# HiMemo2 vs KnowTree

The clearest difference is in-app purchases: HiMemo2 at none against KnowTree's 1. HiMemo2 also leads on ads (none vs shown) and device support (4 vs 2). KnowTree's advantage is update cadence (every 9 days vs monthly). On price and iOS requirement there is nothing between them.

Both are free to download. KnowTree sells 1 one-off in-app purchase. HiMemo2 asks for nothing beyond the download.

HiMemo2 ships an update monthly, KnowTree every 9 days. The most recent releases landed on September 29, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | HiMemo2 | KnowTree |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Every 9 days** |
| Monetization | Free | — |
| Size | 2 MB | 51 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | **iPhone, iPad, Mac, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hiroyuki Kawai](https://appshunter.io/developer/1286509355) | [Ukon Ryohei](https://appshunter.io/developer/1834526187) |

## What reviewers say

### HiMemo2

[App page](https://appshunter.io/ios/app/himemo2/id1614965391)

Organize information with a simple, hierarchical structure. Easily add, edit, and view data in a tree format, and export it to other apps. Syncs across Apple devices and is accessible on Apple Watch.

**Highlights:** Hierarchical data entry and management, Cross-device sync (iPhone, iPad, Mac), Apple Watch browsing, Enhanced search functionality, Simple and intuitive UI, Plain text and HTML export

**In-app purchases:** none


### KnowTree

[App page](https://appshunter.io/ios/app/knowtree/id6757321205)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| KnowTree Premium | $4.99 | one-time |


## Frequently asked questions

### Is HiMemo2 free?

HiMemo2 is free to download, with no in-app purchases.

### Is KnowTree free?

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

### Do HiMemo2 or KnowTree have ads?

KnowTree shows ads; HiMemo2 does not.

### Which is updated more often, HiMemo2 or KnowTree?

HiMemo2 ships an update monthly, and KnowTree every 9 days. Most recently, HiMemo2 was updated on September 29, 2026 and KnowTree on September 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.*