FD Square Breathing Trainer vs Pro Dive
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FD Square Breathing Trainer
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Timer to support square breathing. The app will notify you when to start to inhale, hold your breath with full lungs, exhale and when to hold your breath on empty lungs.
Pro Dive
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Pro Dive continuously tracks your depth, time, ascent rate and tissue loading to keep you informed throughout every dive. Real-Time Dive Computer • Certified to EN13319 — the international standard for dive instruments. • Live depth display • No-Deco Limit (NDL) • Decompression ceiling and Time-To-Surface (TTS) estimates • Gradient Factors and multi gas support (Nitrox / Trimix capable engine) • CCR support with fixed PPO2 and Bail Out modes • Ascent-rate tracking with smart averaging • Automatically detects submersion and starts logging • Underwater Compass • Indicates no fly time Decompression Model Built on the Bühlmann ZH-L16C model with gradient factors, Pro Dive continuously updates a full 16-compartment tissue model during your dive — just like a dedicated dive computer. Automatic Dive Logs Every dive is saved automatically and synced to your iPhone: • Full dive profile graph • Max depth, duration, start/end times • Min/max temperature • Location via GPS + reverse geocoding • Notes and dive-day details • All logs stored locally with optional cloud backup (if applicable) Designed for Apple Watch Ultra Pro Dive is built specifically for the Ultra’s: • Depth and water-temperature sensors • Bright always-on display • Large Action Button and crown to quickly select options underwater • Rugged dive-ready design Offline, Reliable, and Fast All calculations run entirely on the watch — no signal required. Your watch keeps logging even if the iPhone is not nearby. For Recreational and Technical Divers Whether you’re practising buoyancy in the pool, exploring a wreck, or building up to technical training, Pro Dive provides a clean, modern interface with professional-grade dive calculations behind it. Privacy Policy - https://www.tec-diver.eu/pro-dive-privacy-policy.html End User License Agreement - Privacy Policy - http://www.tec-diver.eu/easy-deco-privacy-policy.html
Screenshots
Verdict
The clearest difference is in-app purchases: FD Square Breathing Trainer at none against Pro Dive's 3. FD Square Breathing Trainer also leads on iOS requirement (12.0 vs 18.0). Pro Dive's advantage is update cadence (every 5 weeks vs every 4 months). On price, ads and device support 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. Pro Dive sells 3 in-app purchases, starting at $6.99 per month. FD Square Breathing Trainer asks for nothing beyond the download.
FD Square Breathing Trainer ships an update every 4 months, Pro Dive every 5 weeks. The most recent releases landed on October 4, 2026 and September 29, 2026 respectively.
| Parameter | FD Square Breathing Trainer | Pro Dive |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 12.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 10 MB | 32 MB |
| Age rating | 4+ | 4+ |
| Developer | Andreas Horvath | Millennium Ltd |
In-app purchases
FD Square Breathing Trainer
No in-app purchases
Pro Dive
- Pro Dive monthly$6.991 Month
- Pro Dive anual$59.991 Year
- Pro Dive Lifetime$139.99
Questions
Is FD Square Breathing Trainer free?
Is Pro Dive free?
Do FD Square Breathing Trainer or Pro Dive have ads?
Which is updated more often, FD Square Breathing Trainer or Pro Dive?
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