Dive planning phone Application

BullMix: Simplest planner
Safest dives.

Available for iOS and Android

BullMix is a dive planning mobile application for open circuit or rebreather. From 3 parameters given by the user: the target depth, the bottom time, and the average diver’s gas consumption, the application gives the high and low gradient factors, the Time To Surface (TTS) and the set of gas to use for an optimum decompression.

More over BullMix :

Here is the new BullMix version with new features, bug corrections and performances enhancements.

A first important new feature is the integrated help accessible from the app's about view.

Parameter changes:

  • the maximum ppo2 maximum for an OC tank is now 1.6
  • the maximum equivalent narcosis depth is now 39 meters for Nitrox and Trimix Nitrogen

Bug corrections:

  • the tank showed in the description are now correct
  • after a tank edition the app now scrolls correctly
  • corrects the narcosis description
  • the maximum Nitrogen is 30% for Trimix Helium


  • Let's create a dive.

    A CCR dive uses a rebreather and OC dive in opencircuit.

  • Just enter the parameters: 55 meters, 20 min and 17 l/min and touch Done.

  • We get the dive plan with the TTS.

  • And a set of tanks for the dive and an optimized decompression.

    The burned volume is in orange since it represents at least the 2/3 of available volume.

  • We change the main tank volume to 18 liters.

  • We also change the main bloc pressure to 280 bars.

  • There is now enough volume for the dive.

    Including the third rule.

  • We change the first decompression tank for a Nitrox 40.

  • We then remove the second decompression (Nitrox 83) that we don't need.

  • Again we remove another decompression BullMix proposed and we keep the 100% O2.

  • The TTS changed after the modification of mixes.

  • Touch on to see the dive description.

  • Steps minute by minute.

  • Stops for the decompression.

  • Share the dive's description by touching .


Is BullMix totally free ?

BullMix is free for recreationnal and sport dives for both CCR and OC. It contains in-app purchases to unlock full CCR dives or full OC dives.

Is cave diving support planned ?

Yes, a cave dives module is planned but no date yet.

Is SRC support planned ?

Yes, a SCR dives module is planned but no date yet.

What is the '*' in a tank's title ?

The star ('*') marks out that the tank was modified from it's original proposition.

I modified a tank and I lost it ?!

BullMix sorts tanks by decreasing MOD, changing the gas ratios changes the MOD, the tank has just moved in the list.

Can I retrieve a dive deleted by mistake ?

No, when a dive is deleted there is no possiblity to retrieve it.


BullMix doesn't collect any personnal data.

BullMix relies on RevenueCat for in-app purchases. Their privacy policy is expressed here.

BullMix will eventually be connected to a dive log. For the willing users, these data could be shared for scientific research. Any change in this privacy policy will be notified to the users.