# Math Flash Cards vs OpoCentro

The clearest difference is update cadence: OpoCentro at every 4 days against Math Flash Cards's monthly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Math Flash Cards sells 6 in-app purchases, starting at $2.99 per month and OpoCentro sells 4 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

Math Flash Cards ships an update monthly, OpoCentro every 4 days. The most recent releases landed on October 16, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Math Flash Cards | OpoCentro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (4 ratings)](https://appshunter.io/ios/app/math-flash-cards-mathx/id6762158994/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 4 days** |
| Monetization | Free with in-app purchases | — |
| Size | 3 MB | 28 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sandratra Razafindralambo](https://appshunter.io/developer/556442767) | [Rasmus Lantz](https://appshunter.io/developer/1835161840) |

## What reviewers say

### Math Flash Cards

[App page](https://appshunter.io/ios/app/math-flash-cards-mathx/id6762158994)

This app offers fast, focused sessions to improve mental math skills. Users can practice various operations, customize difficulty, and track their progress with instant feedback. It's designed for daily practice to build number fluency and confidence.

**Highlights:** Practice addition, subtraction, multiplication, division, Customizable difficulty levels, Keypad or multiple choice input, Instant feedback and session summaries, Progress tracking over time, Offline functionality

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MathX Pro (Monthly) | $2.99 | per month |
| MathX Pro (Annual) | $17.99 | per year |
| Starter Upgrade | $7.99 | one-time |
| Discounted Upgrade | $9.99 | one-time |
| Pro Upgrade | $12.99 | one-time |
| MathX Pro (Lifetime) | $24.99 | one-time |


### OpoCentro

[App page](https://appshunter.io/ios/app/opocentro-tests-mossos/id6811835507)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OpoCentro Pro mensual | $6.99 | per month |
| OpoCentro Pro trimestral | $17.99 | per 3 months |
| OpoCentro Pro semestral | $29.99 | per 6 months |
| OpoCentro Pro anual | $49.99 | per year |


## Frequently asked questions

### Is Math Flash Cards free?

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

### Is OpoCentro free?

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

### Do Math Flash Cards or OpoCentro have ads?

Neither Math Flash Cards nor OpoCentro shows ads.

### Which is updated more often, Math Flash Cards or OpoCentro?

Math Flash Cards ships an update monthly, and OpoCentro every 4 days. Most recently, Math Flash Cards was updated on October 16, 2026 and OpoCentro on October 21, 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.*