# MindCalc Arithmetic Trainer vs NobleMinds Montessori

The clearest difference is update cadence: NobleMinds Montessori at every 2 months against MindCalc Arithmetic Trainer's every 21 months. NobleMinds Montessori also leads on iOS requirement (10.0 vs 15.4). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

MindCalc Arithmetic Trainer ships an update every 21 months, NobleMinds Montessori every 2 months. The most recent releases landed on October 23, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | MindCalc Arithmetic Trainer | NobleMinds Montessori |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.0 (12 ratings)](https://appshunter.io/ios/app/mindcalc-arithmetic-trainer/id306974064/reviews)** | — |
| Number of ratings | **12** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 21 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 4 MB | 47 MB |
| Requires iOS | 15.4 | **10.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Peter Schorn](https://appshunter.io/developer/291182088) | [WELA.ONLINE CORP.](https://appshunter.io/developer/1621972441) |

## What reviewers say

### MindCalc Arithmetic Trainer

[App page](https://appshunter.io/ios/app/mindcalc-arithmetic-trainer/id306974064)

Sharpen your mental math skills by solving equations where you must select two numbers to match a given result and operator. Earn points for speed, but beware of mistakes that reset your progress. Challenge a friend to a duel of arithmetic prowess.

**Highlights:** Equation solving with number selection, Speed-based scoring, Mistake penalty, High difficulty mode, Two-player competitive mode

**Features:** macOS Compatibility

**In-app purchases:** none


### NobleMinds Montessori

[App page](https://appshunter.io/ios/app/nobleminds-montessori/id1570082999)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is MindCalc Arithmetic Trainer free?

MindCalc Arithmetic Trainer is free to download, with no in-app purchases.

### Is NobleMinds Montessori free?

NobleMinds Montessori is free to download, with no in-app purchases.

### Do MindCalc Arithmetic Trainer or NobleMinds Montessori have ads?

Neither MindCalc Arithmetic Trainer nor NobleMinds Montessori shows ads.

### Which is updated more often, MindCalc Arithmetic Trainer or NobleMinds Montessori?

MindCalc Arithmetic Trainer ships an update every 21 months, and NobleMinds Montessori every 2 months. Most recently, MindCalc Arithmetic Trainer was updated on October 23, 2026 and NobleMinds Montessori on October 18, 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.*