Ship's Log Book for Captains
Sail and Power Boat Logbook
Free · In-App Purchases
The Logbook App is an automated electronic logbook for your iPhone or iPad, you can add entries manually or have your vessel's log filled in automatically in the background. This logbook app was developed by sailors for sailors, but also motor boaters will get their money's worth.
FEATURES
# Automatically create logbook entries while you enjoy sailing
# Automatic retrieval of weather data for each entry from the internet (choose between different weather providers)
- Weather condition e.g. sunny, fog, thunderstorm...
- Air pressure (also offline if the device has a barometer)
- Wind direction
- Wind strength
- Degree of cloudiness
- Air temperature
- Water temperature
- Precipitation amount
- Significant wave height
# As well as other data fields per logbook entry that can be filled automatically
- Course over ground
- Course over ground
- Position in coordinates according to WGS84
- Position as text
- GPS accuracy
- Engine hours
- Log
# Automatic location e.g. "2.3 nm south of lighthouse Cape Savudrija".
# more fields to fill
- Water tank level
- Battery level
- Fuel tank level
- Grey water tank level
# add images to entries
# Sunrise and sunset times and nautical dawn and dusk times.
# Measure current heel and add to logbook entry
# Display GPS accuracy
# Display the distance travelled in colour (by speed or propulsion type motor/sail) on the chart.
# Statistics on the overall course and on each individual day
# Export the logbook as CSV for a spreadsheet programme
# Export as PDF
# Export as GPX
# Export as KML
# Export of the complete SQLite database
# Checklists: packing list and safety briefing
Please visit my website for more screenshots and more details!
NOTE:
Please note the following if you have enabled automatic logging in the background (indicated by the blue frame in the app):
Continued use of GPS in the background can drastically reduce battery life. In our experience, however, a whole day's sailing can be done with it, but don't forget the 12V charging cable ;-)
SUPPORT
This app is for a fee, so I take support very seriously! Please refrain from writing negative reviews without at least contacting me first. I have been able to solve every problem from buyers who have contacted me. I have also implemented many feature requests from buyers and am very grateful for constructive feedback! You can reach me this way:
* reach me via email which can be found at the support URL here in the store
* via Discord or Telegram, linked in the app here: Settings > Support
* send a message from the app via the menu item: Settings > Support
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
more Very beneficial, worths every peny!
Very beneficial, worths every peny!
New features, bug fixes and improvements:
- The last line in the PDF can now show both coordinates and location text on a single line when there are two separate lines
- Fixed an issue where, in certain configurations, text from the last column in the PDF was also printed on a separate page
- Reversed the order in which the track is rendered in the PDF, as otherwise each colour would be offset by one track segment relative to the map
- The PDF no longer displays just a single battery voltage value, but the minimum and maximum values for the day
- Typos corrected
2.88 14 Aug
New features, bug fixes and improvements:
- The weather cache is now reset when switching providers
- In the PDF export, entries with unknown COG/SOG values were displayed as 0 instead of ---
- If an NMEA RMC sentence had no COG/SOG (no value between the commas), it was incorrectly treated as zero; it is now correctly left out.
- After a course change, a value of 25 or more must be selected; otherwise, too many unexplained entries appear.
- Unused space in the header and on full-screen charts in A4 PDF format is now utilised
- On the chart (and in the PDF), you can now choose the colours used to colour-code the track according to its Mode
- Line breaks in the fuel tank help section have been corrected
- The list of votes for new features is randomly re-sorted every 24 hours
- Translation errors have been corrected
2.87 14 Jul
New features, bug fixes and improvements:
- Improved CSV export format for the list of maintenance entries
- Corrected NMEA status label for iPhone Mini
- Fixed an issue with detection when the NMEA connection is lost
- Option to receive a notification when the NMEA connection is lost
- In the last column of the PDF, unwanted line breaks could occur in certain configurations
- In the PDF export, the paper size can now be set to either A4 or Letter
- In the PDF, the table at the bottom left now shows all (up to four) fuel tank levels if available
- Fixed overly long headers in the PDF when using French
- Option to hide details during geocoding
- Updated text in the entry to distinguish between main engine mode and auxiliary engine mode
2.86 8 Jun
New:
- Wind arrows now step up in 5-knot increments instead of Beaufort increments.
- For multiple Quick Manoeuvres, a confirmation button appears at the top so you do not need to scroll.
Fixed:
- If the location field was empty, the app now shows bright text in dark mode.
- You can no longer enter more than one decimal point when logging engine hours.
- In PDFs, text in the last column no longer overlaps when set across two lines.
- Stability improvements to the NMEA overview.
- An incorrect value for GPS accuracy via NMEA in the data sources is fixed.
- The first water and fuel tanks are no longer shown as full in the first logbook entry when they do not exist.
- A sync error that distorted temperatures near 0 °C is fixed. 0.2 °C might show as 20 °C, and -0.1 °C might show as -10 °C.
- Icons in the icon order now show even when the logbook is empty.
2.85 24 Apr
With this update, I’d like to share a few personal thoughts. I’m switching the payment model for NEW users from a one-time fee to an affordable annual subscription. New users have plenty of time to test every feature without restrictions before they pay. For EXISTING CUSTOMERS who bought the app at any time, nothing changes. A subscription is optional and helps fund future development.
I hope that many existing users will also be able to support us voluntarily so that future features aren’t limited to new subscribers.
With that in mind, thank you very much in advance!
New features
- When selecting multiple Quick Manoeuvres at once, you can now change or set the type and Mode. The Mode stored in the Quick Manoeuvre is also taken into account
- Voting option for new features introduced
- The UISplitView on iPad can now be wider.
- The weather icon for calm conditions now looks different from the no-clouds icon.
Fixes:
- If you filtered the Log tab and found no results, the filter/search bar would disappear and you could not reset it.
- The search bar now stays in the correct position when you open the app and switch to Tab 1.
- Logbook entries now sort correctly after a time zone change.
- Hidden icons in the Log tab are now fully hidden.
- Translations and errors in the implementation of offer codes from the previous update
2.84 6 Apr
With this update, I’d like to share a few personal thoughts. I’m switching the payment model for NEW users from a one-time fee to an affordable annual subscription. New users have plenty of time to test every feature without restrictions before they pay. For EXISTING CUSTOMERS who bought the app at any time, nothing changes. A subscription is optional and helps fund future development.
I hope that many existing users will also be able to support us voluntarily so that future features aren’t limited to new subscribers.
With that in mind, thank you very much in advance!
New features
- When selecting multiple Quick Manoeuvres at once, you can now change or set the type and Mode. The Mode stored in the Quick Manoeuvre is also taken into account
- Voting option for new features introduced
- The UISplitView on iPad can now be wider.
- The weather icon for calm conditions now looks different from the no-clouds icon.
Fixes:
- If you filtered the Log tab and found no results, the filter/search bar would disappear and you could not reset it.
- The search bar now stays in the correct position when you open the app and switch to Tab 1.
- Logbook entries now sort correctly after a time zone change.
- Hidden icons in the Log tab are now fully hidden.
2.83 31 Mar
- The new fuel tank stats show clear values for consumption and costs.
- Maintenance entries in the Tools tab are now easier to use and offer many export options.
- You can set the last column in PDF exports.
- We added the first in-app instructions for maintenance entries, Quick Manoeuvres and fuel tank stats.
- You can hide engines you do not have.
- You can now view and change the engine speed in the entry (NMEA input has been possible for some time, but display and edit were not).
- PDF and statistics no longer calculate distance when there is no movement (at anchor, moored, etc.).
- Sync links now use the same layout on iOS and Android.
- Translations have been corrected.
2.82 24 Feb
Minor additional improvements to last week's major changes.
- Headers in PDF were incorrect when changing time zone from E->W in a logbook
- Sync stability improvement
- NMEA label position
- Water depth UI redesigned
- Fuel gauge caused the app to crash in rare cases
Here are the remaining new features:
- Some settings now have to be defined for each logbook. To avoid having to do this for each logbook, you can configure them in a template for new logbooks. For example, the engine settings and the number of tanks and their units.
- Entries without a position no longer count towards the log.
- NMEA values are smoothed (they are also smoothed on the plotter).
- Support for up to four fuel tanks.
- There is now a separate item in the entry for refuelling (quantity and costs, statistics to follow).
- The entire Settings tab has been completely redesigned. Highlights:
- Syncing is now easier than ever and can be easily turned on or off.
- An order can now be specified for most data sources. For example, if the GPS position from NMEA is not available, use the GPS from the iPhone/iPad.
- Recording intervals are visualised with examples of their intended use to avoid creating too few entries.
- Entries after a course change are now an integral part of the recording logic.
- Warnings are displayed when settings are not optimal and can be improved, e.g. when the internal barometer cannot be accessed.
- Note for WiFi-only iPads that do not have GPS.
- There is a new introduction when you first open the app, but you will not see this after an update, only after the initial installation.
- Deleting entries within a time period or deleting entire logbooks at once has been completely redesigned.
- New in quick manoeuvres
- These can now be linked to status changes to combine your own texts (such as 'Dock at the lock') with a status change.
- The associated status changes are now also compatible with distinguishing which engine is running for which reason (for propulsion or power generation).
- The Apple Watch now also supports the new quick manoeuvres.
- Stability for communication with the Apple Watch has been improved (there were occasional problems with older watches).
- Almost all settings from the old iOS settings have now been moved to the app, such as the filter for GPS accuracy.
- The feel and appearance when turning recording on/off has been improved.
- The complete settings on the map have been revised and are easier to use.
- Entries when stationary (anchored, moored, etc.) are no longer connected on the map, but this can be changed if necessary.
- All tanks (including water, etc.) can now be entered either by swiping or by tapping and using the keyboard.
- Only as many tanks are displayed as you have specified in the ship settings of the logbook.
- AI texts now also take into account whether it is a motorboat and there are no sails at all.
- Temperature UI revised.
- A new quick guide for empty logbooks.
2.81 29 Jan
Dear users, this is pretty much the biggest update ever. It's impossible to list all the changes here, but as always, if you have any questions or problems, please contact me. Now for the most important changes:
- Some settings now have to be defined for each logbook. To avoid having to do this for each logbook, you can configure them in a template for new logbooks. For example, the engine settings and the number of tanks and their units.
- Entries without a position no longer count towards the trip log.
- NMEA values are smoothed (they are also smoothed on the plotter).
- Support for up to four fuel tanks.
- There is now a separate item in the entry for refuelling (quantity and costs, statistics to follow).
- The entire Settings tab has been completely redesigned. Highlights:
- Syncing is now easier than ever and can be easily turned on or off.
- An order can now be specified for most data sources. For example, if the GPS position from NMEA is not available, use the GPS from the iPhone/iPad.
- Recording intervals are visualised with examples of their intended use to avoid creating too few entries.
- Entries after a course change are now an integral part of the recording logic.
- Warnings are displayed when settings are not optimal and can be improved, e.g. when the internal barometer cannot be accessed.
- Note for WiFi-only iPads that do not have GPS.
- There is a new introduction when you first open the app, but you will not see this after an update, only after the initial installation.
- Deleting entries within a time period or deleting entire logbooks at once has been completely redesigned.
- New in quick manoeuvres
- These can now be linked to status changes to combine your own texts (such as 'Dock at the lock') with a status change.
- The associated status changes are now also compatible with distinguishing which engine is running for which reason (for propulsion or power generation).
- The Apple Watch now also supports the new quick manoeuvres.
- Stability for communication with the Apple Watch has been improved (there were occasional problems with older watches).
- Almost all settings from the old iOS settings have now been moved to the app, such as the filter for GPS accuracy.
- The feel and appearance when turning recording on/off has been improved.
- The complete settings on the map have been revised and are easier to use.
- Entries when stationary (anchored, moored, etc.) are no longer connected on the map, but this can be changed if necessary.
- All tanks (including water, etc.) can now be entered either by swiping or by tapping and using the keyboard.
- Only as many tanks are displayed as you have specified in the ship settings of the logbook.
- AI texts now also take into account whether it is a motorboat and there are no sails at all.
- Temperature UI revised.
- A new quick guide for empty logbooks.
2.80 24 Jan
New
- Adaptations for iOS 26 with the new sidebar in the split view.
- GPX import dialogue completely revised
- Swipe on an entry from link changes the type between automatic and manual
Improvements to
- Improved performance for database maintenance tasks
- Track speed capped to a maximum of 130% of the log speed, in case two entries in quick succession lead to a much too high speed
- Export to PDF caused the app to crash if there was not a single day with more than one entry
- Fixed translation error
- Filter on the map showed wrong values when filtering entries without position
- You now always have to swipe the same distance on the tanks to fill/empty, regardless of the tank size
2.79 28/10/2025
- Fixed bug since iOS 26 where sometimes geocoding did not work
- Fixed a bug that could cause the app to crash with invalid MWV NMEA data sets.
- For time zones with 30 or 45 minutes difference to UTC, only full hours were taken into account when changing the time.
- Rounding of the blue frame adapted to new iPhone models
- Expiry date for water depths via DPT NMEA data sets
- Statistics now only show days with at least 2 entries with coordinates, and the PieChart ignores entries without coordinates
- Apple Watch showed motor sailing status again
- Fixed typos/translation errors
Note: Since the new iOS, the app sometimes hangs once a day when opening for about 30-40 seconds, this is a check of the consistency of the database of iOS, please wait for this freeze. I am still trying to find a better solution.
2.78 21/09/2025
- New status: Buoy and dry dock
- You can now have AI-generated daily totals first fill in
- You can now also select odd time zones such as -9.5 or +5.75
- Button to remove the position in an entry more easily.
- Tracks in the map in the PDF can now also be coloured by status
- Possibility to hide moorings and anchors for the statistics in the iOS settings
- Custom NMEA data records continue to be processed even if a hit occurs
- Custom NMEA pitch can now be configured
- Czech translation
- Typo fixed
- New icons for the auxiliary tools
- In rare cases, invalid tank values could lead to a crash
2.77 22/06/2025
- In the GPX export the times are now always in UTC
- Translation errors adjusted (thanks to all reports)
- Map type (Standard, Sat, OSM, etc.) can all be used again
- The configuration for trim/slope via NMEA can now be opened
- Water temperature via NMEA in Fahrenheit is now recognised correctly
2.76 18/05/2025
New:
- Map optional as full page per day
- There is new additional NMEA support for battery voltage, engine hours, fuel tank capacity, water tank capacity, grey water tank capacity, air pressure, engine RPM, air temperature, heel (roll) and pitch (pitch) - requires iOS 16
Fixed:
- Exports (PDF, GPX, etc) with an individual date range without entries in this range no longer crash
- Corrected two typos and translations
- In the languages Finnish, Romanian and Norwegian the app could crash unexpectedly
2.75 04/04/2025
- Additional information (COG, SOG, TWS, TWD, AWD, AWS, water depth) is now also imported with a GPX import.
- Sync error correction: Processing maintenance entries and deleting images was not synchronized
2.74 17/12/2024
- Corrections to the Italian translation.
- Fixed a bug that in rare cases could lead to a crash when generating the PDF.
2.73 29/10/2024
This version fixes a bug that could lead to a direct crash when opening the app for some users (mainly users who had recently installed the app for the first time).
2.72 21/10/2024
New:
- Entries on the coordinates 0°N 0°E (e.g. because the NMEA does not yet provide any data) are now counted as entries without a position. This means that they no longer distort the statistics, the map display of the track or the PDF export.
Fixed bugs:
- Some translation corrections that have been sent to me by users.
- Safety checklist UI revised, and existing entries made editable.
- In addition, you can create an entry from the list that transfers all completed/uncompleted items to a logubch entry.
- When editing the free text field, longer sentences were scrolled down/up beyond the field, this is now fixed.
- App crashed when opening the sync menu without a working internet connection.
- Maximum tank levels are now defined per logbook and not generally in the whole app.
- All exports can now be created partially with a start and end date.
- Graphical adaptation to support the new iPhone and iPad models.
2.71 18/10/2024
New:
- Apple Weather is now also available as a weather provider.
Fixed:
- If you created entries by time and always set this to an even time (full hour, hh:15, hh:30 etc.), it could happen that no weather data and no geocoding could be loaded. This problem should now be solved.
2.70 06/06/2024
Fixed:
- If you have set your device to 12h format (AM/PM), the sync may not work.
New:
- Option in the iOS settings to permanently save the configuration in the app for the entries after course changes.
2.69 02/06/2024
Fixed:
- New link for support via Telegram
- When creating an automatic entry by time in a different time zone, entries were created every second.
- And as always a few translation errors corrected. Please keep reporting if you find something!
New:
- There is now the possibility to display the coordinates in an alternative format.
2.68 07/05/2024
Fixed:
- Barometer access possible again if you allow access to fitness data. (Necessary since iOS 17.4)
- Fixed a bug in the sync function that sometimes caused entries without weather data to be uploaded and distributed to other devices.
- Corrected translation errors
New:
- Sharing (for people without the app) of the track is now possible via the sync and does not expire after 30 days and can also be changed/deleted afterwards.
2.67 28/03/2024
Changes in this version:
- The Watch app now also displays longer text for the stored manoeuvres on the buttons.
- Translation errors have also been corrected
- NMEA filter for invalid RMC data records
- When duplicating an entry, the wrong time was set if a different time zone was stored in the entry
2.66 20/03/2024
Changes in this version
- Support for the new iPhone 15 models and iOS 17.
- In the settings, some buttons are no longer displaced when the display is narrow
- Added new support option via Threema Chat
- Support option via X (Twitter) removed, has never been used by anyone.
- Typo corrected
- Added several new translations
2.65 14/09/2023
Fixed:
- SearchBar on iPad no longer overlapping with buttons
- ScopeView in SearchBar shown before entering a search term
- Typo fixes
2.64 11/08/2023
New features, bug fixes and improvements:
- The last line in the PDF can now show both coordinates and location text on a single line when there are two separate lines
- Fixed an issue where, in certain configurations, text from the last column in the PDF was also printed on a separate page
- Reversed the order in which the track is rendered in the PDF, as otherwise each colour would be offset by one track segment relative to the map
- The PDF no longer displays just a single battery voltage value, but the minimum and maximum values for the day
- Typos corrected
more Version 2.88 14 Aug
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