# NB实验室 vs 疯狂刷题

The clearest difference is ads: NB实验室 at none against 疯狂刷题's shown. NB实验室 also leads on update cadence (fortnightly vs monthly). 疯狂刷题's advantage is review sentiment (90% vs 72%) and iOS requirement (12.0 vs 14.0). On price, rating, ratings volume and in-app purchases there is nothing between them.

Both are free to download. NB实验室 sells 10 in-app purchases, starting at $4.99 per month and 疯狂刷题 sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.8 for NB实验室 against 4.8 for 疯狂刷题. Both are backed by a comparable volume of ratings — 93 and 259 respectively. Written reviews are what separate them: 72% of NB实验室's written reviews are positive against 90% of 疯狂刷题's.

NB实验室 ships an update fortnightly, 疯狂刷题 monthly. The most recent releases landed on November 6, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | NB实验室 | 疯狂刷题 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (93 ratings)](https://appshunter.io/ios/app/nb-dr/id1265400377/reviews) | **[4.8 (259 ratings)](https://appshunter.io/ios/app/id1531067927/reviews)** |
| Number of ratings | 93 | **259** |
| Positive reviews | 72.3% of reviews | **90.2% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Fortnightly** | Monthly |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 82 MB | 58 MB |
| Requires iOS | 14.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [BeiJing LeBu Educational Technology Co., Ltd.](https://appshunter.io/developer/943806906) | [杭州芽儿星科技有限公司](https://appshunter.io/developer/1431606687) |

## What reviewers say

### NB实验室

[App page](https://appshunter.io/ios/app/nb-dr/id1265400377)

This app offers over 2000 synchronized textbook experiments and 1000 DIY experiment kits for interactive learning. It includes simulated experiment testing, AI-powered guidance, and expert-led video lessons to enhance science education and problem-solving skills.

**Highlights:** 2000+ textbook synchronized experiments, 1000+ DIY experiment kits, Interactive experiment simulation, AI intelligent learning companion, Expert-created knowledge videos, Chapter and knowledge point search

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 初中化学连续包月(首月免费) | $4.99 | per month |
| 高中化学连续包年 | $39.99 | per year |
| 初中生物1个月会员 | $4.99 | one-time |
| 高中化学1个月会员 | $4.99 | one-time |
| 初中物理1个月会员 | $4.99 | one-time |
| 高中生物1个月会员 | $4.99 | one-time |
| 高中物理1个月会员 | $4.99 | one-time |
| 259N币 | $39.99 | one-time |
| 518N币 | $69.99 | one-time |
| 初高中套餐6年卡 | $299.99 | one-time |


### 疯狂刷题

[App page](https://appshunter.io/ios/app/id1531067927)

Access a vast collection of practice questions and past exams to prepare for your tests. Encounter diverse question types to broaden your thinking and solidify knowledge. This tool helps you connect learned concepts for confident exam performance.

**Highlights:** Extensive question bank, Real exam questions, Diverse question types, Knowledge consolidation, Exam preparation, Mind expansion

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 6枚勋章 | $1.99 | one-time |
| 20枚勋章 | $3.99 | one-time |
| 50枚勋章 | $6.99 | one-time |
| 普通会员3年 | $14.99 | one-time |
| 高级会员1年 | $14.99 | one-time |
| 110枚勋章 | $14.99 | one-time |
| 100枚勋章 | $14.99 | one-time |
| 普通会员5年 | $17.99 | one-time |
| 高级会员3年 | $19.99 | one-time |
| 高级会员5年 | $22.99 | one-time |


## Frequently asked questions

### Is NB实验室 free?

NB实验室 is free to download, with in-app purchases available.

### Is 疯狂刷题 free?

疯狂刷题 is free to download, with in-app purchases available.

### Which has better reviews, NB实验室 or 疯狂刷题?

疯狂刷题 is rated higher. NB实验室 averages 4.8 out of 5 from 93 ratings, while 疯狂刷题 averages 4.8 from 259 ratings.

### Do NB实验室 or 疯狂刷题 have ads?

疯狂刷题 shows ads; NB实验室 does not.

### Which is updated more often, NB实验室 or 疯狂刷题?

NB实验室 ships an update fortnightly, and 疯狂刷题 monthly. Most recently, NB实验室 was updated on November 6, 2026 and 疯狂刷题 on November 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.*