# Decimal Rounding vs Mnemo Major System Trainer

The clearest difference is rating: Decimal Rounding at 5.0 against Mnemo Major System Trainer's 4.4. Decimal Rounding also leads on price ($3.99 vs $12.99) and chart position (#191 vs unranked). Mnemo Major System Trainer's advantage is update cadence (every 2 months vs every 12 months) and ratings volume (18 vs 2). On ads, in-app purchases, monetization model and device support there is nothing between them.

Decimal Rounding costs $3.99 and Mnemo Major System Trainer $12.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Decimal Rounding holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Mnemo Major System Trainer has 18 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 100% of Decimal Rounding's written reviews are positive against 88% of Mnemo Major System Trainer's.

Decimal Rounding ships an update every 12 months, Mnemo Major System Trainer every 2 months. The most recent releases landed on October 8, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Decimal Rounding | Mnemo Major System Trainer |
| --- | --- | --- |
| Price | **$3.99** | $12.99 |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/decimal-rounding/id594005395/reviews)** | [4.4 (18 ratings)](https://appshunter.io/ios/app/mnemo-major-system-trainer/id649905769/reviews) |
| Number of ratings | 2 | **18** |
| Positive reviews | **100.0% of reviews** | 88.1% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 2 months** |
| Monetization | Paid | Paid |
| Best chart rank | **#191** | — |
| Size | 1 MB | 54 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | +4 |
| Developer | [Esa Helttula](https://appshunter.io/developer/339440196) | [Gerald Reindl](https://appshunter.io/developer/649905772) |

## What reviewers say

### Decimal Rounding

[App page](https://appshunter.io/ios/app/decimal-rounding/id594005395)

**Currently charting:** #191 Top Paid · Education (US App Store)

This educational app helps users learn and practice rounding decimal numbers. It offers guided step-by-step problem-solving with customizable settings for a stress-free learning experience. Ideal for students and anyone needing to master decimal rounding.

**Highlights:** Learn decimal rounding, Customizable problems, Random problem generation, Step-by-step guidance, Stress-free learning environment, Adjustable interface colors and animations

**Features:** macOS Compatibility

**In-app purchases:** none


### Mnemo Major System Trainer

[App page](https://appshunter.io/ios/app/mnemo-major-system-trainer/id649905769)

Learn and master the Major System, a powerful mnemonic technique for remembering numbers. This app offers an integrated training program with visual aids and statistics to help you create and optimize your personalized number-to-image encoding system.

**Highlights:** Personalized Major System creation, Integrated training program, Reaction time analysis, Number sequence to image generator, Pre-installed Major System (0-99), Customizable terms and images, CSV Import/Export

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Decimal Rounding free?

Decimal Rounding costs $3.99, with no in-app purchases.

### Is Mnemo Major System Trainer free?

Mnemo Major System Trainer costs $12.99, with no in-app purchases.

### Which has better reviews, Decimal Rounding or Mnemo Major System Trainer?

Decimal Rounding is rated higher. Decimal Rounding averages 5.0 out of 5 from 2 ratings, while Mnemo Major System Trainer averages 4.4 from 18 ratings.

### Do Decimal Rounding or Mnemo Major System Trainer have ads?

Neither Decimal Rounding nor Mnemo Major System Trainer shows ads.

### Which is updated more often, Decimal Rounding or Mnemo Major System Trainer?

Decimal Rounding ships an update every 12 months, and Mnemo Major System Trainer every 2 months. Most recently, Decimal Rounding was updated on October 8, 2026 and Mnemo Major System Trainer on October 13, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*