# Math Zen vs SentenceBox

Math Zen and SentenceBox are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Math Zen sells 6 in-app purchases, starting at $3.99 per 7 days and SentenceBox sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Math Zen | SentenceBox |
| --- | --- | --- |
| 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 3 days | — |
| Monetization | Freemium | — |
| Size | 87 MB | 5 MB |
| Requires iOS | **16.4** | 17.6 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Ivan Terekhin](https://appshunter.io/developer/888645337) | [Kouichi INAFUKU](https://appshunter.io/developer/438372899) |

## What reviewers say

### Math Zen

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

This app provides algorithmically generated math problems for exam preparation, adapting difficulty based on user performance. It covers a wide range of standardized tests and academic math topics with built-in theory and a mistake journal for targeted review. Practice offline without distractions.

**Highlights:** Algorithmically generated problems, Adaptive mastery-based progression, Offline practice, Dedicated exam paths, Mistake journal for review, Built-in theory and examples

**Features:** macOS Compatibility, Family Sharing, Vision Pro support, iPhone Duo 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 |


### SentenceBox

[App page](https://appshunter.io/ios/app/sentencebox/id6794504718)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| フルパッケージ | $5.99 | one-time |


## Frequently asked questions

### Is Math Zen free?

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

### Is SentenceBox free?

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

### Do Math Zen or SentenceBox have ads?

Neither Math Zen nor SentenceBox shows ads.

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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.*