# Math Zen vs 投影与视图3D教具

The clearest difference is device support: 投影与视图3D教具 at 6 against Math Zen's 2. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Math Zen sells 6 in-app purchases, starting at $3.99 per 7 days and 投影与视图3D教具 sells 4 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Math Zen ships an update every 2 days, 投影与视图3D教具 every 4 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Math Zen | 投影与视图3D教具 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (6 ratings)](https://appshunter.io/ios/app/math-zen-exam-prep-and-drill/id6758208511/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 4 days |
| Monetization | Free with in-app purchases | — |
| Size | 82 MB | 8 MB |
| Requires iOS | 16.4 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Mac, Apple Watch, Vision Pro** |
| Age rating | +4 | 4+ |
| Developer | [Ivan Terekhin](https://appshunter.io/developer/888645337) | [天添 叶](https://appshunter.io/developer/6799125945) |

## What reviewers say

### Math Zen

[App page](https://appshunter.io/ios/app/math-zen-exam-prep-and-drill/id6758208511)

This app provides adaptive math practice for standardized exams and university-level courses. It generates unique problems, tracks mastery, and offers offline access for focused learning. Review mistakes and visualize concepts to build long-term retention.

**Highlights:** Algorithmically generated problems, Adaptive mastery-based progression, Mistake journal for review, Visual problem explanations, Offline access, Exam-specific problem sets

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Math Zen Premium — Weekly | $3.99 | per 7 days |
| Math Zen Premium — Monthly | $6.99 | per month |
| Math Zen Premium — Annual | $29.99 | per year |
| Math Zen Premium: Lifetime | $24.99 | one-time |
| Math Zen Premium: Lifetime | $29.99 | one-time |
| Math Zen Premium — Lifetime | $39.99 | one-time |


### 投影与视图3D教具

[App page](https://appshunter.io/ios/app/3d/id6804217452)

**Features:** Apple Watch app

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Membership | $0.99 | per month |
| Weekly Membership | $0.99 | per 7 days |
| Yearly Membership | $2.99 | per year |
| Lifetime Membership | $3.99 | one-time |


## Frequently asked questions

### Is Math Zen free?

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

### Is 投影与视图3D教具 free?

投影与视图3D教具 is free to download, with in-app purchases available.

### Do Math Zen or 投影与视图3D教具 have ads?

Neither Math Zen nor 投影与视图3D教具 shows ads.

### Which is updated more often, Math Zen or 投影与视图3D教具?

Math Zen ships an update every 2 days, and 投影与视图3D教具 every 4 days. Most recently, Math Zen was updated on October 24, 2026 and 投影与视图3D教具 on October 25, 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.*