# 质心在线 vs DeepLearning

The clearest difference is in-app purchases: DeepLearning at none against 质心在线's 9. 质心在线's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. 质心在线 sells 9 one-off in-app purchases. DeepLearning asks for nothing beyond the download.

质心在线 ships an update monthly, DeepLearning every 3 weeks. The most recent releases landed on June 7, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | 质心在线 | DeepLearning |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (12 ratings)](https://appshunter.io/ios/app/id1157874179/reviews)** | — |
| Number of ratings | **12** | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Every 3 weeks** |
| Size | 110 MB | 121 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Beijing Center of Mass Educational Technology Co., Ltd.](https://appshunter.io/developer/1129109586) | [杭州铭师智生科技有限公司](https://appshunter.io/developer/1728821302) |

## What reviewers say

### 质心在线

[App page](https://appshunter.io/ios/app/id1157874179)

**Features:** macOS Compatibility

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1个质心币 | $0.99 | one-time |
| 6个质心币 | $0.99 | one-time |
| 12个质心币 | $1.99 | one-time |
| 30个质心币 | $4.99 | one-time |
| 88个质心币 | $12.99 | one-time |
| 108个质心币 | $15.99 | one-time |
| 228个质心币 | $33.99 | one-time |
| 348个质心币 | $54.99 | one-time |
| 518个质心币 | $79.99 | one-time |


### DeepLearning

[App page](https://appshunter.io/ios/app/deeplearning/id6477284622)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 质心在线 free?

质心在线 is free to download, with in-app purchases available.

### Is DeepLearning free?

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

### Do 质心在线 or DeepLearning have ads?

DeepLearning shows ads; 质心在线 does not.

### Which is updated more often, 质心在线 or DeepLearning?

质心在线 ships an update monthly, and DeepLearning every 3 weeks. Most recently, 质心在线 was updated on June 7, 2026 and DeepLearning on September 9, 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.*