Comparison

Byeoldosa vs 두칭

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Byeoldosa

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
Read full description

Byeoldosa is an arithmetic practice app for working through addition, subtraction, multiplication, and division step by step. • Levels are organised by difficulty, so you can start from the basics and move on to more advanced problems at your own pace. • Problems range from single-digit to three-digit numbers, with stages that change depending on whether carrying or borrowing is involved. • In vertical (column) calculation mode, you can follow each column one box at a time, much like writing out the sum on paper. • Every practice set is saved automatically, and your scores and time spent are shown in simple charts, so you can see how your speed and accuracy change as you keep practising. It’s a good fit for students who want to strengthen their arithmetic, for anyone who’d like a bit of mental exercise, or for those moments when you just feel like doing a few number problems. Whenever you feel like practising numbers, just open Byeoldosa.

About

두칭

Engage in fun brain games designed to enhance cognitive abilities and maintain brain health. This training program, based on research from the World Brain Society and official dementia screening tools, offers diverse quizzes and games across seven cognitive areas.

Highlights
  • Cognitive ability enhancement
  • Brain health management
  • Diverse quiz and game formats
  • Based on scientific research
  • Covers 7 cognitive areas
  • Improves memory and concentration
Features
Read full description

두뇌스트레칭, 두칭의 즐거운 두뇌 게임이 두뇌 능력을 높여줍니다. 나이 들어가는 두뇌 건강을 미리미리 관리하세요. 두칭은 넌센스 퀴즈가 아닙니다. 두칭은 다양한 방식과 내용으로 재미있게 퀴즈와 게임을 즐기면서 뇌활동을 증진시키는 훈련 게임입니다. 두칭은 세계두뇌학회, 세계적 두뇌 연구소의 공인된 연구 결과와 한국의 공식 치매 검사 도구인 MMSE 등을 기반으로 개발된 훈련 프로그램으로 뇌의 인지기능을 높이고 유지하는데 도움을 드립니다. 기억력, 집중력, 추론, 연산암산, 지각력, 언어력, 학습력의 7가지 각 인지 영역별로 다양한 퀴즈와 게임 형태의 훈련을 제공합니다.

Screenshots

Byeoldosa4 screens
두칭4 screens

Verdict

The call

The clearest difference is in-app purchases: Byeoldosa at none against 두칭's 4. 두칭's advantage is update cadence (every 11 days vs every 6 months) and iOS requirement (14.0 vs 18.0). On price, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. 두칭 sells 4 in-app purchases, starting at $5.99 per month. Byeoldosa asks for nothing beyond the download.

UpkeepUpdate frequency

Byeoldosa ships an update every 6 months, 두칭 every 11 days. The most recent releases landed on June 4, 2026 and August 1, 2026 respectively.

Scorecard4 real differences · 6 level
Byeoldosa versus 두칭: the parameters behind the verdict, then further details
ParameterByeoldosa두칭
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews—100.0% of reviews
Number of ratings1 — better—
Update frequencyEvery 6 monthsEvery 11 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPadiPhone, iPod
Requires iOS18.014.0 — better
Further details — not scored
Size10 MB5 MB
Age rating4+4+
DeveloperHyekyung JeongActive Senior Lab Co., Ltd.

Customer experience

Byeoldosa

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

두칭

Written reviews8 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Byeoldosa

No in-app purchases

4 purchases

두칭

Subscriptions1
  • 정기구독 훈련$5.991 Month
One-time3
  • 30일 훈련$5.99
  • 90일 훈련$12.99
  • 365일 훈련$39.99

Questions

Is Byeoldosa free?
Byeoldosa is free to download, with no in-app purchases.
Is 두칭 free?
두칭 is free to download, with in-app purchases available.
Do Byeoldosa or 두칭 have ads?
Neither Byeoldosa nor 두칭 shows ads.
Which is updated more often, Byeoldosa or 두칭?
Byeoldosa ships an update every 6 months, and 두칭 every 11 days. Most recently, Byeoldosa was updated on June 4, 2026 and 두칭 on August 1, 2026.

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