iOS | 17.6 | **16.4** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [LMT Digital Creations](https://appshunter.io/developer/640455461) | [Ivan Terekhin](https://appshunter.io/developer/888645337) |

## What reviewers say

### Mental Math

[App page](https://appshunter.io/ios/app/mental-math-kalc/id6764098294)

Sharpen your mental math skills with daily practice. This app uses spaced repetition to help you master concepts like fractions, percentages, and algebra. It offers two modes for flexible learning and provides real-life examples of how math is used every day.

**Highlights:** Spaced repetition system (SRS), Covers multiplication, division, fractions, percentages, algebra, Zen and Chrono practice modes, Visible progress tracking, Real-life math examples, Home screen widgets, Customizable reminders

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plan Annuel | $17.99 | one-time |
| Accès à vie | $29.99 | one-time |


### Physics Zen

[App page](https://appshunter.io/ios/app/physics-zen-learn-and-practice/id6808595963)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Physics Zen Weekly | $3.99 | per 7 days |
| Physics Zen Monthly | $6.99 | per month |
| Physics Zen Annual | $29.99 | per year |
| Physics Zen Lifetime | $24.99 | one-time |
| Physics Zen Lifetime | $39.99 | one-time |


## Frequently asked questions

### Is Mental Math free?

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

### Is Physics Zen free?

Physics Zen is free to download, with in-app purchases available.

### Do Mental Math or Physics Zen have ads?

Neither Mental Math nor Physics Zen shows ads.

### Which is updated more often, Mental Math or Physics Zen?

Mental Math ships an update fortnightly, and Physics Zen daily. Most recently, Mental Math was updated on October 21, 2026 and Physics Zen on October 12, 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.*