# Num Trainer vs 嗯背单词

The clearest difference is in-app purchases: Num Trainer at none against 嗯背单词's 5. Num Trainer also leads on review sentiment (100% vs 86%) and rating (5.0 vs 4.8). 嗯背单词's advantage is ratings volume (87 vs 2) and update cadence (every 8 days vs every 3 weeks). On price, ads and device support there is nothing between them.

Both are free to download. 嗯背单词 sells 5 in-app purchases, starting at $0.99 per month. Num Trainer asks for nothing beyond the download.

Num Trainer holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: 嗯背单词 has 87 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 100% of Num Trainer's written reviews are positive against 86% of 嗯背单词's.

Num Trainer ships an update every 3 weeks, 嗯背单词 every 8 days. The most recent releases landed on October 4, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Num Trainer | 嗯背单词 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/num-trainer/id1531055741/reviews)** | [4.8 (87 ratings)](https://appshunter.io/ios/app/id6450109182/reviews) |
| Number of ratings | 2 | **87** |
| Positive reviews | **100.0% of reviews** | 85.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 8 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 2 MB | 36 MB |
| Requires iOS | 18.0 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Yang Wang](https://appshunter.io/developer/1531055743) | [斌斌 沈](https://appshunter.io/developer/1509733863) |

## What reviewers say

### Num Trainer

[App page](https://appshunter.io/ios/app/num-trainer/id1531055741)

This app offers quick, engaging number-based exercises to sharpen your mind. Improve focus, memory, and mental math skills with short training sessions that can be adjusted for difficulty.

**Highlights:** Improve reflection and focus, Enhance attention and memory, Develop mental math skills, Boost logic abilities, Multiple training modes, Adjustable difficulty levels

**In-app purchases:** none


### 嗯背单词

[App page](https://appshunter.io/ios/app/id6450109182)

This app uses a unique state machine algorithm to dramatically increase vocabulary learning efficiency. It offers a minimalist design, single-handed operation, and flexible review options without forced repetition. Users can also add notes, use an integrated dictionary, and import custom word lists.

**Highlights:** State machine algorithm for efficient memorization, Minimalist SwiftUI native design, Single-handed operation, Flexible review without forced repetition, Integrated online dictionary with images and encyclopedic content, Customizable word lists and notes, Word radio feature

**Features:** Family Sharing

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月度会员 | $0.99 | per month |
| 年度会员 | $9.99 | per year |
| 终身会员 | Free | one-time |
| 终身会员 | $4.99 | one-time |
| 终身会员 | $6.99 | one-time |


## Frequently asked questions

### Is Num Trainer free?

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

### Is 嗯背单词 free?

嗯背单词 is free to download, with in-app purchases available.

### Which has better reviews, Num Trainer or 嗯背单词?

Num Trainer is rated higher. Num Trainer averages 5.0 out of 5 from 2 ratings, while 嗯背单词 averages 4.8 from 87 ratings.

### Do Num Trainer or 嗯背单词 have ads?

Neither Num Trainer nor 嗯背单词 shows ads.

### Which is updated more often, Num Trainer or 嗯背单词?

Num Trainer ships an update every 3 weeks, and 嗯背单词 every 8 days. Most recently, Num Trainer was updated on October 4, 2026 and 嗯背单词 on October 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.*