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Building a dry training tool for self-taught freedivers — looking for feedback

Thread Status: Hello , There was no answer in this thread for more than 90 days.
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DryDive

New Member
Jun 3, 2026
2
0
1
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Hey everyone,
Wanted to introduce myself properly. I'm a freediver who trains mostly solo — no club nearby, no regular buddy for pool sessions. Like a lot of people here, I picked up freediving through spearfishing and got hooked on the breath-hold side of things.
One thing that always frustrated me was the gap between sessions. I'd do a pool or ocean session, feel great, then spend the next week doing… not much. The CO2/O2 table apps out there are fine for what they are, but they're basically glorified stopwatches. No technique guidance, no progression, nothing that connects the physiology to the actual training.
So I started building something for myself — a dry training companion that combines the theory side (CO2 tolerance, mammalian dive reflex, why hyperventilation is dangerous) with actual structured training. Not just tables, but dynamic drills you can do anywhere: apnea walks, breath-hold bodyweight exercises, diaphragm and rib cage mobility work, plus the classic CO2/O2 table training with proper guidance.
It's called DryDive and it's a free web app — no download needed, works on your phone. The idea is that if you only get in the water once or twice a week, you can still make meaningful progress on dry land between sessions.
I'd genuinely love feedback from this community. You all have way more collective experience than I do, and I want to make sure this is actually useful rather than just another app that collects dust.
A few things I'm specifically curious about:
  • What does your dry training routine actually look like between water sessions?
  • Are there drills or exercises you swear by that most apps/programs miss?
  • For the spearos here — do you do any breath-hold specific training on land, or is it mostly just time in the water?
If you want to check it out: drydive.polsia.app
Happy to answer any questions, and genuinely open to criticism. Trying to build something that actually serves this community, not just look good on a screen.
Dive safe.
 
Hey everyone,
Wanted to introduce myself properly. I'm a freediver who trains mostly solo — no club nearby, no regular buddy for pool sessions. Like a lot of people here, I picked up freediving through spearfishing and got hooked on the breath-hold side of things.
One thing that always frustrated me was the gap between sessions. I'd do a pool or ocean session, feel great, then spend the next week doing… not much. The CO2/O2 table apps out there are fine for what they are, but they're basically glorified stopwatches. No technique guidance, no progression, nothing that connects the physiology to the actual training.
So I started building something for myself — a dry training companion that combines the theory side (CO2 tolerance, mammalian dive reflex, why hyperventilation is dangerous) with actual structured training. Not just tables, but dynamic drills you can do anywhere: apnea walks, breath-hold bodyweight exercises, diaphragm and rib cage mobility work, plus the classic CO2/O2 table training with proper guidance.
It's called DryDive and it's a free web app — no download needed, works on your phone. The idea is that if you only get in the water once or twice a week, you can still make meaningful progress on dry land between sessions.
I'd genuinely love feedback from this community. You all have way more collective experience than I do, and I want to make sure this is actually useful rather than just another app that collects dust.
A few things I'm specifically curious about:
  • What does your dry training routine actually look like between water sessions?
  • Are there drills or exercises you swear by that most apps/programs miss?
  • For the spearos here — do you do any breath-hold specific training on land, or is it mostly just time in the water?
If you want to check it out: drydive.polsia.app
Happy to answer any questions, and genuinely open to criticism. Trying to build something that actually serves this community, not just look good on a screen.
Dive safe.
While I applaud you efforts to create something helpful I am skeptical given your limited background in the subject matter which is still evolving. Anyone can use AI to get fairly useful information but you know what it is. From an app might seem more accurate even though rigorous fact checking might be missing. For example I noticed you edited out something about Wim Hof breathing. In short you have no skin in the game and the stakes for someone else getting hurt are high
 
  • Like
Reactions: Mischa Burns
Hey everyone,
Wanted to introduce myself properly. I'm a freediver who trains mostly solo — no club nearby, no regular buddy for pool sessions. Like a lot of people here, I picked up freediving through spearfishing and got hooked on the breath-hold side of things.
One thing that always frustrated me was the gap between sessions. I'd do a pool or ocean session, feel great, then spend the next week doing… not much. The CO2/O2 table apps out there are fine for what they are, but they're basically glorified stopwatches. No technique guidance, no progression, nothing that connects the physiology to the actual training.
So I started building something for myself — a dry training companion that combines the theory side (CO2 tolerance, mammalian dive reflex, why hyperventilation is dangerous) with actual structured training. Not just tables, but dynamic drills you can do anywhere: apnea walks, breath-hold bodyweight exercises, diaphragm and rib cage mobility work, plus the classic CO2/O2 table training with proper guidance.
It's called DryDive and it's a free web app — no download needed, works on your phone. The idea is that if you only get in the water once or twice a week, you can still make meaningful progress on dry land between sessions.
I'd genuinely love feedback from this community. You all have way more collective experience than I do, and I want to make sure this is actually useful rather than just another app that collects dust.
A few things I'm specifically curious about:
  • What does your dry training routine actually look like between water sessions?
  • Are there drills or exercises you swear by that most apps/programs miss?
  • For the spearos here — do you do any breath-hold specific training on land, or is it mostly just time in the water?
If you want to check it out: drydive.polsia.app
Happy to answer any questions, and genuinely open to criticism. Trying to build something that actually serves this community, not just look good on a screen.
Dive safe.
 
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