# PiSquared vs WriteTex

The clearest difference is price: WriteTex at Free against PiSquared's $1.99. WriteTex also leads on update cadence (every 10 days vs every 23 months). PiSquared's advantage is in-app purchases (none vs 3) and chart position (#183 vs unranked). On ads and device support there is nothing between them.

WriteTex is free to download; PiSquared costs $1.99 up front. WriteTex sells 3 in-app purchases, starting at $3.99 per month. PiSquared asks for nothing beyond the download.

PiSquared ships an update every 23 months, WriteTex every 10 days. The most recent releases landed on October 30, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | PiSquared | WriteTex |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | — | **[3.0 (2 ratings)](https://appshunter.io/ios/app/writetex-math-ocr-and-latex/id6747911928/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 23 months | **Every 10 days** |
| Monetization | — | Freemium |
| Best chart rank | **#183** | — |
| Size | 3 MB | 14 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Hartwig Wiesmann](https://appshunter.io/developer/1658877258) | [星宇 黄](https://appshunter.io/developer/1823348720) |

## What reviewers say

### PiSquared

[App page](https://appshunter.io/ios/app/pisquared/id1615268645)

**Currently charting:** #183 Top Paid · Productivity (US App Store)

**Features:** Apple Watch app

**In-app purchases:** none


### WriteTex

[App page](https://appshunter.io/ios/app/writetex-math-ocr-and-latex/id6747911928)

Instantly convert handwritten math equations into LaTeX, Markdown, or TikZ code. This app uses advanced AI to recognize complex formulas, matrices, and diagrams, integrating seamlessly with desktop editors like VS Code and Obsidian.

**Highlights:** Handwritten math to LaTeX conversion, AI-powered OCR for complex formulas, Markdown and TikZ code output, Desktop sync for VS Code, Obsidian, Word, BYOK (Bring Your Own Key) for data control, High privacy options

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly AI Subscription | $3.99 | per month |
| Yearly AI Subscription | $39.99 | per year |
| Custom API | $1.99 | one-time |


## Frequently asked questions

### Is PiSquared free?

PiSquared costs $1.99, with no in-app purchases.

### Is WriteTex free?

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

### Do PiSquared or WriteTex have ads?

Neither PiSquared nor WriteTex shows ads.

### Which is updated more often, PiSquared or WriteTex?

PiSquared ships an update every 23 months, and WriteTex every 10 days. Most recently, PiSquared was updated on October 30, 2026 and WriteTex on October 24, 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.*