Tap the "No cloud mode" button. The app will only store dive log information locally on your device. After the first start the dive log will therefore be empty.

The Subsurface maintainer provides a dedicated and free Internet cloud storage account for users of Subsurface and Subsurface-mobile. You can use this to store your dive log and to share your data between various computers and devices. The Subsurface team never accesses your dive data without explicit permission to do so, the data are not used for any other purpose than providing them to the user who created them. There are no ads and no harvesting / analysis of the data stored in the Subsurface Cloud storage. There is no monetization whatsoever.

Subsurface-mobile is sufficient to fully maintain a dive log. In addition you can use the more advanced features in Subsurface when you have access to a computer while still being able to work with your dive data when only a mobile device is available.

The dive data in the cloud are cached locally on any device or computer that is connected to the Subsurface Cloud account. It is easy to create backups of the data (for example in XML format) on the desktop: both the mobile device and the desktop keep a local copy of the data so that the dive log is always accessible, even without Internet connection.

To create a Subsurface Cloud account follow these steps:

1) Enter an e-mail address and a password in the fields indicated on the screen (see image above). The e-mail address should be in lower case and the password should contain a combination of upper and lower case letters and/or numbers.

2) Tap the "Sign-in or Register" button.

If you have already set up an account on a different computer or device, simply enter the same credentials here. Subsurface-mobile will now download your existing dive log data. Once the dive list has been downloaded from the cloud, Subsurface-mobile usually works only with the the local copy on the mobile device. This avoids long delays or even failure of operations if there is a bad (or no) internet connection, a situation fairly common at many dive sites. Remember to manually sync with the server after making local changes (either by pulling down on the dive list, or by using the manual sync entry in the Dive management menu entry).

3) If this is a new cloud account, a PIN screen will open (see right image above). A PIN is e-mailed to the email address entered in the previous step. Enter this PIN into the field indicated and tap the Register button. After the PIN has been entered it is no longer needed - it just proves that this is indeed your email account.

At this point a new account has been created for you on the cloud server and access to the cloud is enabled. In this case the dive list is initially empty. Start entering dives in the dive log or download dive information from a supported dive computer.

Once registered, Subsurface-mobile remembers the cloud credentials and it is not necessary to provide these again when launching the program.

The left action button shows three horizontal lines of declining length, symbolizing a filter. When you tap this button, a text entry line appears at the top of screen which will allow you to enter a filter search term that is either used in a full text search, a search just of the people involved in a dive (in the Divemaster and Buddy fields), or a search of the tags you have used to classify your dives. Tapping the filter button again clears the filter and shows the full dive list.

When you tap on a dive in the Dive List, a Dive Details page with the dive profile and many important details about the dive is opened. You can use a pinch gesture to zoom into the profile. Tapping and holding with one finger (until the profile becomes translucent) allows you to pan the profile and see more details in specific parts of the profile.

You can view other dives by swiping the Details view to the right (for the previous dive) or to the left (next dive). Using the Action Bar, it is also possible to delete the dive (tap the Trash Icon on the Action Bar) or to view the dive location on an integrated map viewer.

The context menu (accessible by tapping on the vertical three dots in the lower right corner of the screen) offers additional options to move dives between trips, the same delete and map options already mentioned, and access to the undo and redo facility that allows you to step backwards and forwards through recent changes.

In the Details View, you can either tap the name of a dive site or the GPS pin on the left hand side of the Action Button at the bottom of the screen in order to open a map with the dive site in an integrated map viewer. This of course is only possible if the dive site is associated with GPS information.

At the bottom of the Dive Details screen, the action button is a pencil. Tapping the pencil button changes the page and enables editing the dive details, e.g. adding text to the dive notes or changing the names or values of some of the information (see image on left). It may be necessary to scroll the window to access all the available fields. At the bottom of the edit screen is a Save action button. Tap this to save the new information, after which the dive list screen is updated and displayed. To cancel any edits, tap the Android Back Button or the application back button at the top left of the screen on iOS.

You can delete a dive from the dive list by long-pressing a dive and selecting delete in the context menu. You can also delete a dive from the Details View by tapping on the trash can icon on the right side of the Action Button

If you deleted the wrong dive by mistake you can easily undo the operation in the context menu.

You can manually add a dive to the existing dive list. On the dive list tap the "plus"-icon in the action bar, or use the main menu and tap Dive management → Add dive manually. This opens a screen that is identical to the editing screen described above. When a dive is added manually, you cannot directly add a dive profile from a dive computer. However, if you do not use a dive computer, the duration, depth and several other bits of information about the new dive can be entered. The Action button at the bottom of the screen contains a disk symbol. Tap this to save the new dive. To cancel any edits, tap the Back button. The left-hand image below shows a screenshot of a dive being created and the right-hand image shows the same dive in Details View.

There are several ways to get to the Download Page. You can either tap on the main Action Button on the bottom of the Dive List, or you can select Dive management → Download from DC in the main menu. On Android devices, when you plug in a USB serial cable for a dive computer, the Download Page will be opened automatically.

The download feature on smartphones supports only a limited number of dive computers. On Android devices these are typically dive computers using a serial USB interface using a USB OTG cable or a simple USB C-A adapter on newer devices. Android devices also support Bluetooth dive computers that are supported in Subsurface on the desktop. Both Android and iOS devices allow direct download of dive data from a handful of Bluetooth LE enabled dive computers.

Use the Vendor name and Dive Computer drop-downs to pick the correct dive computer. For instance, when using a Shearwater Petrel dive computer, the vendor is Shearwater and the product is Petrel(see left image below - section Start the download).

TODO: image of DL missing - or link to the 7.2.3 Start the download

When downloading from multiple different dive computers, shortcut buttons appear below the drop-downs to easily switch between them. In the Settings menu you can remove these buttons, a useful feature for removing buttons of dive computers that you do not use any more. Achieve this by selecting the option Forget remembered dive computers in the Settings menu.

As the name indicates, this ensures that the local changes on the mobile device and changes made by other devices and computers to the data stored in the Subsurface Cloud are synchronized. It is highly recommended to sync with cloud storage after downloading new dives from a dive computer or manually adding or editing dive information on the mobile device.

This can also be triggered by pulling down (and briefly holding) the Dive List.

By default Subsurface-mobile runs offline and only syncs the dive list with cloud storage when explicitly told to do so (see the previous entry above). You can choose to always sync with the cloud servers. This is not recommended unless you are in an area with a fast and reliable internet connection, as otherwise Subsurface-mobile might appear to hang between operations as it tries to connect to the cloud server. Selecting Enable cloud auto sync causes the local dive log to be synchronized with the copy in the cloud after most changes as well as (on Android) every time that Subsurface-mobile is closed. iOS doesn’t support the concept of closing an app (you can just kill it, which doesn’t allow for a final sync with the cloud). In general it is safer to manually sync with the cloud once you are done making changes in Subsurface-mobile.

The Dive Summary page provides a very simple overview of your diving activities - which can for example be useful when documenting total dive experience and recent dive activity for a dive center at the beginning of a dive trip.

The summary page lists the date of your first dive in the dive list as well as your most recent dive. It also provides two columns of data for selectable time ranges (by default all dives in the dive list and the dives during the last six months.

The Export feature is somewhat experimental. On Android it only allows the upload of your dive list to two websites (divelogs.de and diveshare). On iOS it also allows local file based exports as Subsurface specific XML files (both for dives and dive sites) as well as UDDF.

Tapping on Next opens an additional page for login information (or a file selection dialog).

For most users, the defaults for tracking GPS locations will be appropriate. If you would like to change them, go to the Main Menu, select the Settings screen, and open the Advanced area on that page. Here you will find the section for configuring the GPS service (see image below). GPS location data are collected at regular intervals, e.g. every 5 minutes, or at regular distances, e.g. after the boat has moved more than 200m, or a combination of both of these approaches. Provide the appropriate information and tap the Back button. The program is now ready to collect GPS positions.

After running the location service during a dive trip, first either download the dives from your dive computer or manually enter the dives into the dive list. Now you can apply the GPS positions to these dives. From the Dive management menu, tap Apply GPS fixes. The dive list contains the start and end times of each dive. Now, Subsurface-mobile applies the first GPS position that falls within the dive period of each dive. This results in a GPS position for each dive that is saved as part of the dive log.

The locations of all dives in the dive list can be viewed from the Location menu by selecting the Map option. A satellite image of the world is shown. At that scale no dive sites are shown. If you zoom into a particular region of the world the dive sites appear, indicated by red flags. Zooming in even closer indicates the names of each of the different dive sites.

Here you can pick metric, imperial, or personalized units for the user interface. In most cases Subsurface-mobile should pick the regionally typical unit system for your location.

As the name indicates, most users will not need to make changes here.

This page shows you the exact version of Subsurface-mobile that you are running and provides a convenient way to copy the application logs to the clipboard.

This menu entry opens the online version of this user manual in the native browser of your device. Unfortunately this option isn’t available if your device is offline.

This item opens your default email client with a pre-populated email to the Subsurface support alias and copies the app logs into that email. Simply add your question or the but that you are reporting and send us your message.

As mentioned earlier in this manual, this is a convenient link to a web page that allows you to reset the password for your Subsurface Cloud account.