OpenSwim vs Cardio Log
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
OpenSwim
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OpenSwim is your AI-powered open water swimming companion. Whether you're a skins swimmer braving the Atlantic, a wetsuit triathlete scouting your next crossing, or a beginner checking if conditions are safe. OpenSwim gives you everything you need before you hit the water. Real-time ocean conditions Get hyperlocal forecasts for your favourite beaches โ wave height, swell period, water temperature, wind, UV, and current โ all interpreted specifically for swimmers, not surfers or sailors. AI swim coach Ask anything about open water swimming. Get personalised coaching advice, safety guidance, cold water acclimatisation tips, and training plans built around ocean conditions. Epic Crossings Plan legendary open water routes with AI-generated course intelligence, marine activity reports, and safety scoring. Cold Water & Safety tools Pre-swim checklists, cold water immersion guides with duration ranges by experience level, and rip current awareness โ built by swimmers, for swimmers. AI Vision Beach Analysis Upload a photo of any beach and get an instant AI safety briefing with hazard identification. Swim Logger & Analytics Log every ocean swim, track your progress, and review your history over time. OpenSwim is free to use.
Cardio Log
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The workout is done. Open CardioLog, tap the sport, set the minutes, rate the effort โ logged in ten seconds. That is the whole job: a dead-simple cardio journal for people who run, cycle, swim, row or hit the elliptical and just want the work written down. No GPS to babysit. No pace charts to decode. No feed of strangers going faster than you. CardioLog measures nothing โ it remembers. You did the session; the app keeps the receipt, adds it to your week and shows how close you are to the 150 minutes of aerobic activity the WHO recommends for adults. WHAT YOU GET โข A session logged before your breathing settles โ sport, minutes, effort, done โข Your week at a glance: 112 of 150 minutes on Thursday tells you exactly what the weekend owes โข A streak counter that makes day 14 feel too expensive to break โข Your training mix laid bare โ when "I swim sometimes" turns out to be 2 swims in 30 sessions, you will know โข A monthly summary card ready to share: sessions, minutes, active weeks, longest session and your activity mix โข Edit any entry, add notes ("hill repeats", "new shoes"), and export your entire log as CSV anytime PERFECT FOR โข Runners and cyclists who want a diary of the work, not another GPS trace โข Swimmers, rowers and elliptical regulars whose sports GPS apps never handled well anyway โข Anyone chasing the WHO 150-minute week, one logged session at a time โข Lapsed athletes rebuilding the habit who need a streak more than a coach WHY NOT JUST A GPS TRACKER? Trackers record where you went. A journal records that you went. If maps and splits kept you consistent, you would be consistent already. CardioLog strips the workout down to the three facts that build a habit โ what, how long, how hard โ and turns them into a week you can see and a streak you will not want to lose. PRIVATE BY DEFAULT Your log lives on your device. No account, no location, no third-party SDKs. A daily reminder at the hour you choose is the only time CardioLog speaks first. It is an activity journal, not a medical device โ it measures nothing and assesses nothing. FULL ACCESS CardioLog Pro unlocks the complete experience: the daily volume chart, your training mix by sport, streak tracking and the shareable monthly summary. Choose a Weekly or Yearly subscription, or a one-time Lifetime purchase. Tonight, after the run โ log it. That is how streaks start. SUBSCRIPTION TERMS Weekly and Yearly are auto-renewing subscriptions. Payment is charged to your Apple Account at confirmation of purchase. The subscription renews automatically unless it is cancelled at least 24 hours before the end of the current period, and your account is charged for renewal within 24 hours before the end of that period. You can manage or cancel your subscription in Settings > Apple Account > Subscriptions after purchase. Lifetime is a one-time purchase and does not renew. Terms of Use: https://leanstudio.asia/terms-of-use Privacy Policy: https://leanstudio.asia/privacy-policy Support: support@leanstudio.asia
Screenshots
Verdict
The clearest difference is in-app purchases: OpenSwim at none against Cardio Log's 3. OpenSwim also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price and ads there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Cardio Log sells 3 in-app purchases, starting at $3.99 per 7 days. OpenSwim asks for nothing beyond the download.
| Parameter | OpenSwim | Cardio Log |
|---|---|---|
| Price | Free | Free |
| Update frequency | โ | Every 4 months |
| Ads | No | No |
| In-app purchases | No โ better | Yes |
| Devices | iPhone, iPad, iPod โ better | iPhone |
| Requires iOS | 15.0 โ better | 17.0 |
| Further details โ not scored | ||
| Size | 13 MB | 3 MB |
| Age rating | 17+ | 4+ |
| Developer | Jaco Rossouw | LEAN ASIA CO., LTD |
In-app purchases
OpenSwim
No in-app purchases
Cardio Log
- Activity Minutes Weekly$3.997 Days
- Run Tracker Yearly$19.991 Year
- Cycling Lifetime$39.99








