Byeoldosa vs 찰떡 VOCA
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
찰떡 VOCA
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토익·토플·수능 영단어, 오늘 외울 분량부터 복습까지. 찰떡 VOCA는 시험별 단어장과 퀴즈로 영어 어휘를 익히고, 틀린 단어를 다시 복습하는 영단어 암기 앱이에요. 콩이와 함께 매일의 영어 공부를 이어가세요. • 목표에 맞는 단어장 기초 영어부터 토익, 토플, 수능, 오픽, 공무원, IELTS, GRE까지 준비하는 목표에 맞는 단어장을 고를 수 있어요. • 오늘의 학습과 반복 복습 목표 시험과 날짜를 설정해 오늘 공부할 분량을 확인하세요. 학습한 단어는 기억 정도에 따라 복습 일정을 잡아 주고, 오답 노트에는 틀린 단어가 모여요. • 떠올리고, 직접 풀기 플래시카드와 뜻 맞히기 퀴즈, 철자 입력, 빈칸 채우기, 문장 배열, 짝 맞추기로 같은 단어를 여러 방식으로 익혀요. 단어와 예문으로 영어 표현도 연습할 수 있어요. • 토플 영역별 연습 2026 개정 토플에 맞춘 읽기·듣기·쓰기·말하기 연습을 제공해요. 이메일 작성, 학술 토론, 문장 배열, 따라 말하기 등 과제별로 연습할 수 있어요. • 영상에서 학습으로, 매일의 기록까지 홈에서 오늘의 쇼츠 단어를 눌러 학습으로 이어가세요. 학습 캘린더와 통계에서 공부한 분량과 연속 학습일을 확인할 수 있어요. 문의: 앱 안의 피드백 보내기 또는 https://chaltteok.asyncsite.com 개인정보처리방침: https://chaltteok.asyncsite.com/privacy
Screenshots
Verdict
The clearest difference is update cadence: 찰떡 VOCA at every 4 days against Byeoldosa's every 6 months. 찰떡 VOCA also leads on iOS requirement (15.5 vs 18.0). On price, ads, in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Byeoldosa ships an update every 6 months, 찰떡 VOCA every 4 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.
| Parameter | Byeoldosa | 찰떡 VOCA |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 6 months | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 18.0 | 15.5 — better |
| Further details — not scored | ||
| Size | 10 MB | 74 MB |
| Age rating | 4+ | 4+ |
| Developer | Hyekyung Jeong | boim choi |
In-app purchases
Byeoldosa
No in-app purchases
찰떡 VOCA
No in-app purchases









