# 666书友会国际版 vs 单词日积月累

The clearest difference is ads: 单词日积月累 at none against 666书友会国际版's shown. On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. 666书友会国际版 sells 9 one-off in-app purchases and 单词日积月累 sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

666书友会国际版 ships an update every 2 months, 单词日积月累 monthly. The most recent releases landed on October 4, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | 666书友会国际版 | 单词日积月累 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/id6505093598/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 80.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | — | Freemium |
| Size | 71 MB | 69 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Hainan Huidu Technology Co.,Ltd.](https://appshunter.io/developer/1655263750) | [Shenzhen Zhaohuan Network Technology Co., Ltd.](https://appshunter.io/developer/1733427951) |

## What reviewers say

### 666书友会国际版

[App page](https://appshunter.io/ios/app/666/id6478449744)

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1书豆 | $1.49 | one-time |
| 1.5书豆 | $2.19 | one-time |
| 4.5书豆 | $6.49 | one-time |
| 9.5书豆 | $13.90 | one-time |
| 28书豆 | $40.00 | one-time |
| 56书豆 | $80.00 | one-time |
| 95书豆 | $136.99 | one-time |
| 143书豆 | $204.99 | one-time |
| 553书豆 | $790.00 | one-time |


### 单词日积月累

[App page](https://appshunter.io/ios/app/id6505093598)

This app helps users efficiently learn English vocabulary using scientific memory techniques. It offers a vast library of word lists for various exams and levels, with personalized study plans and review mechanisms. Learn anytime, anywhere, even offline, to build lasting vocabulary skills.

**Highlights:** Spaced repetition learning method, Daily vocabulary plans, Personalized new word lists, Personalized familiar word lists, Efficient review system, Offline learning capability, Extensive word bank for various exams

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 连续包月 | $0.99 | per month |
| 连续包年 | $4.99 | per year |
| 一个月会员 | $2.99 | one-time |


## Frequently asked questions

### Is 666书友会国际版 free?

666书友会国际版 is free to download, with in-app purchases available.

### Is 单词日积月累 free?

单词日积月累 is free to download, with in-app purchases available.

### Do 666书友会国际版 or 单词日积月累 have ads?

666书友会国际版 shows ads; 单词日积月累 does not.

### Which is updated more often, 666书友会国际版 or 单词日积月累?

666书友会国际版 ships an update every 2 months, and 单词日积月累 monthly. Most recently, 666书友会国际版 was updated on October 4, 2026 and 单词日积月累 on October 12, 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.*