4.4
97 reviews
5K+
Downloads
Content rating
Everyone
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image

About this app

A free app for calculating decompression profiles and gas consumption for technical divers.

* truly free: no ads, no runtime limit, no in-app purchases
* Bühlmann ZHL-16C with gradient factors
* up to three decompression gases
* Air/Nitrox/Trimix
* calculates gas consumption, minimum gas, required tank volume
* CNS%, OTU, ppO2, ppN2, gas density
* salt water / fresh water
* choose last stop depth
* choose metric or imperial (psi, ft) units
* share profiles by other apps (email, whatsapp, ...)
Updated on
Jul 13, 2025

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
No data collected
Learn more about how developers declare collection

Ratings and reviews

4.3
90 reviews
A Google user
April 19, 2019
Thanks for creating this! I love the simplicity and works great. I do have two feature requests: 1. Support repetitive dives. Even if you just add the ability to specify RNT in addition to minutes (so the RNT time doesn't count towards gas calculation). Bonus points for providing a way to calculate RNT. 2. Make it so I can select/copy the text I'd be happy to beta test or help out adding features.
3 people found this review helpful
Did you find this helpful?
Mark Martin
June 7, 2020
I rated this low originally because the setting to ascend at 10ft per minute after first stop caused weird runtimes when doing stop to gas switch to EAN32 at 130 ft. I recommend disabling that in settings. I increased rating to 5 stars because of the fast and helpful response by Easy App Master.
Did you find this helpful?
Easy App Master
June 8, 2020
Thank you for updating your feedback. This option is enabled by default, because after a typical gas switch such as Tx18/45 to EAN50 at 70ft, helium off-gases independent from depth so there's no benefit from an immediate fast ascent to the first deco stop and divers prefer to slow down. With air as bottom gas, it's different.
A Google user
May 31, 2019
Good simple app, but can you set your own stop intervals? for a 42m dive with a bottom time of 30 mins I'd like to stop at 21m, and then every 3m. would be great if the ascend stops could be customised like 21, 18, 15, 12, 9, 6 I want the GF to be 50/70 I'd use EAN 25 as my bottom gas and EAN50 from 21m upwards.
2 people found this review helpful
Did you find this helpful?
Easy App Master
June 11, 2019
The purpose of GF_low setting is to define the deepest first stop. GF 25/75 with EAN25+EAN50 will put the first stop to 21m. Picking GF50/75 means the user wants a shallower first stop. Your idea with the first stop at the gas switch makes sense: http://scubatechphilippines.com/scuba_blog/gradient-factors-application-use-settings-open-circuit-tech

What’s new

* library updates for Android 15

App support

About the developer
Dr. Michael Pronath
techdeco@yahoo.com
Germany
undefined