# npiSoroban vs Abacus Trainer

The clearest difference is in-app purchases: npiSoroban at none against Abacus Trainer's 1. npiSoroban also leads on ads (none vs shown) and iOS requirement (5.1.1 vs 15.0). Abacus Trainer's advantage is update cadence (fortnightly vs every 5 months). On price and device support there is nothing between them.

Both are free to download. Abacus Trainer sells 1 one-off in-app purchase. npiSoroban asks for nothing beyond the download.

npiSoroban ships an update every 5 months, Abacus Trainer fortnightly. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | npiSoroban | Abacus Trainer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.4 (5 ratings)](https://appshunter.io/ios/app/npisoroban-iphone-edition/id586798520/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Fortnightly** |
| Monetization | Free | — |
| Size | 95 MB | 31 MB |
| Requires iOS | **5.1.1** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Nonpareil Institute](https://appshunter.io/developer/401989715) | [Doni Winata](https://appshunter.io/developer/6794313295) |

## What reviewers say

### npiSoroban

[App page](https://appshunter.io/ios/app/npisoroban-iphone-edition/id586798520)

Learn to use the Japanese abacus, or soroban, with narrated tutorials on your iPhone or iPad. Master arithmetic with this ancient tool, now digitized for modern learning.

**Highlights:** Digital soroban (abacus), Narrated tutorials, Arithmetic practice, Educational tool, Supports iPhone and iPad

**Features:** macOS Compatibility

**In-app purchases:** none


### Abacus Trainer

[App page](https://appshunter.io/ios/app/abacus-trainer-mental-math/id6794313293)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $4.99 | one-time |


## Frequently asked questions

### Is npiSoroban free?

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

### Is Abacus Trainer free?

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

### Do npiSoroban or Abacus Trainer have ads?

Abacus Trainer shows ads; npiSoroban does not.

### Which is updated more often, npiSoroban or Abacus Trainer?

npiSoroban ships an update every 5 months, and Abacus Trainer fortnightly. Most recently, npiSoroban was updated on October 24, 2026 and Abacus Trainer on October 25, 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.*