# Undy vs Simple Mind Tree

The clearest difference is in-app purchases: Simple Mind Tree at none against Undy's 1. Simple Mind Tree also leads on device support (3 vs 1) and iOS requirement (15.1 vs 18.1). On price, update cadence and ads there is nothing between them.

Both are free to download. Undy sells 1 in-app purchase, starting at $0.99 per month. Simple Mind Tree asks for nothing beyond the download.

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 9, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Undy | Simple Mind Tree |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/undy-read-and-write-easily/id6457516127/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | Weekly |
| Monetization | Freemium | — |
| Size | 43 MB | 30 MB |
| Requires iOS | 18.1 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Benjamin Moore](https://appshunter.io/developer/1700973051) | [Cheonsoo Park](https://appshunter.io/developer/1546728209) |

## What reviewers say

### Undy

[App page](https://appshunter.io/ios/app/undy-read-and-write-easily/id6457516127)

This app simplifies complex texts, making them easy to understand. It helps you read and comprehend various documents, from medical notes to legal documents. Additionally, it offers assistance for clear English writing.

**Highlights:** Simplifies complex texts, Makes documents easy to read, Assists with English writing, Supports various document types, Free to use

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $0.99 | per month |


### Simple Mind Tree

[App page](https://appshunter.io/ios/app/simple-mind-tree/id6759855090)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Undy free?

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

### Is Simple Mind Tree free?

Simple Mind Tree is free to download, with no in-app purchases.

### Do Undy or Simple Mind Tree have ads?

Neither Undy nor Simple Mind Tree shows ads.

### Which is updated more often, Undy or Simple Mind Tree?

Undy ships an update weekly, and Simple Mind Tree weekly. Most recently, Undy was updated on October 9, 2026 and Simple Mind Tree on October 5, 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.*