# 666书友会国际版 vs Schulte Grid

The clearest difference is in-app purchases: Schulte Grid at none against 666书友会国际版's 9. Schulte Grid also leads on ads (none vs shown). 666书友会国际版's advantage is iOS requirement (13.0 vs 16.0). On price, update cadence 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. Schulte Grid asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 8, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | 666书友会国际版 | Schulte Grid |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/schulte-grid-printable/id6547865783/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | — | Free |
| Size | 71 MB | 11 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac** |
| Age rating | 17+ | 4+ |
| Developer | [Hainan Huidu Technology Co.,Ltd.](https://appshunter.io/developer/1655263750) | [培克 罗](https://appshunter.io/developer/1516557687) |

## 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 |


### Schulte Grid

[App page](https://appshunter.io/ios/app/schulte-grid-printable/id6547865783)

Engage in daily attention exercises with printable A4 grids. Find numbers sequentially, track your times, and monitor progress across various grid sizes. Sync data via iCloud for seamless practice across devices.

**Highlights:** Printable A4 Schulte tables, Multiple grid sizes (3x3 to 6x6), Timed practice sessions, Progress tracking and personal bests, Daily goal setting and practice streaks, iCloud sync, Light, dark, and textured themes

**Features:** Vision Pro support

**In-app purchases:** none


## 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 Schulte Grid free?

Schulte Grid is free to download, with no in-app purchases.

### Do 666书友会国际版 or Schulte Grid have ads?

666书友会国际版 shows ads; Schulte Grid does not.

### Which is updated more often, 666书友会国际版 or Schulte Grid?

666书友会国际版 ships an update every 2 months, and Schulte Grid every 2 months. Most recently, 666书友会国际版 was updated on November 8, 2026 and Schulte Grid on October 30, 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.*