# Tide Chart Master vs 完美日历

The clearest difference is monetization model: 完美日历 at free against Tide Chart Master's subscription. 完美日历 also leads on update cadence (every 3 weeks vs every 4 months). Tide Chart Master's advantage is iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Tide Chart Master sells 8 in-app purchases, starting at $0.99 per month and 完美日历 sells 7 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Tide Chart Master ships an update every 4 months, 完美日历 every 3 weeks. The most recent releases landed on July 6, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Tide Chart Master | 完美日历 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (7 ratings)](https://appshunter.io/ios/app/tide-chart-master/id6467185147/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | Subscription | **Free** |
| Size | 36 MB | 56 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [苗 何](https://appshunter.io/developer/1814015097) | [长武 吴](https://appshunter.io/developer/1730512006) |

## What reviewers say

### Tide Chart Master

[App page](https://appshunter.io/ios/app/tide-chart-master/id6467185147)

Access global tide charts with intuitive line graphs and 7-day weather forecasts. Includes tools for temperature, humidity, air quality, decibel detection, and a compass for navigation.

**Highlights:** Global tide chart viewing, 7-day weather forecast, Sunrise/sunset times, Temperature and humidity measurement, Air quality and decibel detection, Compass for direction

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 誉贺全球潮汐：订阅月度专业版高级服务 | $0.99 | per month |
| Tide Chart: Weekly Subscription | $0.99 | per 7 days |
| 誉贺全球潮汐：订阅月度高级专业版服务 | $2.99 | per month |
| 誉贺全球潮汐：订阅半年专业版高级服务 | $3.99 | per 6 months |
| Tide Chart: Weekly Subscription | $4.99 | per 7 days |
| 潮汐表：高级权限季度订阅 | $9.99 | per 3 months |
| 誉贺全球潮汐：订阅半年高级专业版服务 | $14.99 | per 6 months |
| Tide Chart: Quarterly Subscription | $24.99 | per 3 months |


### 完美日历

[App page](https://appshunter.io/ios/app/id6478230940)

This utility app provides a comprehensive calendar with holiday tracking, auspicious date selection for events, and a built-in compass. It also offers features like a daily fortune, large time display, and a retirement age calculator.

**Highlights:** 万年历 (Perpetual Calendar), 节假日查询 (Holiday lookup), 吉日查询 (Auspicious date finder), 罗盘 (Compass), 每日一卦 (Daily fortune), 时间屏幕 (Time screen), 退休年龄计算器 (Retirement age calculator)

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 一个月会员 | $0.99 | one-time |
| 半年会员 | $3.99 | one-time |
| 半年会员 | $4.99 | one-time |
| 一年会员 | $6.99 | one-time |
| 一年会员 | $9.99 | one-time |
| 永久会员 | $19.99 | one-time |
| 永久会员 | $39.99 | one-time |


## Frequently asked questions

### Is Tide Chart Master free?

Tide Chart Master is free to download, with in-app purchases available.

### Is 完美日历 free?

完美日历 is free to download, with in-app purchases available.

### Do Tide Chart Master or 完美日历 have ads?

Neither Tide Chart Master nor 完美日历 shows ads.

### Which is updated more often, Tide Chart Master or 完美日历?

Tide Chart Master ships an update every 4 months, and 完美日历 every 3 weeks. Most recently, Tide Chart Master was updated on July 6, 2026 and 完美日历 on September 17, 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.*