# 导学号 vs 投影与视图3D教具

The clearest difference is in-app purchases: 导学号 at none against 投影与视图3D教具's 4. 投影与视图3D教具's advantage is update cadence (every 4 days vs every 2 months) and device support (6 vs 3). On price, ads and iOS requirement there is nothing between them.

Both are free to download. 投影与视图3D教具 sells 4 in-app purchases, starting at $0.99 per month. 导学号 asks for nothing beyond the download.

导学号 ships an update every 2 months, 投影与视图3D教具 every 4 days. The most recent releases landed on October 4, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | 导学号 | 投影与视图3D教具 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 4 days** |
| Size | 16 MB | 8 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac, Apple Watch, Vision Pro** |
| Age rating | 4+ | 4+ |
| Developer | [Xi 'an Daoxue Education Technology Co., Ltd.](https://appshunter.io/developer/840087888) | [天添 叶](https://appshunter.io/developer/6799125945) |

## What reviewers say

### 导学号

[App page](https://appshunter.io/ios/app/id998106246)

**Features:** macOS Compatibility

**In-app purchases:** none


### 投影与视图3D教具

[App page](https://appshunter.io/ios/app/3d/id6804217452)

**Features:** Apple Watch app

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Membership | $0.99 | per month |
| Weekly Membership | $0.99 | per 7 days |
| Yearly Membership | $2.99 | per year |
| Lifetime Membership | $3.99 | one-time |


## Frequently asked questions

### Is 导学号 free?

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

### Is 投影与视图3D教具 free?

投影与视图3D教具 is free to download, with in-app purchases available.

### Do 导学号 or 投影与视图3D教具 have ads?

Neither 导学号 nor 投影与视图3D教具 shows ads.

### Which is updated more often, 导学号 or 投影与视图3D教具?

导学号 ships an update every 2 months, and 投影与视图3D教具 every 4 days. Most recently, 导学号 was updated on October 4, 2026 and 投影与视图3D教具 on October 25, 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.*