# Mental Math vs Army Officer Selection Prep

The clearest difference is update cadence: Mental Math at fortnightly against Army Officer Selection Prep's every 2 months. 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 Army Officer Selection Prep sells 3 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

Mental Math ships an update fortnightly, Army Officer Selection Prep every 2 months. The most recent releases landed on October 24, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Mental Math | Army Officer Selection Prep |
| --- | --- | --- |
| 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** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 17 MB | 6 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [LMT Digital Creations](https://appshunter.io/developer/640455461) | [MD Shahariar Nazim Joy](https://appshunter.io/developer/1893961943) |

## 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 |


### Army Officer Selection Prep

[App page](https://appshunter.io/ios/app/army-officer-selection-prep/id6793860549)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $6.99 | per month |
| Yearly Premium | $19.99 | per year |
| Lifetime Access | $29.99 | one-time |


## Frequently asked questions

### Is Mental Math free?

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

### Is Army Officer Selection Prep free?

Army Officer Selection Prep is free to download, with in-app purchases available.

### Do Mental Math or Army Officer Selection Prep have ads?

Neither Mental Math nor Army Officer Selection Prep shows ads.

### Which is updated more often, Mental Math or Army Officer Selection Prep?

Mental Math ships an update fortnightly, and Army Officer Selection Prep every 2 months. Most recently, Mental Math was updated on October 24, 2026 and Army Officer Selection Prep on October 17, 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.*