Comparison

Apnea Trainer vs Stealth Training System

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Apnea Trainer

Enhance your breath-holding abilities for freediving, spearfishing, and other water sports. This app offers personalized training tables, progress tracking, and guides to help you improve CO2 tolerance, oxygen utilization, and mental preparedness underwater.

Highlights
  • Personalized training tables
  • CO2 and O2 tolerance training
  • Apnea walks training
  • Visual progress tracking
  • Training log
  • Home screen widgets
  • Detailed guides
Features
Read full description

### Dive longer with Nea - Your ultimate apnea trainer Unlock the full potential of your freediving experience with Nea, designed to help you enhance your breath-holding abilities and extend your time underwater. Whether you're a beginner or a seasoned diver, our app provides tailored training that adapts to your level and goals. If you are a surfer, spearfisher or practice any other sport under water, Nea will also help you to increase your max breath-hold and feel more comfortable under stressful situations under water. ### Nea helps with - Improve tolerance to CO2 - Effective use of oxygen - Delay urge to breathe - Withstand lactic acid built up - Increase lung capacity - Mental aspects of freediving and holding your breath ### Training - Personalised training based on your level - Static apnea tables - Apnea walks tables - Relaxation, CO2 and O2 tables - Max breath-hold test ### Key Features - Customizable training tables: choose from CO2 tolerance, O2 enhancement, or combined CO2 and O2 apnea walks to push your limits safely and effectively. - Relaxation tables to delay the urge to breathe - Visual progress tracking: visualize your improvement with intuitive charts that track your breath-holding performance over time. - Training log: log your feelings and how your training goes to understand your body and progress better - Home Screen widgets: stay motivated with Home Screen widgets that display your latest training activity and progress updates right on your Home Screen. - Guides: benefit from detailed guides that explain each training technique and how to use the app effectively to maximize your results. - Reminders: get reminders to your workout sessions and stay consistent ======================= The free version of Nea includes static CO2 and O2 training, as well as CO2 and O2 apnea walks tables personalised to your max breath-hold level. Training history is limited. If you purchase Nea PRO, the payment will be charged to your iTunes account. If you purchase a monthly or yearly subscription, your account will automatically be charged for renewal within 24 hours prior to the end of the current subscription period unless you disable auto-renew. You can turn off auto-renewal at any time by going to your Account Settings on the App Store after purchase. ======================= Terms of Service: https://keinois.com/nea/terms-of-service Privacy Policy: https://keinois.com/nea/privacy-policy

About

Stealth Training System

Features
Read full description

Stealth Training System (STS) puts your training plan in your pocket. Follow your coach-built programme, log every set, and track your progress, online or off. TODAY'S SESSION, ALWAYS READY See exactly what to do today: sets, reps, weights, times and RPE. Tick it off as you go. LOG EVERYTHING, FAST A quick, offline-first logger for every set, WOD and session. Rest and workout timers keep you moving, and everything syncs when you're back online. TRACK YOUR BODY Log your weight, body-fat, measurements and progress photos, and see how you're changing over time. SEE YOUR PROGRESS Personal bests, streaks, weekly recaps and per-movement trends turn your training into a story you can actually see. TRAIN WITH YOUR COACH Your coach builds and adjusts your plan and can see how you're getting on, so your programme stays right for you. Whether you train in a gym or at home, STS keeps working, even offline, so you can log anywhere. Training plans are managed at assassingoods.com.

Screenshots

Apnea Trainer4 screens
Stealth Training System4 screens

Verdict

The call

The clearest difference is in-app purchases: Stealth Training System at none against Apnea Trainer's 11. Stealth Training System also leads on iOS requirement (15.0 vs 26.0). On price, update cadence, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Apnea Trainer sells 11 in-app purchases, starting at $1.99 per 7 days. Stealth Training System asks for nothing beyond the download.

UpkeepUpdate frequency

Apnea Trainer ships an update every 3 weeks, Stealth Training System fortnightly. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 8 level
Apnea Trainer versus Stealth Training System: the parameters behind the verdict, then further details
ParameterApnea TrainerStealth Training System
PriceFreeFree
Rating4.9 (13 ratings) — better—
Positive reviews90.0% of reviews—
Number of ratings13 — better—
Update frequencyEvery 3 weeksFortnightly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemium—
DevicesiPhone, iPadiPhone, iPod
Requires iOS26.015.0 — better
Further details — not scored
Size54 MB4 MB
Age rating4+4+
Developerkeinois OUMichael Walters

In-app purchases

11 purchases

Apnea Trainer

Subscriptions9
  • Nea PRO (Weekly)$1.997 Days
  • Nea PRO (Weekly)3 Days trial$2.997 Days
  • Nea PRO (Monthly)7 Days trial$3.991 Month
Show 6 more
  • Nea PRO (monthly)7 Days trial$4.991 Month
  • Nea PRO (Monthly)7 Days trial$5.991 Month
  • Nea PRO (Annual)$11.991 Year
  • Nea PRO (Annual)7 Days trial$11.991 Year
  • Nea PRO (Annual)7 Days trial$14.991 Year
  • Nea PRO (Annual)7 Days trial$17.991 Year
One-time2
  • Nea PRO (Lifetime)$34.99
  • Nea PRO (Lifetime)$49.99
None

Stealth Training System

No in-app purchases

Questions

Is Apnea Trainer free?
Apnea Trainer is free to download, with in-app purchases available.
Is Stealth Training System free?
Stealth Training System is free to download, with no in-app purchases.
Do Apnea Trainer or Stealth Training System have ads?
Neither Apnea Trainer nor Stealth Training System shows ads.
Which is updated more often, Apnea Trainer or Stealth Training System?
Apnea Trainer ships an update every 3 weeks, and Stealth Training System fortnightly. Most recently, Apnea Trainer was updated on October 30, 2026 and Stealth Training System on October 31, 2026.

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