# Num Trainer vs Reimers App

The clearest difference is monetization model: Num Trainer at free against Reimers App's paid. Num Trainer also leads on iOS requirement (18.0 vs 26.0). Reimers App's advantage is update cadence (every 5 days vs every 3 weeks). On price, review sentiment, ads and in-app purchases there is nothing between them.

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

Num Trainer ships an update every 3 weeks, Reimers App every 5 days. The most recent releases landed on October 4, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Num Trainer | Reimers App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/num-trainer/id1531055741/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 5 days** |
| Monetization | **Free** | Paid |
| Size | 2 MB | 2 MB |
| Requires iOS | **18.0** | 26.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Yang Wang](https://appshunter.io/developer/1531055743) | [Francesco Camara Blumetti](https://appshunter.io/developer/1892053041) |

## What reviewers say

### Num Trainer

[App page](https://appshunter.io/ios/app/num-trainer/id1531055741)

This app offers quick, engaging number-based exercises to sharpen your mind. Improve focus, memory, and mental math skills with short training sessions that can be adjusted for difficulty.

**Highlights:** Improve reflection and focus, Enhance attention and memory, Develop mental math skills, Boost logic abilities, Multiple training modes, Adjustable difficulty levels

**In-app purchases:** none


### Reimers App

[App page](https://appshunter.io/ios/app/reimers-app/id6761915841)

This educational tool assists orthopedic surgeons, radiologists, and physiotherapists in quickly and accurately measuring key radiological indices for pediatric hip assessment. It allows for easy import of X-rays, interactive landmark positioning, and automatic calculation and export of results.

**Highlights:** Reimers Migration Index (RMI) calculation, Acetabular Index (AI) calculation, Import X-rays from camera or library, Interactive anatomical landmark positioning, Automatic calculation for both hips, Export results as an image

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

**In-app purchases:** none


## Frequently asked questions

### Is Num Trainer free?

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

### Is Reimers App free?

Reimers App is free to download, with no in-app purchases.

### Do Num Trainer or Reimers App have ads?

Neither Num Trainer nor Reimers App shows ads.

### Which is updated more often, Num Trainer or Reimers App?

Num Trainer ships an update every 3 weeks, and Reimers App every 5 days. Most recently, Num Trainer was updated on October 4, 2026 and Reimers App on October 2, 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.*