# MXTNote vs Tethra.ai

The clearest difference is in-app purchases: MXTNote at none against Tethra.ai's 7. MXTNote also leads on iOS requirement (13.0 vs 15.5). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Tethra.ai sells 7 in-app purchases, starting at $4.99 per 7 days. MXTNote asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on September 24, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | MXTNote | Tethra.ai |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/mxtnote/id1518415738/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Monetization | Free | — |
| Size | 131 MB | 48 MB |
| Requires iOS | **13.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Tao Ma](https://appshunter.io/developer/1518415737) | [Gitspark Technologies, LLC](https://appshunter.io/developer/1669355905) |

## What reviewers say

### MXTNote

[App page](https://appshunter.io/ios/app/mxtnote/id1518415738)

This app helps organize research and study materials by linking PDFs, notes, and web pages. It offers PDF reading, text and handwriting notes, and an arXiv explorer for academic papers. Create a knowledge graph to visualize connections between your research fragments.

**Highlights:** PDF reader with link navigation, Text and handwriting note-taking, Link notes and PDFs to create a knowledge graph, ARXIV explorer for academic papers, Web page import (HTML to PDF), OCR and image search for PDFs, Sync across devices

**Features:** macOS Compatibility

**In-app purchases:** none


### Tethra.ai

[App page](https://appshunter.io/ios/app/tethraai/id6759218397)

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Weekly | $4.99 | per 7 days |
| Tethra | $14.99 | per month |
| Tethra | $99.99 | per year |
| 10,000 Credits | $0.99 | one-time |
| 50,000 Credits | $4.99 | one-time |
| 100,000 Credits | $9.99 | one-time |
| 250,000 Credits | $24.99 | one-time |


## Frequently asked questions

### Is MXTNote free?

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

### Is Tethra.ai free?

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

### Do MXTNote or Tethra.ai have ads?

Neither MXTNote nor Tethra.ai shows ads.

### Which is updated more often, MXTNote or Tethra.ai?

MXTNote ships an update every 2 weeks, and Tethra.ai every 2 weeks. Most recently, MXTNote was updated on September 24, 2026 and Tethra.ai on October 14, 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.*