Tides and Currents provide 1343 harmonic tide stations,2199 subordinate tide stations and 849 harmonic current stations, 1707 subordinate current stations of USA. This app predicts tides and currents by using harmonic analysis calculations with Harmonic Constituents which can be get from NOAA website. So the APP can provide tide and current data without network。
Since calculations are performed locally on the device, tide and current data can be viewed for any date. In addition, the APP also provides sunrise,sunset, moonrise , moonset, dusk,dawn, moon phase of every day.
In addition, the app provide tide map forecast.

Disclaimer: The App loads astronomical tide level and tidal current data, which does not include changes in water levels and residual currents caused by meteorological or other factors. Under special circumstances, the impact of hurricanes, cold waves, floods and other factors should also be considered. Do not use Tides and Currents for navigation purpose or any other purpose that may result in personal injury or property damage.

【Pro】
1.No limit date for tides and currents
2.Select date directly with calendar
3. Month table for tides and currents
4.Unlock widget
5. Map forecast for 7 days.

Purchase Notes:
1. The account will be automatically renewed and deducted the corresponding fee 1 day before the expiration.
2. If you need to cancel the renewal, please cancel in your personal iTunes account at least 1 day in advance.
3. After purchase, users can manage or turn off automatic renewal in personal account settings.

Terms of Services :
https://www.astronomyobserver.net/h5/tidesandcurrents/user
Privacy policy:
https://www.astronomyobserver.net/h5/tidesandcurrents/privacy