M21 vs 数独杀
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
M21
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【M21-3X特工】是密室逃脱升级版，一款学霸专属的游戏！！让你的脑力与体力High起来！！ 也是一款城市实景探索解谜游戏，玩法新颖。玩家以特工身份通过APP接收任务 ，穿梭于商场或公园等搜寻通关线索，完成各种难度的特工解谜任务，在更广阔的空间感受烧脑体验！！ 我们不一样，不做传统、不玩机关、没有惊吓与夸张的装备，手机是你的通关工具，需要你在杂乱的环境中挑战你的观察力、逻辑力、协作力！！ 任务模式：单人任务、双人任务、内奸任务、团建任务等！ 游戏人数不限，可多人同时进行！
数独杀
Solve murder cases using Sudoku logic and explore a mysterious castle. Unlock abilities and defeat puzzle bosses with your intellect. Experience a unique blend of puzzle-solving and mystery.
- Sudoku logic for crime solving
- Castle exploration with fog
- Unlockable abilities
- 100% exploration goals
- Defeat puzzle bosses
- Intellect-based challenges
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在像素场景中寻找线索，用逻辑推理还原案发现场。 《数独杀》将熟悉的行列推理与场景解谜结合：阅读案件线索，判断人物之间的位置关系，把嫌疑人与受害者放到正确的格子里，再提交你的推理结果。 【逐条线索，推理破案】 观察房间、家具和人物关系，标记不可能的位置，一步步缩小范围。 【不同规模的现场】 选择不同大小的逻辑网格，面对布局和线索各异的案件。 【探索更多谜题】 除了案件关卡，还可以进入城堡探索，挑战不同类型的逻辑谜题。 准备好了吗？走进现场，让每一条线索都有意义。
Screenshots
Verdict
The clearest difference is in-app purchases: M21 at none against 数独杀's 1. M21 also leads on ads (none vs shown) and iOS requirement (12.0 vs 15.0). 数独杀's advantage is update cadence (every 3 days vs every 5 weeks). On price 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. 数独杀 sells 1 one-off in-app purchase. M21 asks for nothing beyond the download.
M21 ships an update every 5 weeks, 数独杀 every 3 days. The most recent releases landed on October 26, 2026 and October 30, 2026 respectively.
| Parameter | M21 | 数独杀 |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (6 ratings) — better |
| Positive reviews | — | 56.3% of reviews |
| Number of ratings | — | 6 — better |
| Update frequency | Every 5 weeks | Every 3 days — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 65 MB | 120 MB |
| Age rating | 9+ | 4+ |
| Developer | 广州惟为网络科技有限公司 | Chengdu Yztp Technology Co., Ltd |
In-app purchases
M21
No in-app purchases
数独杀
- 数独杀VIP$0.99
