# Structree vs Nubble Notes

The clearest difference is in-app purchases: Nubble Notes at none against Structree's 2. Nubble Notes also leads on ads (none vs shown). Structree's advantage is iOS requirement (13.0 vs 16.0). On price, update cadence and device support there is nothing between them.

Both are free to download. Structree sells 2 one-off in-app purchases. Nubble Notes asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 5 days. The most recent releases landed on October 8, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Structree | Nubble Notes |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/nubble-notes-mind-map-and-ideas/id6797114391/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 5 days | Every 5 days |
| Monetization | — | Free |
| Size | 28 MB | 5 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Yuichi Sato](https://appshunter.io/developer/1894470170) | [ADAM JIANG LAI](https://appshunter.io/developer/6797114393) |

## What reviewers say

### Structree

[App page](https://appshunter.io/ios/app/structree/id6769936533)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $4.99 | one-time |
| Pro Lifetime | $14.99 | one-time |


### Nubble Notes

[App page](https://appshunter.io/ios/app/nubble-notes-mind-map-and-ideas/id6797114391)

Organize your thoughts visually with interconnected bubbles. Nest notes and ideas, tag them with confidence levels, and link related concepts. This app allows for flexible organization that adapts to your thinking process.

**Highlights:** Visual bubble organization, Nested notes and bubbles, Multi-bubble note placement, Confidence tagging system, Linked idea connections, Password-protected private bubbles, Import and search functionality

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

**In-app purchases:** none


## Frequently asked questions

### Is Structree free?

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

### Is Nubble Notes free?

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

### Do Structree or Nubble Notes have ads?

Structree shows ads; Nubble Notes does not.

### Which is updated more often, Structree or Nubble Notes?

Structree ships an update every 5 days, and Nubble Notes every 5 days. Most recently, Structree was updated on October 8, 2026 and Nubble Notes on October 11, 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.*