# 원프로 알리미 vs Byeoldosa

The clearest difference is update cadence: 원프로 알리미 at every 2 months against Byeoldosa's every 6 months. 원프로 알리미 also leads on iOS requirement (16.4 vs 18.0). 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.

원프로 알리미 ships an update every 2 months, Byeoldosa every 6 months. The most recent releases landed on October 29, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | 원프로 알리미 | Byeoldosa |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/byeoldosa-arithmetic-practice/id6443646489/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 6 months |
| Monetization | — | Free |
| Size | 55 MB | 10 MB |
| Requires iOS | **16.4** | 18.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [원프로시스템](https://appshunter.io/developer/1477463089) | [Hyekyung Jeong](https://appshunter.io/developer/1634743217) |

## What reviewers say

### 원프로 알리미

[App page](https://appshunter.io/ios/app/id1477463090)

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

**In-app purchases:** none


### Byeoldosa

[App page](https://appshunter.io/ios/app/byeoldosa-arithmetic-practice/id6443646489)

This app offers step-by-step practice for basic arithmetic operations like addition, subtraction, multiplication, and division. It features levels organized by difficulty, from single-digit to three-digit numbers, with a vertical calculation mode that mimics writing sums on paper. Progress is automatically saved and visualized in charts to track speed and accuracy improvements.

**Highlights:** Step-by-step arithmetic practice, Addition, subtraction, multiplication, division, Difficulty levels, Vertical (column) calculation mode, Automatic practice set saving, Progress charts for speed and accuracy

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 원프로 알리미 free?

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

### Is Byeoldosa free?

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

### Do 원프로 알리미 or Byeoldosa have ads?

Neither 원프로 알리미 nor Byeoldosa shows ads.

### Which is updated more often, 원프로 알리미 or Byeoldosa?

원프로 알리미 ships an update every 2 months, and Byeoldosa every 6 months. Most recently, 원프로 알리미 was updated on October 29, 2026 and Byeoldosa on October 22, 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.*