# Idea Think vs PDF Editor for iPhone

The clearest difference is update cadence: Idea Think at every 6 days against PDF Editor for iPhone's monthly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Idea Think sells 1 one-off in-app purchase and PDF Editor for iPhone sells 5 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Idea Think ships an update every 6 days, PDF Editor for iPhone monthly. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Idea Think | PDF Editor for iPhone |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 6 days** | Monthly |
| Monetization | Free | — |
| Size | 28 MB | 107 MB |
| Requires iOS | **15.0** | 15.5 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Man Chi CHoi](https://appshunter.io/developer/1804620702) | [EXERCISE RX LLC](https://appshunter.io/developer/1850404326) |

## What reviewers say

### Idea Think

[App page](https://appshunter.io/ios/app/idea-think-thought-organizer/id6760612399)

Capture, organize, and visualize your thoughts with a mind mapping tool. Branch ideas naturally, search your entire library, and export your thinking as PDFs. Keep your ideas private and offline.

**Highlights:** Capture ideas in one tap, Unlimited branching, Interactive Tree Map view, Search by text or tag, Export as PDF, Private and offline storage

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| IdeaThinkPro | $1.99 | one-time |


### PDF Editor for iPhone

[App page](https://appshunter.io/ios/app/pdf-editor-for-iphone/id6761690964)

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly-Trial | $4.99 | per 7 days |
| Weekly | $4.99 | per 7 days |
| Monthly | $12.99 | per month |
| Yearly | $39.99 | per year |
| Lifetime | $59.99 | one-time |


## Frequently asked questions

### Is Idea Think free?

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

### Is PDF Editor for iPhone free?

PDF Editor for iPhone is free to download, with in-app purchases available.

### Do Idea Think or PDF Editor for iPhone have ads?

Neither Idea Think nor PDF Editor for iPhone shows ads.

### Which is updated more often, Idea Think or PDF Editor for iPhone?

Idea Think ships an update every 6 days, and PDF Editor for iPhone monthly. Most recently, Idea Think was updated on October 31, 2026 and PDF Editor for iPhone on November 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.*