CDT VN vs Tide Chart Master
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CDT VN
This system helps fishermen manage their catch logs, transfers, and port permits. It also assists processing plants in obtaining origin certificates for seafood products and enables authorities to oversee fishing and export activities.
- Catch log management
- Fishing transfer tracking
- Port entry/exit permits
- Seafood origin certificates
- Fishing and export data management
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Hệ thống phần mềm quản lý nguồn gốc đánh bắt VIệt Nam (CDTVN): - Hỗ trợ cho Ngư dân quản lý thông tin đánh bắt như nhật ký đánh bắt, chuyển tải, xin giấy phép ra vào cảng, xác nhận khối lượng đánh bắt. - Hỗ trợ các nhà máy chế biết, xuất khẩu xin giấy chứng nhận nguồn gốc sản phẩm đánh bắt hải sản. - Hỗ trợ chính quyền quản lý thông tin đánh bắt, xuất khẩu của ngư dân và doanh nghiệp.
Tide Chart Master
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.
- Global tide chart viewing
- 7-day weather forecast
- Sunrise/sunset times
- Temperature and humidity measurement
- Air quality and decibel detection
- Compass for direction
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The Tide Chart supports viewing tides in multiple regions around the world. Through a clear and easy-to-understand line chart, you can intuitively check the changing trend of tides. While checking the tides, it also supports viewing the 7-day weather forecast and sunrise/sunset times. It provides a variety of practical tools, including temperature measurement, humidity measurement, air quality measurement, and decibel detection. The compass helps you clearly distinguish directions and avoid getting lost when checking the tides. Subscription Instructions: -- Subscription Types: Monthly Subscription, Semi-annual Subscription, Weekly Subscription, Quarterly Subscription. -- Subscription Price: Please refer to the subscription page within the app for specific subscription prices. -- Subscription Payment: When you confirm the purchase of a subscription, the payment will be deducted and charged to your iTunes account. -- Subscription Renewal: The subscription will be automatically renewed and charged within 24 hours before the current period expires. After the charge is successful, the subscription period will be extended to the next cycle. -- Subscription Cancellation: If you need to cancel the renewal service, you must do so at least 24 hours before the end of the current subscription period. The specific steps are: open your mobile phone → enter Settings → click "Apple ID" → select the "Subscriptions" page → choose the subscription you want to cancel. Privacy Policy: https://www.yuque.com/jiangdiwangjide/iwnktm/wys3zw46efxxixfb?singleDoc# Terms of Service: https://www.yuque.com/jiangdiwangjide/iwnktm/fgfc5ghovdgo9he4?singleDoc#
Screenshots
Verdict
The clearest difference is in-app purchases: CDT VN at none against Tide Chart Master's 8. CDT VN also leads on update cadence (every 2 days vs every 4 months). Tide Chart Master's advantage is iOS requirement (13.0 vs 15.5). On price, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Tide Chart Master sells 8 in-app purchases, starting at $0.99 per month. CDT VN asks for nothing beyond the download.
CDT VN ships an update every 2 days, Tide Chart Master every 4 months. The most recent releases landed on October 3, 2026 and September 24, 2026 respectively.
| Parameter | CDT VN | Tide Chart Master |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.4 (7 ratings) — better |
| Positive reviews | 15.4% of reviews | — |
| Number of ratings | — | 7 — better |
| Update frequency | Every 2 days — better | Every 4 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Subscription |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.5 | 13.0 — better |
| Further details — not scored | ||
| Size | 71 MB | 36 MB |
| Age rating | 17+ | 4+ |
| Developer | GEOGRAPHY SOFTWARE JOINT STOCK COMPANY | 苗 何 |
Customer experience
CDT VN
Tide Chart Master
In-app purchases
CDT VN
No in-app purchases
Tide Chart Master
- 誉贺全球潮汐：订阅月度专业版高级服务3 Days trial$0.991 Month
- Tide Chart: Weekly Subscription3 Days trial$0.997 Days
- 誉贺全球潮汐：订阅月度高级专业版服务3 Days trial$2.991 Month
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- 誉贺全球潮汐：订阅半年专业版高级服务3 Days trial$3.996 Months
- Tide Chart: Weekly Subscription3 Days trial$4.997 Days
- 潮汐表：高级权限季度订阅3 Days trial$9.993 Months
- 誉贺全球潮汐：订阅半年高级专业版服务3 Days trial$14.996 Months
- Tide Chart: Quarterly Subscription3 Days trial$24.993 Months
