Dive log app for Android: log dives offline on your phone

Your phone is the one device you have at every dive site, on every boat and in every hotel room. A dive log app on Android lets you write each dive up while it is fresh, instead of filling in a paper logbook days later from memory. This guide covers what to look for, how to set the app up before a trip, and how to keep the records safe. It uses DIVEOPS PRO, which is on Google Play, as the example.

What to look for in an Android dive log app

• Offline first. Boats, islands and offshore worksites often have no signal. The app should save each dive on the phone the moment you tap save, and sync later.
• A clear sync state. You should be able to see which dives have reached your account and which are still only on the phone.
• The fields you actually use. Recreational divers want site, depth, time, gas, buddy and conditions. Technical divers need gas mixes and rebreather details. Working divers need the client, task, worksite and supervisor.
• Import and export in open formats. Your dive history should never be locked in one app.
• Sign-off. If an instructor or supervisor signs your dives, the signature should be tied to the exact entry.
• Your data stays yours. You should be able to export everything and delete your account from inside the app.

Setting up before a trip

Do this at home or in the hotel, while you have a good connection:

1. Install DIVEOPS PRO from Google Play and sign in.
2. Import your past dives (see below), so your totals and history are complete.
3. Open the screens you will use, so they are ready with no signal.
4. If a supervisor or instructor will sign your dives, set up their access while you both have a connection. Signing by QR code works with no signal, but only for dives that have already synced once.
5. Charge the phone, use a waterproof case on deck, and follow the boat's or site's rules on phones.

Logging a dive with no signal

After the dive, open the app and add a new dive. Enter the date, site, maximum depth, times, gas and anything worth remembering. Save it. The phone does not measure depth or time itself, so take these from your dive computer, depth gauge or the supervisor's record. The dive is now on your phone and marked as waiting to sync. When the phone next has a connection, it is sent to your account. You don't need to do anything else.

Two habits help:

• Log straight after the dive, from your dive computer and the dive briefing, while the details are fresh.
• Edit a dive on one device at a time. If the same dive is changed on the phone and the computer before they sync, the app shows a conflict and lets you decide. Nothing is overwritten silently.

For long trips with no internet, read our full guide to offline dive logging.

Bringing your old dives in

Most dive software, and Subsurface, can export your logbook as UDDF, an open dive-data format. DIVEOPS PRO imports UDDF, CSV and Subsurface files. Each dive arrives as a draft for you to check, and dives already in your logbook are flagged and left out unless you choose them. Nothing is merged. The app does not read dive computers over Bluetooth yet, so download from the computer with its own software first. See moving your dive history for step-by-step help, including paper logs.

Keeping your records safe

• Sign in, so your dives are in your account and not only on the phone.
• Export now and then. The Android app shares your logbook as a CSV file. At diveopspro.com you can also export it as UDDF or a full JSON backup, and any dive as a PDF.
• Keep your paper logbook if your agency, employer or regulator requires one. The app is a digital companion to your official logbook, not a replacement. Read what a digital dive logbook should do.

On iPhone or a computer

The same account works in any browser at diveopspro.com. On iPhone, open it in Safari and add it to the Home Screen (how to install); an iPhone app is coming. Your logbook stays the same on every device.

Get the app

Install DIVEOPS PRO from Google Play, log your last dive, and see plans and prices for the professional tools.