# 松树自律 vs NudgeDuck

The clearest difference is price: NudgeDuck at Free against 松树自律's $0.99. On update cadence, ads, in-app purchases and device support there is nothing between them.

NudgeDuck is free to download; 松树自律 costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 6 days. The most recent releases landed on October 7, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | 松树自律 | NudgeDuck |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 days | Every 6 days |
| Size | 16 MB | 57 MB |
| Requires iOS | 17.0 | **16.4** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Xiamen Kuaile Xiaotian Intelligence Technology Co., Ltd.](https://appshunter.io/developer/1677484995) | [鼎 陈](https://appshunter.io/developer/6775880644) |

## What reviewers say

### 松树自律

[App page](https://appshunter.io/ios/app/ai/id6446350660)

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

**In-app purchases:** none


### NudgeDuck

[App page](https://appshunter.io/ios/app/nudgeduck/id6776111860)

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

**In-app purchases:** none


## Frequently asked questions

### Is 松树自律 free?

松树自律 costs $0.99, with no in-app purchases.

### Is NudgeDuck free?

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

### Do 松树自律 or NudgeDuck have ads?

Neither 松树自律 nor NudgeDuck shows ads.

### Which is updated more often, 松树自律 or NudgeDuck?

松树自律 ships an update every 6 days, and NudgeDuck every 6 days. Most recently, 松树自律 was updated on October 7, 2026 and NudgeDuck 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.*