# VisualGrammar vs Math Automata

The clearest difference is price: Math Automata at Free against VisualGrammar's $3.99. Math Automata also leads on update cadence (every 4 days vs every 10 days) and iOS requirement (13.0 vs 17.6). VisualGrammar's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support there is nothing between them.

Math Automata is free to download; VisualGrammar costs $3.99 up front. Math Automata sells 1 one-off in-app purchase. VisualGrammar asks for nothing beyond the download.

VisualGrammar ships an update every 10 days, Math Automata every 4 days. The most recent releases landed on November 7, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | VisualGrammar | Math Automata |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[3.5 (2 ratings)](https://appshunter.io/ios/app/visualgrammarsentence-diagram/id6470222379/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 10 days | **Every 4 days** |
| Monetization | Paid | — |
| Size | 16 MB | 123 MB |
| Requires iOS | 17.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Simin Dai](https://appshunter.io/developer/1231564112) | [seoro lee](https://appshunter.io/developer/1868875657) |

## What reviewers say

### VisualGrammar

[App page](https://appshunter.io/ios/app/visualgrammarsentence-diagram/id6470222379)

This app uses an AI-powered model inspired by Reed–Kellogg diagrams to automatically generate visual representations of sentence structure. It works offline, making grammar analysis accessible and engaging for students and language enthusiasts.

**Highlights:** Automatic sentence diagram generation, Offline functionality, Lightweight AI model, Visualizes grammar, Privacy-first design

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

**In-app purchases:** none


### Math Automata

[App page](https://appshunter.io/ios/app/math-automata/id6758681941)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 10 hints | $0.99 | one-time |


## Frequently asked questions

### Is VisualGrammar free?

VisualGrammar costs $3.99, with no in-app purchases.

### Is Math Automata free?

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

### Do VisualGrammar or Math Automata have ads?

Math Automata shows ads; VisualGrammar does not.

### Which is updated more often, VisualGrammar or Math Automata?

VisualGrammar ships an update every 10 days, and Math Automata every 4 days. Most recently, VisualGrammar was updated on November 7, 2026 and Math Automata on November 9, 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.*