# 要事四象限 vs LocalBrain AI

The clearest difference is price: LocalBrain AI at Free against 要事四象限's $0.99. LocalBrain AI also leads on update cadence (weekly vs every 33 months). 要事四象限's advantage is in-app purchases (none vs 3) and iOS requirement (15.6 vs 26.0).

LocalBrain AI is free to download; 要事四象限 costs $0.99 up front. LocalBrain AI sells 3 one-off in-app purchases. 要事四象限 asks for nothing beyond the download.

要事四象限 ships an update every 33 months, LocalBrain AI weekly. The most recent releases landed on October 10, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | 要事四象限 | LocalBrain AI |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Update frequency | Every 33 months | **Weekly** |
| Size | 17 MB | 44 MB |
| Requires iOS | **15.6** | 26.0 |
| Devices | — | **iPhone** |
| Age rating | 4+ | 17+ |
| Developer | [超 孟](https://appshunter.io/developer/666754845) | [YI-HONG Lin](https://appshunter.io/developer/597293723) |

## What reviewers say

### 要事四象限

[App page](https://appshunter.io/ios/app/id6448916763)

**In-app purchases:** none


### LocalBrain AI

[App page](https://appshunter.io/ios/app/localbrain-ai/id6768289881)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| LocalBrain Pro 1 Month | $2.99 | one-time |
| LocalBrain Pro | $19.99 | one-time |
| LocalBrain Pro 1 Year | $29.99 | one-time |


## Frequently asked questions

### Is 要事四象限 free?

要事四象限 costs $0.99, with no in-app purchases.

### Is LocalBrain AI free?

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

### Which is updated more often, 要事四象限 or LocalBrain AI?

要事四象限 ships an update every 33 months, and LocalBrain AI weekly. Most recently, 要事四象限 was updated on October 10, 2026 and LocalBrain AI on October 29, 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.*