# 理控+ vs CAD快速看图制图

The clearest difference is in-app purchases: 理控+ at none against CAD快速看图制图's 6. 理控+ also leads on ads (none vs shown) and update cadence (monthly vs every 7 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. CAD快速看图制图 sells 6 one-off in-app purchases. 理控+ asks for nothing beyond the download.

理控+ ships an update monthly, CAD快速看图制图 every 7 months. The most recent releases landed on September 8, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | 理控+ | CAD快速看图制图 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Monthly** | Every 7 months |
| Size | 147 MB | 34 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [南京理工科技系统有限公司](https://appshunter.io/developer/972965020) | [Fingertip Jusheng (Taiyuan) Network Technology Co. LTD](https://appshunter.io/developer/1687910061) |

## What reviewers say

### 理控+

[App page](https://appshunter.io/ios/app/plus/id6475380568)

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

**In-app purchases:** none


### CAD快速看图制图

[App page](https://appshunter.io/ios/app/cad-pdf/id6478941089)

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 6元特惠体验套餐 | $0.99 | one-time |
| 12元超值优享套餐 | $1.99 | one-time |
| 18元特惠体验套餐 | $2.99 | one-time |
| 28元经济加量套餐 | $3.99 | one-time |
| 订购28元特惠套餐，畅想更体验 | $3.99 | one-time |
| 38元经济加量套餐 | $4.99 | one-time |


## Frequently asked questions

### Is 理控+ free?

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

### Is CAD快速看图制图 free?

CAD快速看图制图 is free to download, with in-app purchases available.

### Do 理控+ or CAD快速看图制图 have ads?

CAD快速看图制图 shows ads; 理控+ does not.

### Which is updated more often, 理控+ or CAD快速看图制图?

理控+ ships an update monthly, and CAD快速看图制图 every 7 months. Most recently, 理控+ was updated on September 8, 2026 and CAD快速看图制图 on September 21, 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.*