# Structure vs 密码本

The clearest difference is price: Structure at Free against 密码本's $0.99. Structure also leads on ratings volume (15 vs 2). 密码本's advantage is rating (5.0 vs 3.1) and update cadence (every 3 weeks vs every 2 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Structure is free to download; 密码本 costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

密码本 holds the better App Store score, 5.0 against 3.1. That said, the two scores are not equally well evidenced: Structure has 15 ratings behind it against 2, so its average is the more settled of the two.

Structure ships an update every 2 months, 密码本 every 3 weeks. The most recent releases landed on August 20, 2026 and June 10, 2026 respectively.

## The numbers

| Metric | Structure | 密码本 |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | [3.1 (15 ratings)](https://appshunter.io/ios/app/structure/id570447097/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/id1603051677/reviews)** |
| Number of ratings | **15** | 2 |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | **Free** | Paid |
| Size | 19 MB | 25 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [XRPro, LLC](https://appshunter.io/developer/1642756687) | [杰 林](https://appshunter.io/developer/1602113131) |

## What reviewers say

### Structure

[App page](https://appshunter.io/ios/app/structure/id570447097)

This app is a companion for a 3D scanning accessory, enabling iOS devices to capture the world in three dimensions. It allows users to view live 3D measurements, overlay depth and color data, and stream 3D data to a computer. The app also facilitates firmware updates and battery level checks for the accessory.

**Highlights:** Live 3D distance measurements, Overlay 3D depth and color, Live 3D stream uplink via WiFi, Structure Sensor firmware updates, Structure Sensor battery level check

**In-app purchases:** none


### 密码本

[App page](https://appshunter.io/ios/app/id1603051677)

Securely store and manage all your account usernames and passwords across various platforms. Generate strong, random passwords to enhance your online security. All data is stored locally on your device for maximum privacy.

**Highlights:** Account management, Password generation, Local data storage, Enhanced security, User feedback channel

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Structure free?

Structure is free to download, with no in-app purchases.

### Is 密码本 free?

密码本 costs $0.99, with no in-app purchases.

### Which has better reviews, Structure or 密码本?

密码本 is rated higher. Structure averages 3.1 out of 5 from 15 ratings, while 密码本 averages 5.0 from 2 ratings.

### Do Structure or 密码本 have ads?

Neither Structure nor 密码本 shows ads.

### Which is updated more often, Structure or 密码本?

Structure ships an update every 2 months, and 密码本 every 3 weeks. Most recently, Structure was updated on August 20, 2026 and 密码本 on June 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.*