# Second Grade Math Trainer vs Memorize Prime Numbers

The clearest difference is price: Memorize Prime Numbers at Free against Second Grade Math Trainer's $2.99. Second Grade Math Trainer's advantage is ads (none vs shown) and iOS requirement (12.0 vs 16.6). On update cadence, in-app purchases and device support there is nothing between them.

Memorize Prime Numbers is free to download; Second Grade Math Trainer costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Second Grade Math Trainer ships an update every 26 months, Memorize Prime Numbers every 14 months. The most recent releases landed on November 6, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | Second Grade Math Trainer | Memorize Prime Numbers |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | — | **[3.0 (2 ratings)](https://appshunter.io/ios/app/memorize-prime-numbers/id6475699754/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 26 months | **Every 14 months** |
| Monetization | — | Ad-supported |
| Size | 17 MB | 84 MB |
| Requires iOS | **12.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Sergey Malugin](https://appshunter.io/developer/562782409) | [Oscar Tsang](https://appshunter.io/developer/416987065) |

## What reviewers say

### Second Grade Math Trainer

[App page](https://appshunter.io/ios/app/second-grade-math-trainer/id1312646153)

**Features:** macOS Compatibility

**In-app purchases:** none


### Memorize Prime Numbers

[App page](https://appshunter.io/ios/app/memorize-prime-numbers/id6475699754)

Learn to memorize hundreds of prime numbers within a week using a provided method. This app offers a unique approach to remembering these special numbers.

**Highlights:** Memorize hundreds of prime numbers, Learn a provided memorization method, Focus on prime number recall, Suitable for quick learning

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

**In-app purchases:** none


## Frequently asked questions

### Is Second Grade Math Trainer free?

Second Grade Math Trainer costs $2.99, with no in-app purchases.

### Is Memorize Prime Numbers free?

Memorize Prime Numbers is free to download, with no in-app purchases.

### Do Second Grade Math Trainer or Memorize Prime Numbers have ads?

Memorize Prime Numbers shows ads; Second Grade Math Trainer does not.

### Which is updated more often, Second Grade Math Trainer or Memorize Prime Numbers?

Second Grade Math Trainer ships an update every 26 months, and Memorize Prime Numbers every 14 months. Most recently, Second Grade Math Trainer was updated on November 6, 2026 and Memorize Prime Numbers on November 8, 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.*