# 666书友会国际版 vs Math Pups

The clearest difference is ads: Math Pups at none against 666书友会国际版's shown. Math Pups also leads on update cadence (fortnightly vs every 2 months). 666书友会国际版's advantage is iOS requirement (13.0 vs 15.6). On price, 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 Math Pups sells 1 one-off in-app purchase. 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, Math Pups fortnightly. The most recent releases landed on October 4, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | 666书友会国际版 | Math Pups |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/math-pups-grade-1-6-math/id6756496045/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | — | Free with in-app purchases |
| Size | 71 MB | 139 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Hainan Huidu Technology Co.,Ltd.](https://appshunter.io/developer/1655263750) | [Knowledge Vortex, LLC](https://appshunter.io/developer/1725396723) |

## 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 |


### Math Pups

[App page](https://appshunter.io/ios/app/math-pups-grade-1-6-math/id6756496045)

This app offers step-by-step math practice for grades 1-6, covering addition, subtraction, multiplication, and division. It motivates children with unlockable puppies and provides parents with detailed progress tracking and insights into learning struggles. A built-in doodle board eliminates the need for paper and pencil.

**Highlights:** Step-by-step math practice (Grades 1-6), Addition, subtraction, multiplication, division, Unlockable puppy rewards, Automated grading and progress tracking, Built-in doodle board, Detailed error analysis for parents

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Math Pups Unlimited | $5.99 | 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 Math Pups free?

Math Pups is free to download, with in-app purchases available.

### Do 666书友会国际版 or Math Pups have ads?

666书友会国际版 shows ads; Math Pups does not.

### Which is updated more often, 666书友会国际版 or Math Pups?

666书友会国际版 ships an update every 2 months, and Math Pups fortnightly. Most recently, 666书友会国际版 was updated on October 4, 2026 and Math Pups on October 19, 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.*