Sum Loop vs Mathdoku
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Sum Loop
A challenging puzzle game where players place blocks into overlapping loops to match displayed sums. Offers multiple solutions for each puzzle, providing replayability. Designed for quick, engaging gameplay.
- Match sums in overlapping loops
- Place blocks to solve puzzles
- Multiple solutions per puzzle
- Challenging gameplay
- Intuitive block placement
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Number will be added to all loops where the loops are overlapped. Put the blocks in the loops and match all the sums displayed above. There is more than 1 answer.
Mathdoku
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Mathdoku (known as KenKen, Calcudoku) is an arithmetic puzzle that combines elements of sudoku and math. The rules of Mathdoku are complex. If you are new to this puzzle, you are suggested to read the wiki https://en.wikipedia.org/wiki/KenKen for details. We have different levels of Mathdoku for you to play. We have: - An unlimited number of Mathdoku. - Different level of Mathdoku - Easy Mathdoku puzzle - Normal Mathdoku puzzle - Hard Mathdoku puzzle (very difficult KenKen) - Extremely Hard Mathdoku (very difficult KenKen) - A daily new extremely hard challenging Mathdoku (Daily KenKen) This is the ultimate Mathdoku game for IOS. Play Mathdoku now! As in Sudoku, the goal of each puzzle is to fill a grid with digits so that no digit appears more than once in any row or any column (a Latin square). Grids size is 9×9. Additionally, KenKen grids are divided into heavily outlined groups of cells –– often called “cages” –– and the numbers in the cells of each cage must produce a certain “target” number when combined using a specified mathematical operation (either addition, subtraction, multiplication or division). For example, a linear three-cell cage specifying addition and a target number of 6 in a 4×4 puzzle must be satisfied with the digits 1, 2, and 3. Digits may be repeated within a cage, as long as they are not in the same row or column. No operation is relevant for a single-cell cage: placing the "target" in the cell is the only possibility (thus being a "free space"). The target number and operation appear in the upper left-hand corner of the cage. The objective is to fill the grid in with the digits 1 through 9 such that: Each row contains exactly one of each digit Each column contains exactly one of each digit Each bold-outlined group of cells is a cage containing digits which achieve the specified result using the specified mathematical operation: addition (+), subtraction (−), multiplication (×), and division (÷). Some of the techniques from Sudoku and Killer Sudoku can be used here, but much of the process involves the listing of all the possible options and eliminating the options one by one as other information requires.
Screenshots
Verdict
The clearest difference is in-app purchases: Mathdoku at none against Sum Loop's 1. Mathdoku also leads on update cadence (every 4 days vs every 4 months). Sum Loop's advantage is iOS requirement (14.0 vs 17.0). 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
Both are free to download. Sum Loop sells 1 one-off in-app purchase. Mathdoku asks for nothing beyond the download.
Sum Loop ships an update every 4 months, Mathdoku every 4 days. The most recent releases landed on June 1, 2026 and May 19, 2026 respectively.
| Parameter | Sum Loop | Mathdoku |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 4 months | Every 4 days — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 14.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 9 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Goro Sato | Ting Yeung |
In-app purchases
Sum Loop
- Remove Ads$0.99
Mathdoku
No in-app purchases









