BigFiveGym vs ZenDepth
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
BigFiveGym
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Download the BigFIVE App today to plan and schedule your classes! From this mobile App, you can view class schedules and sign up for classes as well as view the studio’s location. Check our new offers and search our membership and packages. Optimize your time and maximize the convenience of signing up for classes from your device! Download this App today!
ZenDepth
Enhance your breath-holding capabilities with personalized training plans and guided exercises. Track progress, unlock techniques, and compete with friends in a visually immersive underwater environment.
- Adaptive training plans (CO2 & O2 tables)
- Guided stretching exercises
- 20+ breath-hold techniques
- Gamified milestones and badges
- Social leaderboards for friends
- Immersive underwater aesthetic
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Master your breath. Extend your limits. ZenDepth is a personalized apnea training app built for freedivers, spearfishers, surfers, and meditators who want to go further underwater. Set your baseline. Get a 12-session adaptive plan calibrated to your personal best. Track your progress through phases as your hold times grow. SMART TRAINING PLANS CO2 tables build your tolerance to high carbon dioxide. O2 tables train your body to use oxygen more efficiently. Every plan adapts to your current level and improves with you. GUIDED STRETCHING Expand your lung capacity and thoracic mobility with five science-backed stretching exercises — guided in real time with live cues. UNLOCK TECHNIQUES Master 20 breath-hold techniques progressively as you train — from Recovery Breathing to advanced Breath Packing. GAMIFIED MILESTONES Earn badges, conquer phases, and watch your guided streak grow. Training feels like progress, not a grind. TRAIN WITH FRIENDS Add friends by username and see how your personal bests stack up. A private leaderboard built for the freediving community. BEAUTIFUL BY DESIGN An underwater aesthetic that makes every session feel like a dive. Animated backgrounds, glass-morphic UI, and haptic feedback designed for focus and flow. ZenDepth is free to start. Unlock all training phases with a premium subscription after completing the first training phase. Terms of Use: https://zendepth.app/terms.html
Screenshots
Verdict
The clearest difference is in-app purchases: BigFiveGym at none against ZenDepth's 3. BigFiveGym also leads on iOS requirement (14.0 vs 18.0). ZenDepth's advantage is ads (none vs shown) and update cadence (daily vs monthly). On price 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. ZenDepth sells 3 in-app purchases, starting at $3.99 per month. BigFiveGym asks for nothing beyond the download.
BigFiveGym ships an update monthly, ZenDepth daily. The most recent releases landed on September 29, 2026 and October 7, 2026 respectively.
| Parameter | BigFiveGym | ZenDepth |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (4 ratings) — better |
| Number of ratings | — | 4 — better |
| Update frequency | Monthly | Daily — better |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Monetization | — | Freemium |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 14.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 118 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | NIKOLAOU - TSOVGKAN O.E | Christos Voutsaras |
In-app purchases
BigFiveGym
No in-app purchases
ZenDepth
- Monthly$3.991 Month
- Annually$19.991 Year
- Lifetime$49.99
Questions
Is BigFiveGym free?
Is ZenDepth free?
Do BigFiveGym or ZenDepth have ads?
Which is updated more often, BigFiveGym or ZenDepth?
Other comparisons
