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56
BU Score
Solid

Logbook

4.4 ✍️ Editor
✍️ BU Analytics Review

Logbook is an iOS app from Florian Kriesche in the Productivity category, currently rated 4.4★ across 21 ratings. Initial signal reads as largely positive sentiment, users highlighting consistency and feature depth.

Our BU Score puts it at 56Solid (established niche player). For a Productivity app, that means established niche player.

Track changes month-over-month in the Performance section below — live snapshot history and revenue forecast included.

📊 Performance Tracking LIVE

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idle
0%
Rating
Reviews
Forecast Revenue / mo
Snapshots tracked
0
since first record
Range:

💰 Forecast Revenue / mo

MODEL
Revenue forecast computed from BU's 234 trigger model on each snapshot. Calibrated against ground-truth from 58 verified-revenue apps.
🔬Forecast Breakdown — Why This Estimate?Top 6 of 6 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
Paid app ($0.00)METRIC
+$2,800
Mature app (13y old)METRIC
+$1,500
Multilingual (19 languages)METRIC
+$1,500
highly recommendREVIEW
+$1,400
Good rating (4.4★)METRIC
+$800
Pre-traction phase (21 ratings)METRIC
−$300
METRIC = structural app data · REVIEW = mined from user reviews · ✓ VERIFIED = Stripe-verified anchor (TrustMRR)

📈 Reviews Growth

LIVE
Cumulative review count from first BU snapshot. Each point = a tracked update.

⭐ Rating Trend

LIVE
Average rating evolution. Updates with each new review batch.

🗓️ Snapshot Timeline

HISTORY
Each bar shows a tracked update and the metric delta from the previous snapshot.
App Specs
🔐 Own this app? Claim & verify MRR →
💾 53 MB🔞 4+📱 iOS 16.6+🔖 v2.85🔄 updated 2w ago🌐 HR, CS, DA, NL, EN +14📂 Productivity💰 Paid🚀 Launched 2012 (13y old)

📝 About this app

The Logbook App is an automated electronic logbook for your iPhone or iPad, you can add entries manually or let your vessel's log fill in automatically in the background. This logbook app was developed by sailors for sailors, but also powerboaters 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 force
- Degree of cloudiness
- Air temperature
- Water temperature
- Amount of precipitation
- Significant wave height
# As well as other data fields per logbook entry which 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 pictures to entries
# Sunrise and sunset times and nautical dawn and dusk times.
# Measure current heel and add to logbook entry
# Display GPS accuracy
# Display distance traveled in color (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 program
# 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 full day of sailing can be done with it, nevertheless don't forget the 12V charging cable ;-)

SUPPORT

This app is chargeable, so I take it with the support also very seriously! Please refrain from negative reviews without at least contacting me first. I was able to solve every problem from buyers who contacted me. I have also implemented many feature requests from buyers and am very grateful for constructive feedback! You can reach me like this:
* reach me via email which is visible via the support URL here in the store
* via Discord or Telegram, linked in the app here: Settings > Support
* send a message from within the app using the menu item: Settings > Support

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

🆕 What's New · v2.85

New:
- Wind arrows now step up in 5-knot increments instead of Beaufort scales.
- When you make several 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 light text in Dark Mode.
- You can no longer enter more than one decimal point when logging engine hours.
- In the PDF, text in the last column no longer shifts when you set a long label to wrap over two lines.
- Stability improvements in 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 pre-filled in the first logbook entry if 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.

Profile & Insights

Everything we know — and don't — about this app and its company.

Identification

App name
Logbook
Developer
Florian Kriesche
Bundle ID
de.floq.Logbook
App Store URL
Open in App Store
Category
Productivity
Content rating
4+
Languages
HR, CS, DA, NL, EN, FI, FR, DE, IT, NB, PL, PT, RO, RU, ZH, SK, ES, SV, UK

Company

Website
logbook-app.com
Tagline
Introducing Logbook for your iPhone...
Description
Logbook App is an automated electronic logbook on your iPhone. Logbook App is designed by sailors for sailors, a powerboat owner will find it worthwhile as well.
Founded
Not found
HQ / Address
Not found
Employees
Not found
Logo
Not found

Revenue

Verified revenue / mo
Not found
AI revenue estimate / mo
Not found
AI annual estimate
Not found
ML model estimate / mo
$8.1K/mo
Top-grossing rank
Outside top 100 in US Productivity
All-time revenue
Not found
Pricing
Not found

Founder

Name
Not found
X / Twitter
Not found
LinkedIn
Not found
GitHub
Not found
X followers
Not found
Public statements
Not found

Funding

Total raised
Not found
Last round
Not found
Investors
Not found
Crunchbase
Not found
AngelList
Not found

Press & Links

Articles found
Not found
Listed on
Not found
Blog
Not found
Press / News
Not found

Contacts & Socials

Socials
Not found
Email
Not found
Phone
Not found
Contact page
https://logbook-app.com/en/ios/support/faq/
About page
Not found
📈Ratings growth21 ratings+2000% lifetimeShow 3-year history estimate ▾Feb 2015Jul 2024May 2026
Tracked (10 weeks) Pre-tracking estimate (37 weeks) · model-based, ±5% noise · anchored to release date and current value
🌍Geographic ReachNot ranked
This app is currently outside the top 100 grossing in all 9 countries we monitor (US, UK, DE, FR, JP, CA, AU, BR, IN). Niche or new apps often launch this way — popularity rankings appear once daily revenue clears the regional threshold.
Profile is built from iTunes Lookup + developer site scrape + ML revenue model. Empty fields show "Not found" — additional sources (Crunchbase, X, IndieHackers, Acquire.com) coming.
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