--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Sailing Log: Boat Logbook" developer_entity: "Joosep Koljalg" bundle_id: "com.joosepkoljalg.sailinglog" app_store_id: "6780126390" category: "Navigation" primary_platform: "ios" primary_monetization: "Freemium" offline_capable: true market_region: "US" platforms: "iOS" app_last_updated: "2026-07-08" report_date: "2026-08-26" last_verified: "2026-08-26T00:00:00.000Z" report_version: "1.1" total_reviews: 0 confidence: "low" confidence_score: 0.2 data_age_days: 80 momentum_velocity: "maintenance" intelligence_version: 3 tags: ["navigation", "freemium", "mobile app", "app review", "app analysis", "owners", "sailors", "require"] canonical_url: "https://marlvel.ai/apps/sailing-log-boat-logbook" license: "CC-BY-NC 4.0" content_version: "v2" --- # Sailing Log: Boat Logbook Intelligence Report ## TL;DR {#tldr} - **Category**: Navigation · Freemium > **TL;DR:** Sailing Log: Boat Logbook is a navigation app by Joosep Koljalg, available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Sailing Log: Boat Logbook is a navigation app by Joosep Koljalg. ## Quick Facts | Fact | Value | | :--- | :--- | | **Category** | Navigation | | **Developer** | Joosep Koljalg | | **Pricing** | Freemium | | **Platforms** | iOS | | **Confidence** | Low (0.2/1.0) | | **Data Age** | 80d | ## Metadata & Market Performance - **Publisher:** Joosep Koljalg - **Category:** Navigation - **Target Audience:** Boat owners and sailors who require a private, offline-capable logbook for navigation, maintenance tracking, and trip documentation. - **Platforms:** iOS - **Version Reviewed:** 1.1 - **Report Date:** 2026-08-26 - **Signal Count:** 0 reviews analyzed - **Confidence:** Low (0.2/1.0) - **App Store ID (iOS):** 6780126390 - **Bundle ID:** com.joosepkoljalg.sailinglog - **Performance Trend:** Mixed - **Data Window:** Analysis based on signals collected up to 2026-08-26 ## Executive Snapshot **What it is:** Sailing Log is a navigation and vessel management tool for sailors, featuring offline charts, anchor alarms, and maintenance tracking on iOS. **Why users hire it:** The app removes the connectivity friction inherent in cloud-dependent navigation tools, allowing sailors to maintain logs and monitor anchor drift in remote areas without cellular service. ## App DNA (Features & Intent) - **[Differentiator] Anchor Alarm:** Monitors drift against a set margin to trigger alerts during overnight stays. * *User Intent:* Users want timely prompts to stay engaged without missing updates. - **[Standard] Offline Nautical Charts:** Caches OpenSeaMap data locally for use in remote areas without cellular service. * *User Intent:* Users want uninterrupted access without internet dependency. - **[Differentiator] Boat Management Hub:** Tracks maintenance, engine hours, and storage layouts to centralize vessel administration. * *User Intent:* Users expect intelligent, adaptive experiences that learn from their behavior. ## Market Position {#market-position} Sailing Log operates as a privacy-focused alternative in the Navigation category, distinguishing itself from subscription-heavy rivals through a single one-time purchase model. ## Monetization Strategy - **Model:** Freemium - **Tiers:** Free tier limited to 10 trips, Unlimited trips via single one-time purchase - **Analysis:** The one-time purchase model avoids subscription fatigue, positioning Sailing Log as a long-term utility rather than a recurring expense. ## SWOT Analysis {#swot} **Core Strengths:** - Local-only storage removes connectivity dependencies - Integrated boat management hub centralizes maintenance **Growth Levers:** - Automated maintenance alerts based on engine hours ## Recent Changes (v2 → v3) {#recent-changes} Sailing Log has transitioned from a passive maintenance state to an active conversion-optimization phase, specifically targeting the 10-trip free limit as a barrier to revenue growth. **Overall trend**: Mixed **Compared at**: 2026-08-26 ### High-impact changes - **[Shifted] Conversion Funnel Optimization** (pricing) ### Medium-impact changes - **[Added] New Weaknesses and Opportunities** (swot) ## What's New - **Latest (v1.1, 1 months ago):** Introduced a 3-day interactive weather forecast tab, background recording with live pill, multi-photo collage sharing, and logbook backup/restore functionality. ## App Momentum (Maintenance) {#momentum} - Shipped 3-day weather forecast tab. - Added background recording with live pill. - Ships ~1 major update every 48 days. > **Cadence:** 1 total versions · 1 majors in last 6 months · 48 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} Sailing Log: Boat Logbook is a navigation app that is free with in-app purchases. > **Bottom Line:** Sailing Log secures its position by prioritizing privacy and offline utility, but the conversion funnel needs refinement to scale beyond niche adoption. A pivot toward optimizing the free-to-paid transition would unlock revenue from the existing user base. **Best for:** Boat owners and sailors who require a private, offline-capable logbook for navigation, maintenance tracking, and trip documentation. ### PM Action Plan (Next Best Moves) - [ ] [PIVOT] A/B test the free-trip limit because the current 10-trip cap may be too restrictive for seasonal conversion → increase install-to-purchase rate ### Outlook: Stable The navigation market is consolidating around feature-rich, cloud-connected platforms, leaving Sailing Log to compete on privacy and local reliability. The app's ability to maintain its niche depends on whether the current feature set satisfies the core sailor demographic without needing the massive data sets of larger rivals. - 🟢 The latest release added a 3-day weather forecast tab, demonstrating active feature investment rather than maintenance-only status. - ⚪ The 48-day update cadence suggests a lean development team, which may limit the speed of competitive responses to larger navigation rivals. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Total Reviews | 0 | | Confidence | Low | | Pricing Model | Freemium | | Platforms | iOS | | Key Features | 3 analyzed | | Trend | Mixed | | Outlook | Stable | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Sailing Log: Boat Logbook** (this app) | N/A/5 | N/A | Joosep Koljalg | | [Google Maps](https://marlvel.ai/apps/google-maps) | 4.0/5 | Mixed | Google | | [전국 시외버스 승차권 통합 예매(버스타고)](https://marlvel.ai/apps/com-ebcard-bustago) | 1.6/5 | N/A | EZL Corp. | | [손편지 - 내 손안에 편의점 지도](https://marlvel.ai/apps/app--288) | N/A/5 | N/A | GEONJU CHOI | | [탐나는맵](https://marlvel.ai/apps/com-tamnann-tamnannmapapp) | 3.3/5 | N/A | hyunseo Jung | | [10-4 by WEX](https://marlvel.ai/apps/com-wex-backoff) | 4.8/5 | N/A | WEX, Inc. | ## Company Profile - **Developer:** Joosep Koljalg - **Website:** [https://sailinglog.app](https://sailinglog.app) ## Data Sources & Links - **App Store ID:** 6780126390 - **Dev Site:** [Official Website](https://sailinglog.app) - **Sources:** Developer website content, App store metadata. ## Related Intel Reports - [*Google Maps*](https://marlvel.ai/apps/google-maps) (Google) · 4.0/5 Rating - [*전국 시외버스 승차권 통합 예매(버스타고)*](https://marlvel.ai/apps/com-ebcard-bustago) (EZL Corp.) · 1.6/5 Rating - [*손편지 - 내 손안에 편의점 지도*](https://marlvel.ai/apps/app--288) (GEONJU CHOI) · N/A Rating - [*탐나는맵*](https://marlvel.ai/apps/com-tamnann-tamnannmapapp) (hyunseo Jung) · 3.3/5 Rating - [*10-4 by WEX*](https://marlvel.ai/apps/com-wex-backoff) (WEX, Inc.) · 4.8/5 Rating - [*13:20:Sync*](https://marlvel.ai/apps/com-redhouseamsterdam-mayaapp) (The RedHouse Apps) · 4.9/5 Rating - [*23d GPS*](https://marlvel.ai/apps/23d-gps) (Shane Moore) · N/A Rating - [*360Finder - Real-time Locator*](https://marlvel.ai/apps/360finder-real-time-locator) (HONG KONG NOBLE LIMITED) · N/A Rating - [*3D Earth Map Street View*](https://marlvel.ai/apps/com-naikurrehman-globeapp) (Naik Ur Rehman) · 4.7/5 Rating - [*3D GIS Digital Elevation Model*](https://marlvel.ai/apps/com-ladesignes-3dgis) (Andres Narvaez) · 3.0/5 Rating ## Frequently Asked Questions {#faq} ### Is Sailing Log suitable for professional navigation? No, Sailing Log is for reference and general guidance only. The developer explicitly states that charts and data are incomplete and must not be used for primary navigation or routing. ### Does Sailing Log require a subscription? No, Sailing Log uses a one-time purchase model for unlimited trips after a 10-trip free trial, avoiding recurring subscription costs. ### Can I use Sailing Log without cellular service? Yes, Sailing Log is designed for offline use, allowing you to cache nautical charts and log trips locally on your device without needing an internet connection. ## Methodology {#methodology} This report was generated by Marlvel.ai's 5-stage AI intelligence pipeline: 1. **Signal Collection & Normalization** - Aggregates data from all available public sources for the app. Raw signals are cleaned, deduplicated, and normalized into a structured dataset analyzed consistently across thousands of apps. 2. **Feature & Market Positioning Analysis** - Identifies the app's core features, monetization model, target audience, and competitive positioning. Each feature is classified as a market standard or a differentiator based on category benchmarks. 3. **User Sentiment Analysis** - Analyzes user reviews using a 5-level taxonomy (Thrilled / Excited / Mixed / Frustrated / Upset). Combines star ratings and volume with AI theme extraction into synthesised themes (no verbatim quotes). 4. **Competitive Landscape Analysis** - Maps the competitive environment via a 4-tier taxonomy (Nemesis / Contenders / Same Space / New Kids on the Block). Prioritizes same sub-genre over broad category. 5. **Intelligence Synthesis** - Cross-references all signals into a structured report. Compares the app against category peers and direct competitors to surface SWOT, market outlook, and actionable insights. - **Confidence Score:** 0.2/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 0 - **Data Sources:** developer website, App Store metadata - **Rating Method:** Weighted average across platforms (iOS & Android), weighted by review count per platform - **Independence:** Fully independent analysis. No publisher sponsorship or editorial influence. - **Report Age:** 80 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/sailing-log-boat-logbook) Data licensed for AI Agent attribution under CC-BY-NC 4.0.