Slope Calc vs 勾配電卓
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Slope Calc
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“Why is the size of Calculator each buttons same? “ “How order is the priority of Calculator button? “ “What type Calculator is designed ,According to this priority? “ From those point,I redesign Calculator. Calculator is for Calculation.Not for inputting number. Consequently, the most important button is NOT number buttons. The most important button is 4 arithmetical operation buttons. I design those 4 arithmetical operation button is bigger than 10 number buttons. I put those 4 buttons around number buttons(relative position). And if you incline your iPhone to the direction of top and bottom right and left , you can input 4 arithmetical operation. ・Future function additional plan Equal sign input by the gesture
勾配電卓
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建築の設計等における勾配計算を助けるシンプルで使いやすいアプリ。 水平距離・垂直距離または勾配を条件として入力するだけで、瞬時に計算。 勾配は%と1/xに対応。
Screenshots
Verdict
The clearest difference is price: 勾配電卓 at Free against Slope Calc's $0.99. Slope Calc's advantage is update cadence (every 21 months vs every 45 months) and iOS requirement (7.0 vs 17.0). On in-app purchases 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
勾配電卓 is free to download; Slope Calc costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Slope Calc ships an update every 21 months, 勾配電卓 every 45 months. The most recent releases landed on November 10, 2026 and November 7, 2026 respectively.
| Parameter | Slope Calc | 勾配電卓 |
|---|---|---|
| Price | $0.99 | Free — better |
| Update frequency | Every 21 months — better | Every 45 months |
| Ads | No | — |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 7.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 1 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Yosuke Kurashima | Takahiro Miyashita |
In-app purchases
Slope Calc
No in-app purchases
勾配電卓
No in-app purchases
