# CAD手机看图 vs 容大OTA

The clearest difference is in-app purchases: 容大OTA at none against CAD手机看图's 2. CAD手机看图's advantage is update cadence (weekly vs every 24 months) and device support. On price and iOS requirement there is nothing between them.

Both are free to download. CAD手机看图 sells 2 in-app purchases, starting at $2.99 per 7 days. 容大OTA asks for nothing beyond the download.

CAD手机看图 ships an update weekly, 容大OTA every 24 months. The most recent releases landed on October 16, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | CAD手机看图 | 容大OTA |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/cad-cad/id6461726103/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | **No** |
| Ads | No | — |
| Update frequency | **Weekly** | Every 24 months |
| Monetization | Free | — |
| Size | 49 MB | 2 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | **iPhone, iPod** | — |
| Age rating | 4+ | 4+ |
| Developer | [玉立 梅](https://appshunter.io/developer/1702550163) | [Xiamen Rongta Technology Co.,Ltd](https://appshunter.io/developer/1133035092) |

## What reviewers say

### CAD手机看图

[App page](https://appshunter.io/ios/app/cad-cad/id6461726103)

This engineering tool app offers practical features like altitude, image, and temperature measurement, along with construction check-ins. It provides professional CAD drawing viewing for DWG, DXF, and DWF formats, and includes tools for noise detection, drawing annotation, and work logging.

**Highlights:** CAD drawing viewing (DWG, DXF, DWF), Altitude, image, and temperature measurement, Construction check-ins, Noise level detection, Drawing annotation and modification, Work logging with watermarks, Graphic calculation formulas

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 云盘会员 | $2.99 | per 7 days |
| 云盘会员 | $3.99 | per month |


### 容大OTA

[App page](https://appshunter.io/ios/app/ota/id6502820431)

**In-app purchases:** none


## Frequently asked questions

### Is CAD手机看图 free?

CAD手机看图 is free to download, with in-app purchases available.

### Is 容大OTA free?

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

### Which is updated more often, CAD手机看图 or 容大OTA?

CAD手机看图 ships an update weekly, and 容大OTA every 24 months. Most recently, CAD手机看图 was updated on October 16, 2026 and 容大OTA on October 27, 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.*