Halcyon Dive Systems vs Active Log
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Halcyon Dive Systems
This app helps divers log, track, and share their underwater experiences. It offers integration with dive computers, personalized settings, and a community forum for connecting with other divers.
- Symbios integration for dive computer settings
- Detailed dive logging and progress tracking
- Social logbook for sharing dive stories
- Connect with a global diving community
- Personalized dive tips and advice
- Exclusive benefits for Halcyon owners
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Explore without limits: Your Ultimate Diving App Dive smarter and safer with the Halcyon App. Enjoy this powerful tool for logging, tracking, and sharing all your diving experiences while experiencing unprecedented integration with your Halcyon computer. With the Haclyon app you have full control over all computer settings, allowing the creation of profiles that include tailored settings and gases, pushed to the computer with the click of a button. You can also enjoy a full-featured "dry-diving" mode to explore all the unique features of our Symbios-connected products. From beginners to seasoned pros, the Halcyon App empowers you to explore the underwater world with confidence, share with our vibrant community, and track your diving progress. Key Features: Symbios Integration: Sync with Symbios-enabled devices, including the Handset, HUD, Rebreather and more. Manage your settings, create saved profiles with tailored settings and gases, track dive profiles, and access advanced metrics. Log Your Dives: Keep a detailed record of your dives. Monitor your progress over time and relive your diving adventures. Social Logbook: Share your dive stories, photos, and achievements with divers worldwide. Stay motivated and inspire others along the way. Diving Community: Connect with divers at any level. Share tips, discover new dive spots, and stay in the loop with the latest dive trends. Personalized Dive Tips: Get advice tailored to your diving experience with helpful tips and tricks, no matter your skill level. Halcyon Owner Benefits: Enjoy exclusive perks if you're a Halcyon owner—priority support, extended warranties, and special offers to get the most out of your gear. Why Choose Halcyon App? The Halcyon App isn’t just for logging and tracking—it’s your gateway to a richer diving experience. With cutting-edge technology, a thriving community, and personalized insights, the Halcyon App helps you dive smarter, stay connected, and explore like never before. Whether you're diving at a technical site or simply enjoying a recreational dive, the app ensures every dive is memorable, safe, and exciting. Stay Connected, Stay Inspired Join a passionate diving community where you can share experiences, connect with fellow divers, and keep up with the latest Halcyon innovations. The Future of Diving Is Here With Symbios Ecosystem integration, the Halcyon App lets you customize and track your gear, log dives, and connect with divers worldwide. Experience the underwater world with the latest tools, all from your phone. For Divers at Every Stage Whether you're just starting out or have hundreds of dives under your belt, the Halcyon App helps you track your dives, manage your gear, and stay in touch with the diving community. Download Halcyon App Today Join the next generation of divers—download Halcyon App and start exploring without limits.
Active Log
This app serves as a comprehensive dive logbook for scuba and freediving enthusiasts. It allows users to track progress, plan dives, import data from dive computers and existing files, and store important documents. It also includes safety calculators and works offline.
- Dive computer data import
- Log file import (SSRF, .FIT)
- Dive planning and profile tracking
- Document and certification storage
- Offline functionality
- Safety calculators (MOD, EAD, ppO2)
- Cloud sync across devices
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Active Log is an all-in-one app for scuba diving, technical diving, freediving, swimming and conditioning. Log and analyse your dives, import dives from supported dive computers, plan recreational and technical dives, train for freediving, create swimming workouts and improve your strength, endurance and conditioning. Whether you're a recreational diver, technical diver, freediver or swimmer, Active Log brings your activities, training and progress together in one place. DIVE LOGBOOK • Log recreational and technical scuba dives • Add dive details, locations, buddies, equipment, notes and photos • View your dive history and statistics • Track your progress and personal records • Store certifications, insurance, medical documents and assessments • Keep your diving information organised in one place DIVE COMPUTER & IMPORT Download dives directly from supported dive computers, including Shearwater, Suunto, Scubapro, Apeks and more. Import existing dive data from supported formats such as Subsurface/SSRF and FIT, or export and import dives in JSON format. Spend less time entering dive information manually and more time exploring your dives. DIVE PLANNER Plan your next dive before entering the water. Create recreational dive plans and review your dive profile, depth, time, gas requirements, decompression and expected run time. Keep your dive plans together with your dive logbook so you can plan, dive and review in one app. TECHDIVE Advanced planning and calculation tools for trained technical divers: • Decompression and multi-gas dive planning • Gas requirements and reserves • Gas Analyzer • Nitrox and Trimix blending • Recommended Gas Mix and Top-up Tank • MOD, EAD, END and PPO₂ calculations Active Log gives technical divers practical tools for preparing and analysing more complex dives. FREEDIVING Freediving is more than holding your breath. Train your breath, body and mind with: • CO₂ and O₂ tables • Custom apnea training • Dry training • Stretching and mobility • Mindset and mental preparation • Training history and progress tracking Build your freediving training around breathing, relaxation, physical preparation and mental performance. SWIMMING Train smarter in the pool or open water. • Create structured swimming workouts • Organise workouts into warm-up, main sets, drills, recovery and cooldown • Train freestyle, backstroke, breaststroke, butterfly and more • Track distance, sets, intensity and rest • Record your swims • Follow your swimming progress over time Whether you're swimming for fitness, technique or performance, Active Log helps you structure your training and keep improving. CONDITIONING Improve the fitness that supports your diving, freediving and swimming. Create conditioning workouts focused on: • Strength • Endurance • Mobility • General fitness Combine water training with physical conditioning to become stronger, fitter and better prepared for your activities. TRACK YOUR PROGRESS Active Log brings your diving, freediving, swimming and training history together so you can follow your performance, statistics, goals and personal progress over time. YOUR ACTIVITIES, ANYWHERE Active Log works offline, so important information remains available at the dive site, on the boat, at the pool or while travelling. Your data can also be securely stored in the cloud and accessed across multiple devices. DIVE. FREEDIVE. SWIM. TRAIN. Log your adventures. Plan what comes next. Train with purpose. Track your progress. Active Log — your water sports, one app. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: Halcyon Dive Systems at none against Active Log's 4. Halcyon Dive Systems also leads on ratings volume (8 vs 1). Active Log's advantage is update cadence (every 3 days vs every 2 weeks) and device support (3 vs 1). On price, rating, ads and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Active Log sells 4 in-app purchases, starting at $4.99 per year. Halcyon Dive Systems asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for Halcyon Dive Systems against 5.0 for Active Log. That said, the two scores are not equally well evidenced: Halcyon Dive Systems has 8 ratings behind it against 1, so its average is the more settled of the two.
Halcyon Dive Systems ships an update every 2 weeks, Active Log every 3 days. The most recent releases landed on October 4, 2026 and October 10, 2026 respectively.
| Parameter | Halcyon Dive Systems | Active Log |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (8 ratings) | 5.0 (1 ratings) |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 8 — better | 1 |
| Update frequency | Every 2 weeks | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported — better | Free with in-app purchases |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 15.6 — better |
| Further details — not scored | ||
| Size | 159 MB | 75 MB |
| Age rating | 4+ | 4+ |
| Developer | Halcyon Dive Systems | Duong Do |
Customer experience
Halcyon Dive Systems
Active Log
In-app purchases
Halcyon Dive Systems
No in-app purchases
Active Log
- Freediving module (yearly)7 Days trial$4.991 Year
- TechDive module (yearly)7 Days trial$4.991 Year
- Swimming module (yearly)7 Days trial$4.991 Year
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- Diving module (yearly)7 Days trial$9.991 Year
Questions
Is Halcyon Dive Systems free?
Is Active Log free?
Which has better reviews, Halcyon Dive Systems or Active Log?
Do Halcyon Dive Systems or Active Log have ads?
Which is updated more often, Halcyon Dive Systems or Active Log?
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