# 二建题库 vs 二级建造师2021

The clearest difference is update cadence: 二建题库 at every 3 months against 二级建造师2021's every 8 months. 二建题库 also leads on iOS requirement (9.0 vs 13.1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 二建题库 sells 4 in-app purchases, starting at $0.99 per 3 months and 二级建造师2021 sells 8 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

二建题库 ships an update every 3 months, 二级建造师2021 every 8 months. The most recent releases landed on October 6, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | 二建题库 | 二级建造师2021 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 8 months |
| Size | 8 MB | 54 MB |
| Requires iOS | **9.0** | 13.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [磊 陈](https://appshunter.io/developer/1535417260) | [发中 严](https://appshunter.io/developer/1674687905) |

## What reviewers say

### 二建题库

[App page](https://appshunter.io/ios/app/2026/id1556795750)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 二建题库3天免费试用1元 | $0.99 | per 3 months |
| 月卡 | $8.99 | one-time |
| 年卡 | $9.99 | one-time |
| 三年卡 | $14.99 | one-time |


### 二级建造师2021

[App page](https://appshunter.io/ios/app/2021/id1558984138)

**Features:** macOS Compatibility

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| VIP3个月 | $6.99 | one-time |
| VIP6个月 | $9.99 | one-time |
| VIP12个月 | $14.99 | one-time |
| 价值98元的课程 | $14.99 | one-time |
| 价值198元的课程 | $29.99 | one-time |
| 价值298元的课程 | $46.99 | one-time |
| 价值388元的课程 | $59.99 | one-time |
| 价值488元的课程 | $74.99 | one-time |


## Frequently asked questions

### Is 二建题库 free?

二建题库 is free to download, with in-app purchases available.

### Is 二级建造师2021 free?

二级建造师2021 is free to download, with in-app purchases available.

### Do 二建题库 or 二级建造师2021 have ads?

Neither 二建题库 nor 二级建造师2021 shows ads.

### Which is updated more often, 二建题库 or 二级建造师2021?

二建题库 ships an update every 3 months, and 二级建造师2021 every 8 months. Most recently, 二建题库 was updated on October 6, 2026 and 二级建造师2021 on October 7, 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.*