Comparison

Solid Sudoku vs Sudoku Calm

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

Head to head
About

Solid Sudoku

Features
Read full description

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.

About

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.

Highlights
  • Five difficulty levels
  • Daily puzzle with streak tracking
  • Ghost race mode
  • Number highlighting
  • Smart memo
  • Undo and hint functions
Features
Read full description

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

Solid Sudoku4 screens
Sudoku Calm4 screens

Verdict

The call

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

UpkeepUpdate frequency

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.

Scorecard1 real difference · 9 level
Solid Sudoku versus Sudoku Calm: the parameters behind the verdict, then further details
ParameterSolid SudokuSudoku Calm
PriceFree — better—
Rating—5.0 (2 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—2 — better
Update frequencyEvery 3 days — betterEvery 9 days
AdsYesYes
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS14.0 — better15.1
Further details — not scored
Size28 MB27 MB
Age rating4+4+
DeveloperSooyeol JeongHYEKYUNG MOON

In-app purchases

None

Solid Sudoku

No in-app purchases

None

Sudoku Calm

No in-app purchases

Questions

Is Solid Sudoku free?
Solid Sudoku is free to download, with no in-app purchases.
Is Sudoku Calm free?
Pricing for Sudoku Calm is not currently listed on the App Store.
Do Solid Sudoku or Sudoku Calm have ads?
Both Solid Sudoku and Sudoku Calm show ads.
Which is updated more often, Solid Sudoku or Sudoku Calm?
Solid Sudoku ships an update every 3 days, and Sudoku Calm every 9 days. Most recently, Solid Sudoku was updated on October 2, 2026 and Sudoku Calm on October 9, 2026.

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