There are many ‘Apps’ that may be of use to Divers and Dive Managers. Here are a few, Android and some on Apple, most are on both. Some you pay for and others free. You can also use a lot of them on PC or Mac. The best thing to do is try everything that is interesting, find the one that works best for you and delete the rest. Be careful of your App settings as some Apps like to be in constant contact but you can usually alter settings so they only ‘phone home’ when they are connected by Wi-fi.
Dive Logs
Dive Log https://play.google.com/store/apps/details?id=com.divinglog.divelog&hl=en_US
Dive Mate https://play.google.com/store/apps/details?id=com.confitek.divemateusb&hl=en_US
Weather
Magic Seaweed https://apps.apple.com/us/app/msw-surf-forecast/id322103952
Windfinder ( I find this one good for dive planning) https://apps.apple.com/us/app/windfinder/id336829635
Windy (a nice app to see the direction of the wind in real time) https://play.google.com/store/apps/developer?id=Windy+Weather+World+Inc
Met Office https://play.google.com/store/apps/developer?id=Met+Office
XC Weather (A free and easy to understand weather app suitable for dive planning) https://play.google.com/store/apps/developer?id=XCWeather
Tide Planners
Imray Tides Planner https://apps.apple.com/us/app/tides-planner/id317900837
Absolute tides https://play.google.com/store/apps/developer?id=Absolute+Development
Map/Charts
Navionics (not free) https://www.navionics.com/gbr/apps/navionics-boating
I Boating (gives one free chart) https://apps.apple.com/us/app/i-boating-marine-charts-gps/id994992062
Gas Mixing
V-Planner https://www.hhssoftware.com/v-planner/
Baltic Blender https://apps.apple.com/us/app/baltic-blender/id511697085
Decompression Planner
I Deco Pro (not free) https://apps.apple.com/us/app/ideco-pro/id329772936
Boat Watch
Boat Watch (If you would like to see which ship is about to run you down, this is your app! Great fun) https://apps.apple.com/us/app/boat-watch-spot-track-ships/id669023760