# 材料计算器 vs ESDPS Survey System

The clearest difference is in-app purchases: 材料计算器 at none against ESDPS Survey System's 2. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. ESDPS Survey System sells 2 in-app purchases, starting at $6.99 per month. 材料计算器 asks for nothing beyond the download.

## The numbers

| Metric | 材料计算器 | ESDPS Survey System |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Size | 2 MB | 17 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [雨雪 雷](https://appshunter.io/developer/1896522689) | [丽君 张](https://appshunter.io/developer/6779038093) |

## What reviewers say

### 材料计算器

[App page](https://appshunter.io/ios/app/and/id6775713912)

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

**In-app purchases:** none


### ESDPS Survey System

[App page](https://appshunter.io/ios/app/esdps-survey-system/id6779094395)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ESDPS Monthly Plan | $6.99 | per month |
| Full Lifetime Access | $79.99 | one-time |


## Frequently asked questions

### Is 材料计算器 free?

材料计算器 is free to download, with no in-app purchases.

### Is ESDPS Survey System free?

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

### Do 材料计算器 or ESDPS Survey System have ads?

Neither 材料计算器 nor ESDPS Survey System shows ads.

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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.*