Comparison

广东省空气质量实况与预报手机发布系统Pub vs US Tide Charts

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

广东省空气质量实况与预报手机发布系统Pub

Features
Read full description

广东省空气质量App 快速查看: —区域:珠三角、粤东、粤西、粤北空气 质量预报 —预报:广东省空气质量预报数据 —地图:城市预报、城市实况、站点实况 —城市:广东省所有城市实况数据

About

US Tide Charts

Features
Read full description

Marevia is a tide chart app for the US coast. It covers more than 3400 stations and shows high and low tide times, tide heights and the daily tide curve. A full year ahead, with no day limit Move freely to any date up to a year out, not just today. Plan a trip or a fishing day months in advance. Three ways to find a station Search by name or state code, browse the map, or sort by distance from where you are. Location access is optional, and search and the map still reach every station without it. All your spots in one list Save the places you check often and see the next high or low tide for each of them at a glance. Tide alerts Choose how many minutes before a high or low tide you want to be notified, and pick the days of the week. Times are never converted Every time shown is the local time at the station exactly as issued, including daylight saving. Nothing is shifted to your device time zone, so nothing drifts by an hour. Display settings Switch tide height between ft and m, and time between 12-hour and 24-hour. Take your data with you Export your saved places and settings as a JSON file at any time. About Premium High and low tide times stay open to everyone. Premium removes the banner, lifts the limits on saved places and alerts, adds a monthly view of a whole month at once, and shows the six-minute interval curve where the station supports it. Coverage Covers the coasts of the continental US, Alaska, Hawaii and the territories. Tides outside those areas are not supported. Made for fishing, surfing, tide pooling, clamming, kayaking and coastal photography. Terms of Use (EULA): https://show-ec09e.web.app/terms.html Privacy Policy: https://show-ec09e.web.app/privacy.html Terms of Use (EULA): https://show-ec09e.web.app/terms.html Privacy Policy: https://show-ec09e.web.app/privacy.html

Screenshots

广东省空气质量实况与预报手机发布系统Pub1 screens
US Tide Charts4 screens

Verdict

The call

The clearest difference is in-app purchases: 广东省空气质量实况与预报手机发布系统Pub at none against US Tide Charts's 2. 广东省空气质量实况与预报手机发布系统Pub also leads on ads (none vs shown) and iOS requirement (7.0 vs 15.0). On price, update cadence 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. US Tide Charts sells 2 in-app purchases, starting at $4.99 per month. 广东省空气质量实况与预报手机发布系统Pub asks for nothing beyond the download.

UpkeepUpdate frequency

广东省空气质量实况与预报手机发布系统Pub ships an update every 3 months, US Tide Charts every 2 months. The most recent releases landed on November 3, 2026 and November 6, 2026 respectively.

Scorecard3 real differences · 3 level
广东省空气质量实况与预报手机发布系统Pub versus US Tide Charts: the parameters behind the verdict, then further details
Parameter广东省空气质量实况与预报手机发布系统PubUS Tide Charts
PriceFreeFree
Update frequencyEvery 3 monthsEvery 2 months — better
AdsNo — betterYes
In-app purchasesNo — betterYes
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS7.0 — better15.0
Further details — not scored
Size29 MB85 MB
Age rating4+4+
Developer广东旭诚科技有限公司kota tada

In-app purchases

None

广东省空气质量实况与预报手机发布系统Pub

No in-app purchases

2 purchases

US Tide Charts

Subscriptions2
  • Premium (1 month)7 Days trial$4.991 Month
  • Premium (1 year)14 Days trial$49.991 Year

Questions

Is 广东省空气质量实况与预报手机发布系统Pub free?
广东省空气质量实况与预报手机发布系统Pub is free to download, with no in-app purchases.
Is US Tide Charts free?
US Tide Charts is free to download, with in-app purchases available.
Do 广东省空气质量实况与预报手机发布系统Pub or US Tide Charts have ads?
US Tide Charts shows ads; 广东省空气质量实况与预报手机发布系统Pub does not.
Which is updated more often, 广东省空气质量实况与预报手机发布系统Pub or US Tide Charts?
广东省空气质量实况与预报手机发布系统Pub ships an update every 3 months, and US Tide Charts every 2 months. Most recently, 广东省空气质量实况与预报手机发布系统Pub was updated on November 3, 2026 and US Tide Charts on November 6, 2026.

Other comparisons