# Elevation Survey vs 勾配電卓

The clearest difference is in-app purchases: 勾配電卓 at none against Elevation Survey's 2. Elevation Survey's advantage is update cadence (every 3 months vs every 45 months) and iOS requirement (15.0 vs 17.0). On price and device support there is nothing between them.

Both are free to download. Elevation Survey sells 2 in-app purchases, starting at $6.99 per month. 勾配電卓 asks for nothing beyond the download.

Elevation Survey ships an update every 3 months, 勾配電卓 every 45 months. The most recent releases landed on September 16, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Elevation Survey | 勾配電卓 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 32.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | — |
| Update frequency | **Every 3 months** | Every 45 months |
| Monetization | Freemium | — |
| Size | 75 MB | 1 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Booth](https://appshunter.io/developer/415450674) | [Takahiro Miyashita](https://appshunter.io/developer/1493701742) |

## What reviewers say

### Elevation Survey

[App page](https://appshunter.io/ios/app/elevation-survey/id433368313)

This app simplifies leveling surveys by automatically calculating instrument and ground heights. It allows for instant computation of staff readings for layout work and offers flexible data entry modes. Survey data can be easily exported and shared.

**Highlights:** Automatic HI and GH calculation, Instant staff reading computation for layout, Color-coded input and results, Add notes for projects, Export data as CSV, Standard and Staff data entry modes, In-app tutorial

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $6.99 | per month |
| Premium Yearly | $59.99 | per year |


### 勾配電卓

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Elevation Survey free?

Elevation Survey is free to download, with in-app purchases available.

### Is 勾配電卓 free?

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

### Which is updated more often, Elevation Survey or 勾配電卓?

Elevation Survey ships an update every 3 months, and 勾配電卓 every 45 months. Most recently, Elevation Survey was updated on September 16, 2026 and 勾配電卓 on September 10, 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.*