Solid Sudoku vs Sudoku Calm
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Solid Sudoku
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A simple Sudoku game. I built it for myself and my family to enjoy together. No excessive ads during gameplay—just a quiet, comfortable space to focus on the puzzle. To support healthy screen habits for kids, the app includes Parent Settings. When you first install the app, a parent can set: - How many rounds can be played - A waiting time between rounds This helps children naturally build the habit of self-control. Your play records are also saved, so you can look back after finishing a game and keep the fun going. [Why Sudoku is great] - Improves logical thinking - Strengthens concentration - Develops problem-solving skills - Trains memory - Enhances number sense Short sessions, deep focus. Enjoy a healthy brain game that the whole family can play together.
Sudoku Calm
This app offers a minimalist Sudoku experience focused on quiet contemplation and daily challenges. Enjoy five difficulty levels, a daily puzzle with streak tracking, and a ghost race mode against past players. It provides a clean interface with helpful tools like number highlighting and smartメモ, all without ads or logins.
- Five difficulty levels
- Daily puzzle with streak tracking
- Ghost race mode
- Number highlighting
- Smart memo
- Undo and hint functions
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Sudoku Calm은 화려한 연출을 덜어내고, 숫자와 마주하는 시간을 담았습니다. 조용한 팔레트, 단정한 여백, 매일 돌아오는 한 판. 5분이면 충분한 하루의 리셋. - 다섯 가지 난이도 입문 · 초급 · 중급 · 마스터 · 대결 처음이라면 입문부터, 도전이 필요하다면 마스터까지. - 오늘의 퍼즐 매일 새로 열리는 하루 한 판. 완료한 날은 달력에 남습니다. - 연속 기록과 달력 플레이한 날들이 점으로 이어져 리듬이 됩니다. 한눈에 보는 나만의 루틴. - 대결 모드 지난 플레이어들과의 시간을 겨루는 고스트 레이스. 친구와의 재미있는 대결. 짧은 집중, 선명한 성취. - 깔끔한 플레이 경험 같은 숫자 하이라이트 · 스마트 메모 · 실행취소 · 힌트 3회 breathe, think, solve.
Screenshots
Verdict
The clearest difference is update cadence: Solid Sudoku at every 3 days against Sudoku Calm's every 9 days. On ads, in-app purchases, device support and iOS requirement 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
Solid Sudoku ships an update every 3 days, Sudoku Calm every 9 days. The most recent releases landed on October 2, 2026 and October 9, 2026 respectively.
| Parameter | Solid Sudoku | Sudoku Calm |
|---|---|---|
| Price | Free — better | — |
| Rating | — | 5.0 (2 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 2 — better |
| Update frequency | Every 3 days — better | Every 9 days |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 14.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 28 MB | 27 MB |
| Age rating | 4+ | 4+ |
| Developer | Sooyeol Jeong | HYEKYUNG MOON |
In-app purchases
Solid Sudoku
No in-app purchases
Sudoku Calm
No in-app purchases









