# Tide Chart Master vs KeyQR

The clearest difference is in-app purchases: KeyQR at none against Tide Chart Master's 8. KeyQR also leads on update cadence (every 4 days vs every 4 months). Tide Chart Master's advantage is iOS requirement (13.0 vs 17.6). On price, ads 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. KeyQR asks for nothing beyond the download.

Tide Chart Master ships an update every 4 months, KeyQR every 4 days. The most recent releases landed on September 24, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Tide Chart Master | KeyQR |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (7 ratings)](https://appshunter.io/ios/app/tide-chart-master/id6467185147/reviews)** | — |
| Number of ratings | **7** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 4 days** |
| Monetization | Subscription | — |
| Size | 36 MB | 4 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [苗 何](https://appshunter.io/developer/1814015097) | [Jean-Yves Nocart](https://appshunter.io/developer/1852806245) |

## 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 |


### KeyQR

[App page](https://appshunter.io/ios/app/keyqr/id6783452150)

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

**In-app purchases:** none


## Frequently asked questions

### Is Tide Chart Master free?

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

### Is KeyQR free?

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

### Do Tide Chart Master or KeyQR have ads?

Neither Tide Chart Master nor KeyQR shows ads.

### Which is updated more often, Tide Chart Master or KeyQR?

Tide Chart Master ships an update every 4 months, and KeyQR every 4 days. Most recently, Tide Chart Master was updated on September 24, 2026 and KeyQR on October 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.*