# Slope Calc vs 勾配電卓

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.

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.

## The numbers

| Metric | Slope Calc | 勾配電卓 |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | — |
| Update frequency | **Every 21 months** | Every 45 months |
| Size | 1 MB | 1 MB |
| Requires iOS | **7.0** | 17.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Yosuke Kurashima](https://appshunter.io/developer/806702002) | [Takahiro Miyashita](https://appshunter.io/developer/1493701742) |

## What reviewers say

### Slope Calc

[App page](https://appshunter.io/ios/app/slope-calc/id806701999)

**Features:** macOS Compatibility

**In-app purchases:** none


### 勾配電卓

[App page](https://appshunter.io/ios/app/1x/id1493701743)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Slope Calc free?

Slope Calc costs $0.99, with no in-app purchases.

### Is 勾配電卓 free?

勾配電卓 is free to download, with no in-app purchases.

### Which is updated more often, Slope Calc or 勾配電卓?

Slope Calc ships an update every 21 months, and 勾配電卓 every 45 months. Most recently, Slope Calc was updated on November 10, 2026 and 勾配電卓 on November 7, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*