r/freediving • • 20d ago

App/Web Development & Research Requests Megathread

6 Upvotes

This megathread is for sharing apps, websites and research requests.

Due to the high volume of app development posts, standalone app advertisements are currently not allowed. If you want to advertise your app or request feedback/research, please use this megathread instead.

Required Information

Every submission must include:

  • Short description — What does the app do?
  • Direct link — App, App Store/Google Play, or website link.
  • Privacy & data handling — A direct link explaining your privacy policy and how user data is collected/used/stored or shared.
  • Pricing — Clearly state whether the app is free, paid, subscription-based, contains in-app purchases
  • Other important information — Include anything users should know before using or purchasing your app. Don't make users hunt for important information.

Submissions missing required information may be removed.

AI Features

If your app includes any AI-powered feature, you must send the app to the moderators for review before posting it.

When in doubt, message the mods before posting.


r/freediving • • Apr 09 '26

community update Update and Rule Changes on Advertising in the Sub

13 Upvotes

Hey there,

we have received a lot of feedback lately on various topics and one of them has been the rigorous moderation of advertising on the sub. We have seen different processes and also a huge growth in the community, as well as influx of app development in the freediving world to help you improve your training at home.

This ranged from ads unrelated to freediving, to opening the sub and looking at an endless stream of new apps at some point, which led to feedback that members were having a hard time finding actual training advice or discussion topics.

For that u/BotGivesBot came up with the Megathread "App Advertising and Research Requests" to create a central place where you can specifically go, if you are looking for a new trainings app or participate in a research request related to freediving. This has helped tremendously in steering the flood.
They are also working hard to setup the new Signal channels, that will also provide an avenue to post ads for courses & retreats.

We also were trying to find a process how to manage Advertising for Freediving Professionals, because courses, retreats or gear are directly tied into participation in our sport and it has been admittedly really difficult to walk the line on not having to approve each ad single-handedly and at the same time making sure they maintain a minimum standard of info and not just spam the sub for coverage.

Rule Changes

The community rules can be found here

Rule 5 - Advertising for Freediving Professionals:

Instructors / Diveshops / Divetrip-Organizers can create standalone posts with the postflair "Ad" to advertise courses, trainings or trips, events and must include: dates, location, schedule, pricing, business-link/socials.
Product can be advertised as standalone post the postflair "Ad" and must include: description, pricing, product-link.
You are encouraged to use pictures for your ads.

Ads will be removed at discretion of being found spammy, info missing or if the ad is freediving-unrelated.

Rule 6 - App advertising goes in the Megathread

If you'd like to advertise your application, you can post them into the Megathread "App Advertising and Research Requests" Because of a strong influx of app development we do not allow single-post app ads currently. The Megathread description shows the required info that your post must include, failure to include the necessary info will result in removal from the Megathread.

When in doubt, message the mods.

Rule 7 - Research requests need mod approval

If you're looking for research participants, you need to get permission from the mods prior to posting.
Approved research requests go into the Megathread "App Advertising and Research Requests".
All requests can be forwarded to the mods using modmail.

We are retiring the Megathread: Event Promotion and Course/Workshop Opportunities

Because it hasn't seen a lot of action since its inception - it will still be there, it will just be unpinned and the updated rules on Advertising for Freediving Professionals take precedent.

----------------------------------------------

We try to create and remake the processes based on your community feedback, as well as the resulting workload that we receive as reports or messages. So if something's not working for you, we rely on your help that you let us know about that.

And we try to make it better

Thanks a bunch - 3 mods and a modbot in a trenchcoat


r/freediving • • 9h ago

equalisation Are EQ issues not worth it?

3 Upvotes

Got the freediving bug, having always loved snorkelling and the underwater world. Started an AIDA course however I'm having to re-attempt the depth element because I absolutely could not equalise upside-down at any depth. I can frenzel at surface but each dive attempt led to the same outcome - cannot unblock my right ear (with no mucous / inflammation that I'm aware of).

I'm already having such difficulties, will it be this hard at each depth going forward? I would love to get into this long-term, but don't want to set myself up for heartache. If you struggle with EQ from the outset, will it always be an uphill battle?


r/freediving • • 9h ago

media My CNF video in my last lesson

2 Upvotes

In my last depth lesson, after completing all the requirements, I did a no-fins dive to 20 m (I was still wearing my socks, hadn't removed it). It was my personal best depth to reach without fins. I didn't use a wetsuit or any weights as well.

https://reddit.com/link/1x4f5qr/video/l33zkl0zx3vh1/player


r/freediving • • 1d ago

dive spot Week long freediving trip recommendations?

6 Upvotes

I took a beginner course 2 years ago that included a couple days in a class room and learning in a pool. I haven’t had a chance to really try it out since and I am looking to go somewhere for about a week to learn and experience more. I live in California and am preferably looking for something not too far and on the more affordable side. Somewhere with accommodations and food inclusions would be great. If anyone has done something similar, please let me know!


r/freediving • • 21h ago

gear Heart rate strap for freediving (and cycling): worth it? What do you use?

3 Upvotes

Hi all,

I’m looking at getting a chest strap HR monitor that I could use for both freediving and cycling, and I’d like some real-world feedback before buying.

My situation: I do both pool and depth, usually diving to around 20 m. For cycling I use a Wahoo Elemnt Bolt v2 (ANT+ and BLE), so the strap needs to pair with that.

What I’ve figured out so far:

  • Bluetooth/ANT+ doesn’t transmit underwater, so a strap needs internal memory to record the dive and sync afterwards.
  • Cheap straps without memory (Polar H9, Coospo H808S) seem useless for this.
  • Polar H10 seems to be the usual choice (30 m rated, memory, works with Polar Beat), which should cover my depth.
  • Suunto Smart Sensor looks like a cheaper option with memory, but BLE only.
  • Garmin HRM-Pro Plus is rated to 50 m, but I’m not sure its memory works without a Garmin watch.

My questions:

  1. What do you actually use for HR tracking while freediving, and are you happy with it?
  2. Do you get reliable readings in salt water, or does the signal get noisy?
  3. Any tips for getting good electrode contact (wetting, gel, strap position) so the signal doesn’t drop during the dive?
  4. Honestly, is it useful? Does seeing your HR curve help with training (bradycardia, diving response, recovery between dives), or is it more of a gimmick?

Thanks in advance, any experience welcome!


r/freediving • • 1d ago

media Curious about this video

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6 Upvotes

Why is she moving her hands like that in the six minutes mark onwards? I thought it was from the discomfort but there are so much more theories in my head


r/freediving • • 1d ago

gear First time wearing a wetsuit. Bad cramps in the lower regions

6 Upvotes

As the title says. I did my first dive in a wetsuit and was having major abdominal and ball cramps. Was it just because I’m not used to it or maybe I’m not wearing my suit right? It fits me well so I’m not sure.


r/freediving • • 1d ago

equalisation Involuntary urge to inhale after equalizing — does anyone else experience this?

3 Upvotes

First of all, thank you for the advice you gave me before. Over the summer, I trained with a freediving instructor for about two months and learned the fundamentals. I’m genuinely grateful to everyone here who encouraged me to get proper training.

I’m not sure if this is the right place to ask, but sometimes while diving I get a strange involuntary urge to inhale. It seems to happen especially right after equalizing. My nostrils almost feel like they’re automatically trying to breathe in, and lately it has started to make me a little nervous.

The strange part is that I’m not actually running out of air when this happens. I’ve usually only just started the dive and I’m still early in my breath-hold. It doesn’t feel like a genuine need for air, more like an involuntary breathing reflex through my nose.

This might sound like a weird question, but does anyone else experience this? Especially after equalizing?


r/freediving • • 2d ago

travel advice Freediving in the Galapagos

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38 Upvotes

Freediving in the Galápagos Islands is an absolute thrill that takes ocean adventure to a whole new level. Without the heavy gear or bubbles of traditional scuba diving, freediving offers an intimate, silent connection with one of the world’s richest marine ecosystems.


r/freediving • • 1d ago

gear The Best deep PERFORMANCE freediving fins available

4 Upvotes

Seems like the BEST deep freediving bi-fins for performance have been the Cetmas TARAS with proven podium results over these past few years outshinning the Pro Hyper Molchanovs line overall, IMO. However, several other brands have coincidentally popped up around the same time just a few months ago--namely:

C4 Protech (https://c4carbon.com/freediving/en/product/protech-fins/)

Alchemy ICON (https://alchemy.gr/products/icon-fins)

and the VBLabs Axiom (https://www.official-secrets.com/en/products/vb-labs-axiom)

I would venture to guess that the battle for the top fins would be between the Alchemy Icon or the VBLabs Axiom---both of these fins seems very progressive and if there is any hope to dethrone the TARAS these could be the ones. The TARAS are the only ones to have one universal stiffness.

If anyone has experience with any of these latest fins and their nuances please and share.

But in reality I don't think there would be MUCH difference overall between the fins--but at elite levels of the sport a few % points can make for that final edge.


r/freediving • • 2d ago

travel advice Is 21h 45min enough between -32 m training session and flying?

6 Upvotes

I am considering squeezing in some training sessions in an indoor dive centre on my next overseas trip, and a session is available which fits my schedule and ends 21h 45min before my flight back home.

I want to work on my comfort and equalisation between -27 m and -32 m.

Is this interval safe for flying? What is the minimum surface interval for this kind of training session? Is it 12 hours or 18 hours? Is it not deep enough to require a full 24 hours?


r/freediving • • 2d ago

training technique Is it normal to want to freedive and still be scared?

21 Upvotes

Hello, I suppose this post is regarding mental training for freediving. Has anyone ever had to challenge their fear of the water/depths in order to go further in this sport/hoby, or are all free divers naturally unafraid of the water. I love the water, and have been swimming my whole life, I want to explore the water (especially the ocean) more, and becoming a proficient freediver seems like the perfect way to explore this passion. Yet I am paradoxically scared of the water (I think it's thalasophobia more than anything). Is this normal, does the fear subside when your confidence and education grows, or am I just not cut out for this?


r/freediving • • 2d ago

gear Broke my fin, can I glue it in any way?

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8 Upvotes

I was super careful and no idea how it happened 🥲

Can I save it in any way? Edit: forgot to mention that it's a plastic fin. SEAC BM-30


r/freediving • • 2d ago

equalisation Soft palate equalisation, struggle with mouthfill

3 Upvotes

I'm at a point in freediving where I want to start diving beyond my residual volume. Up until now I've had no issue equalising, it came quite naturally to me. Now I get stranded at a depth of +- 38 meters, which I assume is where I reach residual volume. The next logical step looks like learning mouthfill, which I have been attempting and getting coaching in.

The only issue is that I have an "unusual" equalisation technique, so it's not the standard frenzel to mouthfill transition and even my coach is kind of struggling because he doesn't have the same soft palate controle I use when equalising.

The technique I use is doing a reverse pack and then compressing the air with my soft palate. I can handsfree equalise to +-10 meters, after that it feels like a combination between handsfree and frenzel where I have to pinch my nose. But I don't use my tongue at all and my throat doesn't make the tell tale movement of frenzel. The main "push" of air really comes from my soft palate. I can also easily inflate a balloon when equalising with the otovent.

So now with learning mouthfill, I can fill my mouth with air. But then when I equalise, I equalise 'behind' my tongue with the reverse pack + soft palate push I'm used to, these moves really feel tied together. The rest of the air just stays in my mouth and it feels like I can't use it. When I try to use my soft palate to push the air in my mouth up without reverse packing, I automatically open my glottis, losing the mouthfill.

Some people have advised me to learn frenzel and then mouthfill, so I can use the tongue push. But even if I try this I have to actively open my soft palate to be able to push this air up. And this seems like such a step back because I can equalise just fine right now.

Any other people who equalise like this or recognize it? Can anyone point me in the right direction? Should I focus on learning a clean frenzel, or try to use mouthfill with my current handsfree/soft palate equalization? Any tips, videos, exercises,... are much appreciated. Thank you!


r/freediving • • 2d ago

gear Minimal Free diving equipment

3 Upvotes

Hi,

I am new to this sub, since I only read about free diving for the first time in my life, even though I practiced it somehow regularly since I was a kid because I just love diving in the sea.

I mostly dive in the Mediterranean sea and depth wise I go comfortably to like 10-12m. 15m is my max. The duration of my dives is maximum 2 to 3mins I would say.

For now I only own a good diving mask and a simple snorkel from a tourist shop. I don't use the snorkel so often. I never go with a suit or with fins. And tbh I like it this way because it just feels good to carry as less as possible and just dive and swim for fun.

I am interested in taking photos or videos of my dives and wonder if there is some other light to carry equipment that you would recommend for my purposes. Also is there a way to carry a gopro on a belt for example? Maybe would also be good to store the the snorkel when not in use?

Since I love climbing out of the water from on some rocks to sunbathe there or just enjoy the view I am basically looking for a way to carry my equipment in a way so I don't need to get out the water so often.

I am happy for any tips you guys can give me! :) Thank you!


r/freediving • • 3d ago

equalisation equalization tool

2 Upvotes

I am looking to buy an EQ tool / Otovent for the purpose of training equalization. How should I choose the correct specification to buy? Can any equalization tool be used to train for any depths? Also, how should I get replacement balloons as well?

For me, I currently want to train for equalization which can help me exceed my RV depth, about -27 m with full lungs.


r/freediving • • 3d ago

gear Need help choosing wetsuit size

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6 Upvotes

r/freediving • • 4d ago

certification AIDA 4 vs Molchanovs W3

5 Upvotes

Can any advanced freedivers give me some insights which system is better for further progression in freediving? I am on AIDA and recently got my AIDA 3, and I am now thinking how I should progress further, as I am interested in learning the skills to bring me beyond RV.

My current ability is maximum 2:52 static, dynamic 60 m comfortable and 75 max, bi-fins 27 m comfortable and 32 max, and no fins 16 m comfortable and 21 m max.

I started learning freediving 6 years ago to be a recreational freediver hoping to be comfortable down to -20 to -30 m, while training to be a competitive open water swimmer, however, I have already lost the motivation to swim competitively because of the lack of support of it in London, and I would like to do another water-based competitive sport to replace open water swimming.

My problem now is that, I will have to stay in the UK for the coming winter due to other life and career goals, and I absolutely don't want to dive in a wetsuit. (no-mask CNF is my favourite discipline) In fact, I did my AIDA 2 in Hong Kong and hadn't dived for years as I was in a wrong climate, before I resumed diving this year, and did my AIDA 3 in Hong Kong this summer as well. I have also experienced hostility in the UK due to my insistence of non-wetsuit diving. (5 years ago, I tried to put on a wetsuit and dive, and I didn't feel good at all.)

I find that the Molchanovs system is more attractive if I eventually want to become an athlete. Molchanovs also has the flexibility that it is theoretically possible for me to do the L3 first in a pool before I go back to Hong Kong / Taiwan to complete the W3 afterwards in the open sea, not wasting any time to do pool practices, while such flexibility doesn't exist at the advanced AIDA 4 level (there are AIDA 2 pool and AIDA 3 pool only).

However, there is a complete lack of Molchanovs resources in the UK. There is only 1 W3i instructor in the whole country and she is based in rural Scotland, while I live in London. In contrast, there are plenty of AIDA Master Instructors in the UK, including London, but they won't be helpful if I never want to complete the whole AIDA 4 course in the UK, as I only want to dive in places warm enough to not use a suit.

I am not ready to do the advance course yet in terms of depth, as I haven't achieved total comfort at -30 to -32 m depth yet, and I will probably need to wait until next summer to go back to Hong Kong for further practice.

I would like advice how I should progress during the winter without access to any depths, as during my AIDA 3 course, I felt that my Frenzel equalisation started to become difficult beyond -27 m, and also which system I should continue on if I eventually do the advanced course.

If I remain a recreational freediver, do I actually need to take AIDA 4 or Molchanovs Wave 3? If I want to become an athlete, is the Molchanovs system (Wave 3) really much better than AIDA?


r/freediving • • 3d ago

health&safety Controversial: increasing CO2 tolerance is dangerous for recreational freediving

0 Upvotes

Recently this thought crossed my mind. If you build good CO2 tolerance - then you can dive longer and now have increased risk of a blackout. Low CO2 tolerance is like your guardian angel.

Thoughts?


r/freediving • • 4d ago

training technique Freediving bottom turn

6 Upvotes

https://youtu.be/wDHbf6pVPGw

A simple and easy method for freediving turns (suitable for all, from beginners to competitors)
After passing the carabina stopper on your descent, simply grab the line with your thumb pointing to the surface, keep going down, extend the other arm to touch the target depth (bottom weight or bottom plate)
The hand grabbing the line should have the lanyard on the wrist.
When you keep descending while grabbing the line, your body will naturally and effortlessly turn to 180 degrees.
Once you turned, perform one strong pull on the line to get you started, then fin back up (the pull will also let your buddy know that you started ascending)


r/freediving • • 4d ago

training technique High Hemoglobin

5 Upvotes

Has anyone else had a doctor report high hemoglobin count? I'm currently at 50m dynamic no-fin apnea, without weights and as novice I imagine my form is poor, but curious if this kind of training could contribute to increased hemoglobin count (I'm not far above sea level and haven't traveled or trained for high altitude). I did do a google search and found this paper: https://pmc.ncbi.nlm.nih.gov/articles/PMC11092981/, basically curious if others have had elevated hemoglobin that they attribute to breath hold training. Thanks!


r/freediving • • 5d ago

media beautiful views from the bottom of the rocky abyss

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79 Upvotes

the beauty of freedive - always dive with a certified safety and have a clear dive plan


r/freediving • • 5d ago

gear Double wristing?

6 Upvotes

Hello great people of the freediving community. I’m fairly new to freediving and I’m curious as to why some freedivers wear 2 or more dive computers? Is it mostly for redundancy or something else?


r/freediving • • 5d ago

dive buddy Training Partners Near Philadelphia

2 Upvotes

Hello all,
I’m looking to continue training as I get ready for my level 2 course and was hoping there might be some fellow divers in the Philly area or somewhere within an hour or 2. Ideally looking for a dive buddy / training partner.

Not sure exactly what other info is helpful here, so lmk if I should include more details.

Feel free to comment or DM if you’d be interested or know someone who might be :)