# 知己交友 vs PGDwatch

The clearest difference is rating: PGDwatch at 5.0 against 知己交友's 3.0. PGDwatch also leads on in-app purchases (none vs 10) and ads (none vs shown). 知己交友's advantage is update cadence (every 3 weeks vs every 4 months) and ratings volume (10 vs 1). On price, device support and iOS requirement there is nothing between them.

Both are free to download. 知己交友 sells 10 one-off in-app purchases. PGDwatch asks for nothing beyond the download.

PGDwatch holds the better App Store score, 5.0 against 3.0. That said, the two scores are not equally well evidenced: 知己交友 has 10 ratings behind it against 1, so its average is the more settled of the two.

知己交友 ships an update every 3 weeks, PGDwatch every 4 months. The most recent releases landed on November 1, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | 知己交友 | PGDwatch |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (10 ratings)](https://appshunter.io/ios/app/id425080956/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/pgdwatch/id1450479149/reviews)** |
| Number of ratings | **10** | 1 |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Every 4 months |
| Monetization | — | Free |
| Size | 128 MB | 59 MB |
| Requires iOS | 9.0 | 9.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [少文 龙](https://appshunter.io/developer/425080959) | [Pinguanda](https://appshunter.io/developer/909530819) |

## What reviewers say

### 知己交友

[App page](https://appshunter.io/ios/app/id425080956)

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 12元钻石 | $1.99 | one-time |
| 知己真会员认证费 | $3.99 | one-time |
| 98元心币 | $14.99 | one-time |
| 98元钻石 | $14.99 | one-time |
| 98元vip会员 | $14.99 | one-time |
| 198元vip会员 | $29.99 | one-time |
| 198元钻石 | $29.99 | one-time |
| 298元钻石 | $46.99 | one-time |
| 终身VIP会员 | $74.99 | one-time |
| 终身皇冠会员 | $139.99 | one-time |


### PGDwatch

[App page](https://appshunter.io/ios/app/pgdwatch/id1450479149)

This app connects to a smartwatch to track your fitness and sleep data. It allows for personalized settings like alarms and step goals, offering convenience for daily life.

**Highlights:** Real-time exercise data recording, Heart rate monitoring, Sleep status tracking, Life alarm settings, Step goal customization

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 知己交友 free?

知己交友 is free to download, with in-app purchases available.

### Is PGDwatch free?

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

### Which has better reviews, 知己交友 or PGDwatch?

PGDwatch is rated higher. 知己交友 averages 3.0 out of 5 from 10 ratings, while PGDwatch averages 5.0 from 1 ratings.

### Do 知己交友 or PGDwatch have ads?

知己交友 shows ads; PGDwatch does not.

### Which is updated more often, 知己交友 or PGDwatch?

知己交友 ships an update every 3 weeks, and PGDwatch every 4 months. Most recently, 知己交友 was updated on November 1, 2026 and PGDwatch on October 7, 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.*