Rhomb transform vs 算术速答
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Rhomb transform
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There are many ways to calculate the area of a diamond, which is often a vexing problem. Rhomb transform is an app that can use different methods to calculate the area of a diamond. You only need to enter known values to calculate it, including height, diagonal length, inscribed circle, etc.!
算术速答
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算术速答闯关——轻量益智口算训练小游戏! 【核心玩法】 随机生成10至20以内加减乘除算术题目,限时答对指定数量即可通关晋级。答对即消,答错无惩罚,可反复修正。20个关卡难度平滑递增,从简单加减到混合运算,全面覆盖基础算术体系。 【趣味挑战】 数字华容道:滑动数字方块,训练逻辑思维。 速算配对:算式匹配答案,锻炼快速反应。 【产品特色】 自由练习模式,无限刷题无压力 每日挑战,记录个人最佳成绩 成就系统,激励持续训练 详细统计,追踪训练进步 极简界面,无广告无内购 纯单机离线,随时随地开局 适合儿童口算启蒙、学生巩固基础、成人健脑休闲。越玩越快,越算越准!
Screenshots
Verdict
Rhomb transform and 算术速答 are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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.
| Parameter | Rhomb transform | 算术速答 |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 10 days | — |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 14.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 32 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | MUMTAZ FEEDS & ALLIED INDUSTRIES PRIVATE LIMITED | April Pittman |
In-app purchases
Rhomb transform
No in-app purchases
算术速答
No in-app purchases









