Freedive vs Buoyancy Calc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Freedive
This app helps freedivers improve their breath-holding abilities with customizable training tables and performance tracking. It offers automated CO2 tolerance and O2 deprivation tables, along with the ability to create personalized sessions. Track your progress and receive notifications during your training.
- Auto-generated CO2 tolerance tables
- Auto-generated O2 deprivation tables
- Customizable table creation
- Breath hold duration testing
- Attempt history tracking
- Advanced notifications with vibration/speech
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A simple but effective breathhold training application for freedivers. - Use auto-generated tables for CO2 Tolerance and O2 Deprivation - Create your own custom tables by choosing table size freely and setting all durations individually - Test your breath hold duration and have a history of your attempts. - Uses advanced notifcations with vibration or speech during tables
Buoyancy Calc
Calculate the optimal weight for scuba diving based on environmental factors. Input your weight, water type, tank, and exposure suit to get a suggested weight for neutral buoyancy.
- Calculate suggested diving weight
- Adjust for water type
- Adjust for tank type
- Adjust for exposure suit
- Supports pounds and kilograms
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Quickly find out the suggested weight you should add when scuba diving in different environments. Based on PADI's Peak Performance Buoyancy basic weighting guideline*. Enter your weight in pounds or kilograms, and additionally set the type of water, tank, and exposure suit to dial in a suggested amount of weight to help keep you neutrally buoyant. *Note that this app and the developer are not officially a representative of PADI. This app will give the user a good estimate of the weight needed for the environment selected, but there are always adjustments needed to achieve peak performance, based on gender, physique, exposure suit age, accessories, etc.
Screenshots
Verdict
The clearest difference is review sentiment: Freedive at 94% against Buoyancy Calc's 40%. Freedive also leads on rating (4.6 vs 3.1) and update cadence (every 6 weeks vs every 3 months). On price, ratings volume, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Freedive holds the better App Store score, 4.6 against 3.1. Both are backed by a comparable volume of ratings — 14 and 25 respectively. Written reviews point the same way: 94% of Freedive's written reviews are positive against 40% of Buoyancy Calc's.
Freedive ships an update every 6 weeks, Buoyancy Calc every 3 months. The most recent releases landed on August 19, 2026 and June 8, 2026 respectively.
| Parameter | Freedive | Buoyancy Calc |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (14 ratings) — better | 3.1 (25 ratings) |
| Positive reviews | 94.1% of reviews — better | 40.0% of reviews |
| Number of ratings | 14 | 25 — better |
| Update frequency | Every 6 weeks — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 8.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 24 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Luca Naterop | Eric Hamiter |
Customer experience
Freedive
Buoyancy Calc
In-app purchases
Freedive
No in-app purchases
Buoyancy Calc
No in-app purchases
